-
et
stini
J20
e odefaovect, tdecnag
U-shaped relationship between agency costs of debt and the
managerial compensation parameters: themanagers reservation income,
salary and ownership share.
2008 Elsevier B.V. All rights reserved.
e nane hasbeen
e real-discuserging
derived a valuation result for corporate bonds and employed
thisresult in constructing a proof on capital-structure
irrelevance.Brennan and Schwartz (1978) used the real-options
approach toreach a result on optimal capital structure and
incorporated bank-ruptcy costs and default probability in their
derivation of an opti-mal capital structure. It is fair to say that
the now well-appliedreal-options analytical platform on agency
costs and capital struc-ture can be largely attributed to the work
of Mello and Parsosns
growth opportunities (Childs et al., 2005), incomplete
markets(Hugonnier and Morellec, 2007) and a handful of further
modellingextensions. However, despite the rich variety of models on
capitalstructure and agency costs, this debate has yet to fully
incorporatea classic agency problem: the ownermanager conict. Most
ofthese models have discussed corporate settings in which a
creditorsigned a contract with an entrepreneur who was also the
soleowner, thus prompting the need to include managerialdiscretion
in investment decision making, within the
real-optionsframework.
Journal of Banking & Finance 33 (2009) 709718
Contents lists availab
k
w.E-mail address: [email protected] incentives of a manager
who makes the nancing and invest-ment decisions and thus by
redening agency costs of debt in areal-options context.
The real-options account of the interaction between
investmentand nancing decisions is now over thirty-years-old.
Drawing onthe then recently developed option pricing theory, Merton
(1974)
explored the fundamental issue of optimal debt maturity and
withLeland (1998) who incorporated the choice of corporate risk
andprovided a most comprehensive account of the
agency-theoreticagenda within the real-options framework. This
platform has sincebeen enriched with market structure
considerations (Lambrecht,2001), nancing constraints (Boyle and
Guthrie, 2003), stochasticobjective is to make a contribution to
this debate by exploring
interest between shareholders and creditors. In this paper, our
debate was further advanced by Leland (1994) who introduced
the exibility of debt renegotiation, Leland and Toft (1996)
whoKeywords:Agency conictsIrreversible investmentManagerial
compensationCapital structure
1. Introduction
Being the cornerstone of corporatital-structure relevance to rm
valuclusive debate which has longoperational exibility insights of
thstream of literature has extensivelyand optimal capital structure
as em0378-4266/$ - see front matter 2008 Elsevier B.V.
Adoi:10.1016/j.jbankn.2008.11.002ce, the question of cap-generated
a still incon-
enriched with theoptions paradigm. Thissed investment timingout
of the conicts of
(1992) who examined the case of a hypothetical mining
invest-ment with operational and nancial exibility and were the
rstto measure agency costs of debt. Mauer and Triantis
(1994)produced probably the richest operational exibility setting
inthe debate on optimal capital structure and suggested that
whileoperational exibility signicantly affected the nancing
decisions,nancing exibility had little effect on the operational
decisionmaking. The real-options account of the optimal
capital-structureD92E22G31
reservation income. Yield spreads (optimal leverage ratios) are
increasing (decreasing) in the managerssalary and ownership stake,
while they are decreasing (increasing) in the managers reservation
income.Exploring agency costs of debt as deviations from a
value-maximizing investment policy, we document aIrreversible
investment, managerial discr
Andreas AndrikopoulosUniversity of the Aegean, Department of
Financial and Management Engineering, 31 Fo
a r t i c l e i n f o
Article history:Received 18 June 2008Accepted 6 November
2008Available online 19 November 2008
JEL classication:D81
a b s t r a c t
We explore the signicancment timing, endogenousagers incentive
to under(order to work on the projesequent income, should hements
decreases with ma
Journal of Ban
journal homepage: wwll rights reserved.ion and optimal capital
structure
Str., 82 100 Chios, Greece
f employee compensation and alternative (reservation) income on
invest-ult, yield spreads and capital structure. In a real-options
setting, a man-r)invest in a project is associated to labor income
he has to forego inhe managers salary, his stake on the projects
equity capital and his sub-ide to terminate operations. We nd that
the optimal level of coupon pay-erial salary and ownership stake
while it is increasing in the managers
le at ScienceDirect
ing & Finance
elsevier .com/ locate / jbf
-
Cadenillas et al. (2004) built on the option-like features of
cor-porate securities and explored shareholdermanager conicts
aswell as the effect of managerial compensation on capital
structure.In this modelling framework, managers were only rewarded
withstock and decided on corporate risk and the level of effort
theywere to exert, while the choice of leverage and of the level of
man-agerial compensation was made by the shareholders. In a
corporatesetting where stock ownership is the only compensation of
risk
710 A. Andrikopoulos / Journal of Bankingaverse managers which
face costly effort, the capital-structurechoice would depend on the
managers efciency, momentum aswell as company size. Grenadier and
Wang (2005) revisited thequestion of investment timing for an
option to invest, in the con-text of ownermanager contracts in an
all-equity rm. In theiragency-theoretic contribution to the problem
of optimal invest-ment timing, they explored the issue of
asymmetric informationand costly effort. Decomposing the option to
invest into a man-agers option and an owners option, they found
that both underin-vestment and overinvestment can hold in
equilibrium. Mauer andSarkar (2005) examined the effect of the
conict between share-holders and creditors on capital structure and
on investment tim-ing. Based on the tax-deductibility of interest
income, they foundthat the shareholders choice of investment and
nancing will gen-erate deviations from value maximization and will
create agencyconicts and costs. In their model, the shareholders
incentive tooverinvest imposes agency costs on yield spreads and
the resultingcost of capital determines nancing as well as
investmentdecisions.
Making a contribution to the ongoing debate on the
interactionbetween investment timing and capital structure, this
paper ismotivated by empirical ndings that the ownercreditor
agencyconict alone cannot explain the observed variations in
deviationsfrom value-maximizing investment (Parrino and Weisbach,
1999)and that managerial compensation is signicant in
determiningcapital structure (e.g. Smith and Watts, 1992) as well
as corporatevalue (e.g. Coles et al., 2001). We explore
over-and-under invest-ment with respect to the managers
compensation and interactionswith corporate investors, in the
framework of a levered rm.Investment timing, real option value,
optimal capital structureand agency costs of debt are estimated for
various structures ofmanagers compensation and reservation income.
For the purposesof our analysis on investment timing, we employ the
investmentnancing setting of Mauer and Sarkar (2005), where
corporatedecision makers decide on investment timing and optimal
capitalstructure, which is implemented at the moment when the
projectstarts. Section 2 lays out our real-options framework,
Section 3analyzes some analytical and numerical results and Section
4 con-cludes the paper, indicating directions for future
research.
2. An investment setting
We explore the case of a rm that has a monopolistic,
perpetualright to implement an investment project. The projects
cost is I.The decision to invest is made by the rms manager.1 The
man-agers compensation consists of an equity stake a on the rm anda
xed salary Cp which is collected per unit of time.2 In order
for
1 In this approach, implicit is the assumption that the
shareholders cannot managethe operations of theproject themselves
and this is why the manager is hired. Thisassumption matters in the
discussion ofthe managers deviations from equitymaximizing
investment in Section 3: the shareholders are worseoff in the sense
thatinvestment and nancing choices are not aligned with their
objectives but, ontheother hand, running the project on their own
is more inefcient (e.g. substantialdecline in
operatingprotability).
2 One could argue here that the managers compensation is taxed.
Imposing a
personal tax rate wouldnot change our conclusions on investment
timing and capitalstructure. Alternatively, one could thinkof Cp as
the after-tax managers income fromsalary.the project to start, the
manager will have to give up previousemployment that yields income
PI. The rms income from projectsoperations is taxed at a tax rate
sc. Projects operations generate sto-chastic revenue P and incur a
xed cost C per unit of time. The man-agers salary is part of the
xed cost, hence we must have C > Cp. Wealso assume that the
dynamics of P can be replicated by forming aportfolio of traded
assets in a risk neutral, no-arbitrage economyand satisfy the
following stochastic differential equation
dP r dPdt rPdz; 1where r is a risk free interest rate, r is the
standard deviation of an-nual returns on a portfolio that perfectly
replicates the dynamics ofP, d is a convenience yield that can be
earned by holding the produc-tion output in inventory, dt is an
increment of time and dz is theincrement of a Wieners process. When
the option to invest is exer-cised, the capital-structure choice is
implemented and the invest-ment project could be partly nanced with
a debt contract, inwhich case the amount of debt nancing is K and
the shareholderscontribute the rest I K. This nancing arrangement
can happen inthe setting of a line-of-credit contract (or a loan
commitment), inwhich external funds are committed up to a
contractually speci-ed amount to be available in a future point in
time for the rmsneeds. The amount of debt nancing K is determined
in a contractsigned by the manager and the creditor. If debt
nancing is pro-vided, the rm faces a xed coupon payment R per unit
of time. Pro-ject abandonment and bankruptcy are decided upon by
themanager. Should the rm go bankrupt, the creditor will take
overthe rms assets, suffering bankruptcy costs b (0 < b < 1).
In theevent of bankruptcy, the manager will nd employment in
anotherjob that yields an income of RI that can be considered as a
kind ofreservation income.
2.1. Solving for the unlevered asset value
After the project has started, the operational exibility that
isavailable to the managers discretion consists of the option to
shutdown the project. In this all-equity case, well-known portfolio
rep-lication arguments can be used to show that the managers
wealthMU(P) satises
0:5r2P2MUPP r dPMUP rMU aP C1 sc Cp 0: 2The general solution of
(2) is of the form
MuP a Pd C
r
1 sc Cpr A1P
b1 A2Pb2 for P > PUA ; 3
where A1 and A2 are constants to be determined and PUA is the
opti-
mal abandonment level, maximizing the managers wealth.
Thesolution to the homogeneous part of the equation yields
b1 12 r d
r2
r dr2
12
2 2rr2
> 1
sand
b2 12 r d
r2
r dr2
12
2 2rr2
s< 0:
Since the abandonment option is decreasing in P, we needA1 =
0.
The equation for the value of managers wealth in the case ofthe
unlevered rm is subject to the following boundary conditions.
limP!1
MUP a Pd C
r
1 sc Cpr 4:1
MUPUA RI and 4:2U
& Finance 33 (2009) 709718@M@P
PPUA
0 4:3
-
MLP a Pd C R
r
1 sc
Cpr a P
LD
d C R
r
!1 sc Cpr RI
!P
PL
!b212
king & Finance 33 (2009) 709718 711Applying (4.1)(4.3),
(4.1), we get
MUP a Pd C
r
1 sc
Cpr a P
UA
d C
r
" #1 sc Cpr RI
!P
PUA
!b2; 5
where
PUA db2a Cr 1 sc Cpr RI
a1 sc1 b2:
As for the shareholders, the value of the unlevered rm VU(P)
satis-es the following partial differential equation
0:5r2P2VUPP r dPVUP rVU P C1 sc 0 for P > PUA6
subject to the boundary conditions
limP!1
VUP Pd C
r
1 sc 7:1
and
VUPUA 0: 7:2The solution of (6) yields
VUP Pd C
r
1 sc P
UA
d C
r
!P
PUA
!b21 sc 8
the abandonment trigger PUA being known from the solution to
themanagerial wealth problem. These differences in the
operatingchoices of corporate decision makers and residual
claimants seenhere in the case of default and investment triggers
create the needfor an effective system of corporate control (Fama
and Jensen,1983).
This valuation result will be needed to calculate the asset
valueaccruing to the creditor in the event of default.
2.2. Calculating managerial wealth in a levered rm
In the case of a levered rm, the value of managers wealthML(P)
satises
0:5r2P2MLPP r dPMLP rML aP C R1 sc Cp 0:9
The general solution of (9) is of the form
MLP a Pd C R
r
1 sc Cpr A3P
b1 A4Pb2 for P > PLD;
10where A3 and A4 are constants to be determined and P
LD is the opti-
mal default trigger, as seen from the managers point of
view.Since the abandonment option is decreasing in P, we need
A3 = 0. The equation for the value of managerial wealth in the
caseof the unlevered rm is subject to the following
boundaryconditions.
limP!1
MLP a Pd C R
r
1 sc Cpr 11:1
MLPLD RI and 11:2@ML
@P
0 11:3
A. Andrikopoulos / Journal of BanPPLD
If we apply (11.1), (11.2) and (11.3) to (10) we getD
and
PLD db2 a CRr 1 sc Cpr RI
a1 sc1 b2:
As for the shareholder, the value of equity EL(P) satises the
follow-ing partial differential equation
0:5r2P2ELPP r dPELP rEL P C R1 sc 0 13subject to the boundary
conditions
limP!1
ELP a Pd C R
r
1 sc Cpr and 14:1
ELPLD 0: 14:2The solution yields
ELP Pd C R
r
1 sc P
LD
d C R
r
!P
PLD
!b21 sc:
15PLD being known from the solution to the managerial
wealthproblem.
Following e.g. Leland (1994), the value of debt D(P) after
theexercise of the investment option, is given by
DP Rr A5Pb1 A6Pb2 16
and constants A5 and A6 are determined by the boundary
conditions
limP!1
DP Rrand 17:1
DPLD 1 bVUPLD: 17:2Implicit in (17.2) is the assumption that, if
the rm goes bankruptand the creditor becomes the sole owner, the
creditor will hire amanager to run the then unlevered rm and the
manager will ofsimilar type as the one we have discussed so far.
This can be a legit-imate assumption since it is more efcient for
the new owners tocontinue operating the project with managers that
have morerm-specic knowledge and value (Douglas, 2001).
Substitutingfor (17.1) and (17.2) in (16) yields
DP Rr 1 bVUPLD
Rr
P
PLD
!b2: 18
Summing debt and equity and rearranging the components of
thevalue of the levered rm yields
VLP VUP scRr
1 P
PLD
!b20@1A bVUPLD PPLD
!b2: 19
(19) demonstrates that the value of levered rm is equal to
thesum of the value of unlevered rm and the tax benets of debtminus
the value of bankruptcy costs.3
3 The effect of the tax advantages of debt and of the bankruptcy
costs on the choiceof capital structurehas recently been conrmed in
a survey on the decision-making
criteria of European CFOs (Brounen et al., 2006) as well as in
empirical work oninternational evidence on the capital structure
choice (de Jong et al., 2008; Wu andYue, 2009).
-
(26). We dene agency costs of debt as
king2.3. Pricing the option to invest
The manager has the right to choose the time of project
imple-mentation. Upon exercise of this real option, the manager
will startreceiving salary Cp, he will pay a fraction a of the
equitys contribu-tion to investment cost (since he is rewarded with
this portion ofthe rms equity) but he will also have to part with
his previous in-come PI, which could be taken to be the present
value of a perpet-ual stream of salary payments that come from
competingprofessional engagements, even within the same rm.
Let PM be the exercise trigger for the investment option and
Kthe amount of debt nancing. The value of the managers exibilityM
before the option is exercised satises
12r2P2MPP r drPMP rM 0; P < PM: 20
The solution of (20) is of the form
MP A7Pb1 A8Pb2 ; P < PM; 21
where constants A7 and A8 are determined with the
boundaryconditions
MPM MLPM aI K PI 22:1and
@M@P
PPM
@ML
@P
PPM
22:2
can be used to numerically solve for PM.Upon exercise, the
creditors will be willing to supply capital
only equal to the equilibrium value of debt under an
investmentpolicy that maximizes the managers wealth. Therefore, at
exercise,we will have K = D(PM). Yield spreads are dened as the
differencebetween the effective rate that is charged on corporate
debt RDP andthe risk free rate of interest r. We introduce yield
spreads in ouranalysis of managerial compensation and capital
structure basedon the theoretical prediction of John and John
(1993) that yieldspreads are expected to be increasing in
managerial ownership,since managerial ownership affects the outcome
of agency con-icts and may lead to deviations from value and
equitymaximization.
Let FM be the value of the option to invest as a rms asset, if
theinvestment policy aims at maximizing managerial wealth. FM canbe
calculated if we measure the value of M with Cp, RI, PI equalto
zero and a equal to 1, maintaining however, PM as an
investmenttrigger. If we set Cp, RI, PI equal to zero and a equal
to 1 and furtheruse this parameter set to estimate an investment
trigger we cannd an equity-maximizing investment trigger PE.
In the same vein, we can calculate the value of the option to
in-vest under a policy that aims at maximizing the value of all
in-volved stakeholders: debt, equity and managerial wealth.
Totalvalue is given by
TVLTVL D 1 aEL ML: 23
Since the managers wealth ML includes a portion a of
equityownership, we have to subtract aEL, in order to avoid a
double cal-culation of this part of equity value. Accordingly,
total investmentcost includes not only I, but also PI, which is the
income that themanager foregoes in order to get involved in the
project.
In this rst-best case the option to invest satises
1 2 2 F
712 A. Andrikopoulos / Journal of Ban2r P FPP r drPFP rF 0; P
< P : 24
PF being a rst-best, value-maximizing investment trigger.ACM FPF
FMPMFPF : 28
As a benchmark, we can calculate agency costs of debt in thecase
of an equity-maximizing investment, abandonment andnancing policy.
Agency costs of debt due to equity maximizationare thus dened
as
ACE FPF FEPEFPF ; 29
where FE is the value of the option to invest in the setting of
an equi-ty-maximizing investment policy.
Numerical results in the following discussion on
investmenttiming can help discuss investment timing and capital
structureas outcomes of the decision makers employment conditions:
highsalary, low salary and large ownership stake.
3. Numerical results
In this section we discuss the effect of the managers
reservationincome, salary and ownership stake on investment timing,
optimalcapital structure, yield spreads and agency costs of debt.
Numericalresults on the effect of the other parameters interest
rate, bank-ruptcy costs, volatility, etc. can be found in previous
work on realoptions and capital structure (e.g. Leland, 1998; Mauer
and Ott,2000). Without any loss of generality, we will assume that
RI PI,that is the income themanagerwill have to forego, should he
decideto implement the project, is the same as his reservation
income.
Throughout the numerical analysis of this section we employthe
same reference set of parameters: P = $1, R = $0.8, C = $0.75,RI =
$1, Cp = $0.04, I = $3, r = 0.05, d = 0.02, a = 0.03, b = 0.35,sc =
0.2, r = 0.3.
3.1. Investment timing and capital structure: The effect of
managerialcompensation
We explore the effect of the parameters which are related to
themanagers compensation (reservation income, salary and owner-ship
share) on investment timing and capital structure. It is the
ex-tent of deviation from value-maximizing investment which
affectsthe size of the yield spread imposed by the creditor and it
is thiscost of debt that affects the managers choice over coupon
sizeand capital structure.
3.1.1. Managerial compensation and the interaction
betweeninvestment and nancing decisions: Managers reservation
incomewhere constants A9 and A10 are calculated with the
boundaryconditions
FPF TVLPF I PI 26and
@F@P
PPF
@VL
@P
PPF
27
TV given in (23). (27) can be used to numerically solve for
theinvestment trigger PF, in the value-maximizing setting of (25)
andThe solution of (24) is of the form
FP A9Pb1 A10Pb2 ; P < PF ; 25
& Finance 33 (2009) 709718The managers reservation income
affects the managers invest-ment and nancing decisions and
therefore affects the value of thereal option to invest and the
magnitude of the yield spread on
-
0.85
Option value to the manager vs coupon payment for varying
reservation income
0.6 0.7 0.8 0.9 1 1.1 1.2 1.30.5
1
1.5
2
Reservation income
Inve
stm
e FB
EB
Fig. 1b. Sensitivity of investment trigger to the managers
reservation income. Theinvestment trigger is chosen so as to
maximize the value of the managers option toinvest (MB). The dashed
line is the rst-best investment trigger (FB) whichmaximizes value
for all parties (shareholder, creditor and manager) and the
dottedline is the investment trigger in an operating policy which
maximizes equity value(EB). Output price (P) is $1, coupon payment
(R) is $0.8, operating cost (C) is $0.75,managers salary (Cp) is
$0.04, project cost (I) is 3$, risk free rate of interest (r)
is0.05, dividend yield (d) is 0.02, managers ownership share (a) is
0.03, bankruptcycosts (b) are 0.35, tax rate for corporate income
(sc) is 0.2 and standard deviation ofannual returns (r) is 0.3.
120
130
140
150
160
spre
ad
Yield spread vs Reservation income
A. Andrikopoulos / Journal of Banking & Finance 33 (2009)
709718 713corporate debt. Our numerical solutions can be synopsized
in thefollowing result:
Result 1: The managers reservation income has a positive
effecton the level of the investment trigger and it has a negative
effect onthe value of the managers real option to invest as well as
on thelevel of the yield spread.
The value of the managers option to invest and the
subsequentvalue of managerial wealth after the real option has been
exercisedare decreasing in the managers reservation income (Fig.
1a); high-er levels of reservation income essentially delay
investment andprecipitate default thus reducing the prospective
value of income
0 0.5 1 1.5 2 2.5 30.5
0.55
0.6
0.65
0.7
0.75
0.8
Coupon
Opt
ion
valu
e to
the
man
ager
RI=1
RI=1.1RI=1.2
Fig. 1a. Sensitivity of option value to coupon payments, for
varying levels of themanagers reservation income. Output price (P)
is $1, operating cost (C) is $0.75,managers salary (Cp) is $0.04,
project cost (I) is $3, risk free rate of interest (r) is0.05,
dividend yield (d) is 0.02, managers ownership share (a) is 0.03,
bankruptcycosts are 0.35 (b), tax rate for corporate income (sc) is
0.2, and standard deviation ofannual returns (r) is 0.3.out of
project implementation.4
The effect of the reservation income on the managers option
toinvest stems from the impact of reservation income on
investmenttiming and the capital-structure choice. If the
reservation income isvery low, the manager will be very eager to
start the project in or-der to earn the salary and benet from the
tax shield of debt, thusending up to overinvest, compared to both
the rst-best (FB) andthe equity-maximizing (EB) investment policies
(Fig. 1b). On theother end, if the managers reservation income is
high, he willnot start the project until protability is high enough
to compen-sate him for the sacrice of the reservation income, thus
resultingin an exercise policy of underinvestment. For intermediate
levels ofreservation income RI ranging from $0.8 to $0.92 the
managerwill have an incentive to overinvest with respect to the FB
policyand underinvest with respect to the EB policy.
Deviations from value-maximizing investment -project startand
termination- have their impact on the yield spreads. The man-agers
reservation income has a decreasing effect on yield spreads(Fig.
1c); High levels of reservation income weaken the
managersequity-driven incentive to overinvest and this effect
outweighs themanagers motive for early default. These conditions
make thecreditors decrease yield spreads and hence the cost of
debt. Loweryield spreads -associated with higher reservation
income- will in-
4 Differentiating the default trigger can show that the effect
of managerialcompensation on the level ofthe default trigger is
similar in spirit to the effects oninvestment timing; high salary
makes projectrelatedemployment more attractive anddelays default,
whereas high reservation income makesalternative
employmentopportunities more attractive and thus precipitates
default.2.5
3
3.5
nt tr
igge
r MB
Investment trigger vs Reservation incomecrease the level of the
optimal coupon payment as well as the opti-mal leverage ratio5,
since debt is cheaper and also because increasedtax shields are
required to induce the manager to give up his reser-vation income
and start the project. As far as I know, there has beenno previous
research to associate the managers income from alter-native
employment opportunities with the capital-structure ques-tion in a
dynamic setting of irreversible investment.
0.8 0.9 1 1.1 1.2 1.370
80
90
100
110
Reservation income
Yiel
d
Fig. 1c. Sensitivity of the yield spread to the managers
reservation income. Yieldspread is dened as the difference between
the effective rate on corporate debt andthe risk free rate (r). The
effective rate is calculated as the ratio of coupon R to debtvalue
D(P). The spread is measured in basis points. Output price (P) is
$1, couponpayment (R) is $0.8, operating cost (C) is $0.75,
managers salary (Cp) is $0.04,project cost (I) is $3, risk free
rate of interest (r) is 0.05, dividend yield (d) is 0.02,managers
ownership share (a) is 0.03, bankruptcy costs (b) are 0.35, tax
rate forcorporate income (sc) is 0.2 and the standard deviation of
annual returns (r) is 0.3.
5 We dene the optimal leverage ratio as the prevailing leverage
ratio when thecoupon payment is at its optimal level.
-
In the case of our numerical example (Fig. 1b), the optimal
sizeof the coupon ranges from $1.02 for the RI = $1 case to $1.29
for theRI = $1.2 case. However, due to the fact that optimal coupon
pay-ment increases with the reservation income, the decline in
optionvalue starts at lower coupon levels in the case of low
reservationincomes and this is the reason that after the optimal
coupon pay-ment has been reached and before option exercise option
valuefor low reservation income can briey be less than option
valuefor options with higher reservation income. For our
parameterset, option should be immediately exercised for coupon
values onthe right of the kink in the coupon-option graph. After
the optionto invest has been exercised, we are essentially
addressing an issueof the effect of coupon payments on managers
wealth when he isin charge of an ongoing project and the negative
association be-tween reservation income and the value of the
managerial optionstill holds for the reasons discussed above.
In the setting of our numerical example, we observe that, as
weexpected, optimal leverage is increasing in the managers
reserva-tion income; optimal leverage ratio is 0.43 for R = $1 and
it in-creases to 0.52 for R = $1.2. It is the lower yield spreads
for highlevels of reservation income that make increased leverage
moreattractive in the case of higher reservation income.
option at a lower level of P (Fig. 2b). For low salary levels,
themanager does not want to give up his reservation income andget
involved in the project, thus leading to phenomena of
underin-vestment with respect to both FB and EB policies.
Associated with the managers motive to overinvest, the effectof
the managers salary on the yield spreads is positive. An in-creased
salary will strengthen the managers incentive to overin-vest so as
to start getting paid and will also make him want to(suboptimally)
keep the project alive for as long as possible, so asto maintain
the xed income ow. This overinvestment motiveleads to high spreads
in the cases of high salaries (Fig. 2c). Highercosts of debt for
higher levels of salary mean that, as the managerssalary increases,
the optimal coupon size and the optimal leverageratio decrease;
optimal coupon size is $1.29 and optimal leverageis 0.52 for a
salary of $0.03, while optimal coupon size is $0.75and optimal
leverage is 0.27 for a salary of $0.05).
Our result on the effect of managers salary on investment
tim-ing and capital structure extends the discussion in Mauer and
Sar-kar (2005) on the determinants of investment and
nancingdecisions in a real-options framework.
3.1.3. Managerial compensation and the interaction
betweeninvestment and nancing decisions: Managers ownership
stake
Managerial ownership has often been employed as a contrac-tual
mechanism in the direction of aligning the objectives of
themanagers with the ones of the owners. The following result
sum-
714 A. Andrikopoulos / Journal of Banking & Finance 33
(2009) 7097183.1.2. Managerial compensation and the interaction
betweeninvestment and nancing decisions: Managers salary
Having examined the impact of the managers reservation in-come
on investment timing and the capital-structure choice, weproceed to
explore the effect of the managers compensation con-tract that
consists of salary and a share of equity ownership. Ournumerical
examination of the effect of the managers salary onthe interaction
between investment and nancing decisions hasyielded the following
result.
Result 2: The managers salary has a negative effect on the
levelof the investment trigger and it has a positive effect on the
value ofthe managers real option to invest as well as on the level
of theyield spread.
High levels of salary naturally make the managers option
worthmore and also increase managerial wealth in the case of
managingan ongoing levered company after the project has started
(Fig. 2a).Furthermore, the higher the managers salary, the stronger
themanagers motive to start the project and hence to exercise the
real
0 0. 5 1 1. 5 2 2. 5 30. 5
0. 55
0. 6
0. 65
0. 7
0. 75
0. 8
0. 85
0. 9
Coupon
Opt
ion
valu
e to
the
man
ager
Cp =0 .0 5
Cp =0 .0 4
Cp =0 .0 3
Option value to the manager vs coupon payment for varying
manager's salary
Fig. 2a. Sensitivity of option value to coupon payments, for
varying managerssalary. Output price (P) is $1, operating cost (C)
is $0.75, managers reservationincome (RI) is $1, project cost (I)
is $3, risk free rate of interest (r) is 0.05, dividend
yield (d) is 0.02, managers ownership share (a) is 0.03,
bankruptcy costs are 0.35(b), tax rate for corporate income (sc) is
0.2 and standard deviation of annual returns(r) is 0.3.marizes the
ndings of our analysis on effect of managerial owner-ship on the
managers choice over investment timing and capitalstructure.
Result 3: The managers ownership share has a negative effecton
the level of the investment trigger and it has a positive effecton
the value of the managers real option to invest as well as onthe
level of the yield spread.
The effect of the managers ownership share on the value of
hisoption to start a project is, of course, positive (Fig. 3a). The
higherthe compensation involved in running the project, the more
valu-able will the option be and the more valuable his wealth will
be
0.02 0.025 0.03 0.035 0.04 0.045 0.05 0.055 0.060.5
1
1.5
2
2.5
3
3.5
Manager's salary
Inve
stm
ent t
rigge
r
MB
FB
EB
Investment trigger vs Manager's salary
Fig. 2b. Sensitivity of investment trigger to the managers
salary. The investmenttrigger is chosen so as to maximize the value
of the managers option to invest (MB).The dashed line is the
rst-best investment trigger (FB) which maximizes value forall
parties (shareholder, creditor and manager) and the dotted line is
the investmenttrigger in an operating policy which maximizes equity
value (EB). Output price (P) is$1, coupon payment (R) is $0.8,
operating cost (C) is $0.75, managers reservationincome (RI) is $1,
project cost (I) is 3$, risk free rate of interest (r) is 0.05,
dividend
yield (d) is 0.02, managers ownership share (a) is 0.03,
bankruptcy costs (b) are0.35, tax rate for corporate income (sc) is
0.2 and standard deviation of annualreturns (r) is 0.3.
-
deviations from equity-maximizing and also from
value-maximiz-ing investment is in line with the intuition of John
and John (1993)that managerial ownership affects the agency costs
of both equityand debt. It is interesting that, for high levels of
a, additional own-ership does not offer improved alignment with
equity-maximizinginvestment policies. This is a result of the fact
that for high levels ofmanagerial ownership, the sensitivity of the
investment trigger tothe managers salary and reservation income
weakens and thedeviations from equity-maximization cannot be
further restrainedby granting the managers an additional stake of
corporate owner-ship. The weak sensitivity of the investment
trigger with respect tomanagerial ownership agrees with empirical
evidence in Singh andDavidson (2003) that increased managerial
ownership cannoteliminate managerial motives to exercise discretion
and deviatefrom equity maximization.
Fig. 3c shows that the higher the managers stake on
equityownership, the higher the yield spread will be. This is
becausethe higher the managers equity stake, the stronger the
tendencyof the manager to abide by an equity-maximizing policy
callingfor overinvestment and late default in order to rip off the
taxshields of debt. Therefore, in the case of increased managerial
own-ership, the increased risk of debt contracts can lead to an
increasedyield spread. This result is in accordance with the
theoretical pre-diction of John and John (1993) as well as the
empirical evidence ofStrock Bagnani et al. (1994) and Dadyvenko and
Strebulaev (2007)that yield spreads should be increasing in the
ownership compo-nent of managerial compensation.
0.02 0.025 0.03 0.035 0.04 0.045 0.0570
80
90
100
110
120
130
140
150
160
Manager's salary
Yiel
d sp
read
Yiled spread vs Manager's Salary
Fig. 2c. Sensitivity of the yield spread to the managers salary.
Yield spread isdened as the difference between the effective rate
on corporate debt and the riskfree rate (r). The effective rate is
calculated as the ratio of coupon R to debt valueD(P). The spread
is measured in basis points. Output price (P) is $1, coupon
payment(R) is $0.8, operating cost (C) is $0.75, managers
reservation income (RI) is $1,project cost (I) is $3, risk free
rate of interest (r) is 0.05, dividend yield (d) is 0.02,managers
ownership share (a) is 0.03, bankruptcy costs (b) are 0.35, tax
rate for
A. Andrikopoulos / Journal of Banking & Finance 33 (2009)
709718 715after the exercise of the investment option (on the right
of thekink).
The level of the investment exercise trigger is decreasing in
thelevel of the managers ownership share; for low levels of
manage-rial ownership share, the manager is less eager to leave his
previ-ous (reservation) income in order to start the project and
gain asmall portion of corporate prots and tax shields and
thereforehe tends to underinvest, compared to both the rst-best
invest-ment trigger and the equity-maximizing investment policy.
Forsufciently high levels of ownership share, he is more willing
topart with his reservation income and benet from the tax
shields
corporate income (sc) is 0.2 and the standard deviation of
annual returns (r) is 0.3.of debt and this is why he will end up
overinvesting (Fig. 3b).Our nding that managerial ownership can be
associated with
0 0.5 1 1.5 2 2.5 3
0.8
1
1.2
1.4
1.6
1.8
2
Coupon
Opt
ion
valu
e to
the
man
ager
a=0.7
a=0.5
a=0.3
Option value to the manager vs coupon payment for varying
ownership shares
Fig. 3a. Sensitivity of option value to coupon payments, for
varying managersownership share. Output price (P) is $1, operating
cost (C) is $0.75, managers salary(Cp) is $0.04, managers
reservation income (RI) is $1, project cost (I) is $3, risk
freerate of interest (r) is 0.05, dividend yield (d) is 0.02,
bankruptcy costs are 0.35 (b),tax rate for corporate income (sc) is
0.2 and standard deviation of annual returns (r)is 0.3.The positive
effect of managerial ownership on yield spreadsand hence on the
cost of debt means that higher levels of manage-rial ownership will
be associated with lower levels of optimal cou-pon payment and also
with lower optimal leverage ratios; as themanagers ownership stake
increases, the size of the optimal cou-pon decreases from $1.02 for
a = 0.03 to $0.87 for a = 0.07. For thisparameter range, the
optimal leverage ratio falls from 0.43 to 0.27because the
equity-driven incentive to overinvest leads to in-creased yield
spreads and therefore to a lower optimal coupon
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
1.4
1.6
1.8
2
2.2
2.4
2.6
Manager's ownership share
Inve
stm
ent t
rigge
r
MB
FB
EB
Investment trigger vs Manager's ownership share
Fig. 3b. Sensitivity of investment trigger to the managers
ownership share. Theinvestment trigger is chosen so as to maximize
the value of the managers option toinvest (MB). The dashed line is
the rst-best investment trigger (FB) whichmaximizes value for all
parties (shareholder, creditor and manager) and the dottedline is
the investment trigger in an operating policy which maximizes
equity value(EB). Output price (P) is $1, coupon payment (R) is
$0.8, operating cost (C) is $0.75,managers reservation income (RI)
is $1, managers salary (Cp) is $0.04, project cost
(I) is 3$, risk free rate of interest (r) is 0.05, dividend
yield (d) is 0.02, bankruptcycosts (b) are 0.35, tax rate for
corporate income (sc) is 0.2 and standard deviation ofannual
returns (r) is 0.3.
-
tion income in the case of default. As salary increases, these
agency
0.7 0.8 0.9 1 1.1 1.2 1.3 1.40
0.005
0.01
0.015
0.02
0.025
0.03
0.035
0.04
Reservation income
Agen
cy c
osts
of d
ebt AC M
AC E
Agency costs of debt vs Reservation income
Fig. 4a. Sensitivity of agency costs of debt to the managers
reservation income.Agency costs of debt (ACM) are dened as the
percentage difference between optionvalue under a nancinginvestment
policy that maximizes managerial wealth andone that maximizes value
for all parties (shareholder, creditor and the manager).The ACE
line plots agency costs of debt in an equity-maximizing
investmentnancing policy. Output price (P) is $1, coupon payment
(R) is $0.8, operating cost(C) is $0.75, managers salary (Cp) is
$0.05, project cost (I) is $3, risk free rate ofinterest is (r)
0.05, dividend yield (d) is 0.02, managers ownership share (a) is
0.03,bankruptcy costs (b) are 0.35, tax rate for corporate income
(sc) is 0.2 and standarddeviation of annual returns (r) is 0.3.
king & Finance 33 (2009) 709718and leverage ratio. This
result is in accordance with ndings in Jen-sen et al. (1992) that
higher insider ownership is associated withlower levels of
debt.
3.2. The effect of managerial compensation on agency costs of
debt
Agency costs of debt were dened in (28) as the percentage
dif-ference of option value under an investment policy that
maximizestotal value (i.e. equity, debt, managerial wealth) and
option valueunder an investment policy that aims at maximizing
managerial
0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5120
125
130
135
140
145
150
155
Manager's ownership share
Yiel
d sp
read
Yield spread vs Manager's ownership share
Fig. 3c. Sensitivity of the yield spread to the managers
ownership share. Yieldspread is dened as the difference between the
effective rate on corporate debt andthe risk free rate (r). The
effective rate is calculated as the ratio of coupon R to debtvalue
D(P). The spread is measured in basis points. Output price (P) is
$1, couponpayment (R) is $0.8, operating cost (C) is $0.75,
managers reservation income (RI) is$1, managers salary (Cp) is
$0.04, project cost (I) is $3, risk free rate of interest (r)
is0.05, dividend yield (d) is 0.02, bankruptcy costs (b) are 0.35,
tax rate for corporateincome (sc) is 0.2 and the standard deviation
of annual returns (r) is 0.3.
716 A. Andrikopoulos / Journal of Banwealth. Our numerical
solutions on the effect of managerial com-pensation on agency costs
have produced the following nding.
Result 4: There is an U-shaped relationship between agencycosts
of debt and the managerial compensation parameters: themanagers
reservation income, salary and ownership share.
We see in Fig. 4a that there exists an U-shaped pattern with
re-spect to the effect of the managers reservation income to
theagency costs of debt. For very low values of reservation
incomethere is a strong incentive to overinvest and this leads to
deviationsfrom value maximization. As the reservation income
increases,overinvestment incentives weaken and agency costs of debt
de-crease. However, beyond a point, high values of reservation
incomedecrease the attractiveness of project-related compensation
to themanager and thus he tends to underinvest and
underinvestmentleads to increased agency costs of debt. The ACE
line in Fig. 4ashows agency costs of debt under an
equity-maximizing setting,as dened in (28). We see that the agency
costs of debt are lowerunder the equity-maximizing investment and
nancing policies,in cases reservation income is too low (worse
managerial overin-vestment) or too high (worse managerial
underinvestment). Forintermediate values of reservation income, we
see that the agencycosts of debt under an equity-maximizing policy
are higher thanunder a policy that maximizes managerial wealth.
This means thatthe creation of an agency conict generates an
outcome that is clo-ser to the rst-best value maximization under
the managers thanunder the shareholders wealth maximization. This
result can beconsidered as an extension of the intuition of Brander
and Poitevin(1992) and John and John (1993), in the direction of
dynamicinvestment choice.We now proceed to discuss the effect of
managers salary on theagency costs of debt (Fig. 4b). We see that
there exists a U-shapedrelationship between managerial salary and
the agency costs ofdebt. For very low salary levels the manager
will tend to underin-vest because he will not have sufcient
motivation to part withthe reservation income and default too early
because the lowerthe managers salary the greater the attractiveness
of the reserva-0.02 0.025 0.03 0.035 0.04 0.045 0.05 0.0550
0.005
0.01
0.015
0.02
0.025
0.03
0.035
0.04
Manager's salary
Agen
cy c
osts
of d
ebt
ACE
ACM
Agency costs of debt vs manager's salary
Fig. 4b. Sensitivity of agency costs of debt to the managers
salary. Agency costs ofdebt (ACM) are dened as the percentage
difference between option value under anancinginvestment policy
that maximizes managerial wealth and one thatmaximizes value for
all parties (shareholder, creditor and the manager). The ACEline
plots agency costs of debt in an equity-maximizing
investmentnancingpolicy. Output price (P) is $1, coupon payment (R)
is $0.8, operating cost (C) is $0.75,managers reservation income
(RI) is $1, project cost (I) is $3, risk free rate ofinterest is
(r) 0.05, dividend yield (d) is 0.02, managers ownership share (a)
is 0.03,bankruptcy costs (b) are 0.35, tax rate for corporate
income (sc) is 0.2 and standarddeviation of annual returns (r) is
0.3.
-
effects weaken and the managers policy approaches
value-maxi-mization choices. Beyond a certain point of salary
increase how-ever, the manager will have an incentive to invest too
early so asto earn the high salary and will also have the incentive
to defaulttoo late so as not to give up the substantial salary
income. Thesemanagerial incentives cause the agency costs of debt
to increasein the case of high salary compensations. Between these
two ex-treme cases, agency costs of debt in an equity-maximizing
regimeare higher, compared to agency costs of debt under a policy
thatmaximizes managerial wealth.
Agency costs of debt have a U-shaped relationship with
themanagers ownership stake. For low levels of managerial
owner-ship, the manager will underinvest since compensation from
theproject may be less attractive compared to the reservation
income.This underinvestment motive weakens as the managers
owner-ship stake increases, shortening the deviations from a
value-max-imizing investment policy. However, beyond a point,
increasedownership renders the project increasingly attractive,
leading tooverinvestment and an increase in deviations from
value-maximiz-ing policies. We observe in Fig. 4c that agency costs
of debt under apolicy that maximizes managerial wealth (ACM) are
lower thanagency costs of debt in a setting of equity maximization
(ACE). Thisis because the overinvestment incentives of the
shareholders arepartly offset by the effects of the managers
reservation income.This effect of managerial ownership on the
agency costs of debtis more prevalent when managerial ownership is
at low levels.
pected wealth. Assuming a reference level of managerial
wealth(real option value) of $1.2 as a working example, Fig. 4d
demon-strates the family of contracts yielding the same level of
expectedwealth for the manager. As expected, there is a tradeoff
betweensalary and stock ownership along the compensation contracts
thatyield the same expected wealth of $1.2 to the manager. If the
man-ager is rewarded with higher levels of stock ownership, there
hasto be a decrease in the salary in order to keep the managers
wealthat the same level. Furthermore, we see in Fig. 4d that
increased lev-els of the managers reservation income warrant
increased com-pensation in the employment contract of the project
for the samelevel of expected managerial wealth. As we saw in Fig.
1a, higherlevels of reservation income decrease expected managerial
wealthfrom the project (i.e. the managers real option). Therefore,
as thereservation income increases, we must also increase
managerialcompensation in order to achieve the same level of
expected man-agerial wealth. Observing the wide range of contracts
that corre-sponds to a given level of managerial wealth,
welfareconsiderations raise the question of an optimal contract;
one thatmakes it incentive compatible for the manager to implement
theinvestment policy that maximizes total value. If we solve
numeri-cally for the optimal contract, we nd that a contract that
grantsthe manager with a salary of $0.041 and an ownership stake
of0.044, is consistent with both the benchmark level of $1.2 of
ex-pected managerial wealth and also value maximization as it
in-duces rst-best investment timing.
A. Andrikopoulos / Journal of Banking & Finance 33 (2009)
709718 717When the managers stake on equity capital is large, we
have seen,in Section 3.1, that the marginal effect of managerial
ownership onthe decisions to invest and default is rather small. As
a result ofthis, when managerial ownership is large, the agency
costs of debtwill not be substantially affected by the extent of
managerialownership.
Deviations from value maximization are a result of the debt
andemployment contracts. Given that the employment contract
deter-mines managerial wealth taking into account both salary and
stockownership for a given reservation income there is a plethora
ofcontracts that will provide the manager with the same level of
ex-
0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.20
0.005
0.01
0.015
Manager's ownership share
Agen
cy c
osts
of d
ebt
ACE
ACM
Agency costs of debt Manager's ownership share
Fig. 4c. Sensitivity of agency costs of debt to the managers
ownership share.Agency costs of debt (ACM) are dened as the
percentage difference between optionvalue under a nancinginvestment
policy that maximizes managerial wealth andone that maximizes value
for all parties (shareholder, creditor and the manager).The ACE
line plots agency costs of debt in an equity-maximizing
investmentnancing policy. Output price (P) is $1, coupon payment
(R) is $0.8, operating cost(C) is $0.75, managers salary (Cp) is
$0.05, managers reservation income (RI) is $1,
project cost (I) is $3, risk free rate of interest is (r) 0.05,
dividend yield (d) is 0.02,bankruptcy costs (b) are 0.35, tax rate
for corporate income (sc) is 0.2 and standarddeviation of annual
returns (r) is 0.3.All these contracts that yield the same level of
managerialwealth correspond to varying operating policies and hence
to vary-ing levels of yield spread. Fig. 4e shows how the
dependence of themanagers salary on the ownership stake in the
setting of the $1.2benchmark level of managerial wealth affects the
level of theinvestment trigger. The investment trigger increases
along thisfamily of employment contracts. As we increase managerial
own-ership, the investment trigger is affected by two contrasting
ef-fects. Increased stock ownership induces overinvestment
butdecreased salary depicted in Fig. 4d provides a motive
forunderinvestment and the latter effect prevails, leading to
the
0.03 0.035 0.04 0.045 0.05 0.0550
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
Manager's ownership share
Man
ager
's s
alar
y
RI=1 RI=1.1
Employment contracts that yield the same level of managerial
wealth
Fig. 4d. Family of contracts that yield the same expected wealth
to the manager, forvarying levels of reservation income (RI). For
each value of the stock-ownershipparameter a in the horizontal
axis, we nd the respective level of the managerssalary that yields
an expected level of managerial wealth equal to $1.2. Output
price(P) is $1, coupon payment (R) is $0.8, operating cost (C) is
$0.75, project cost (I) is $3,
risk free rate of interest is (r) 0.05, dividend yield (d) is
0.02, bankruptcy costs (b) are0.35, tax rate for corporate income
(sc) is 0.2 and standard deviation of annualreturns (r) is 0.3.
-
Investment trigger vs Managerial compensation (for a given level
of managerial wealth)
718 A. Andrikopoulos / Journal of Banking & Finance 33
(2009) 7097184. Concluding comments
Introducing ownermanager conicts to the agency-theoreticupward
sloping line of Fig. 4e. It is the investment timing of Fig. 4eand
the respective default policies that affect rm value and the le-vel
of the yield spread.
0.030.035
0.040.045
0.050.055
00.02
0.040.06
0.080
0.5
1
1.5
2
2.5
3
3.5
Manager'sownership shareManager's salary
Inve
stm
ent t
rigge
r
Fig. 4e. Sensitivity of investment trigger to the parameters of
the employmentcontract which are compatible with a given level of
expected managerial wealth.We rst nd the employment contracts a and
Cp that yield expected managerialwealth equal to $1.2 and then we
calculate the resulting investment timing policyfor this family of
contracts. Output price (P) is $1, coupon payment (R) is
$0.8,operating cost (C) is $0.75, managers reservation income (RI)
is $1, project cost (I) is$3, risk free rate of interest is (r)
0.05, dividend yield (d) is 0.02, bankruptcy costs (b)are 0.35, tax
rate for corporate income (sc) is 0.2 and standard deviation of
annualreturns (r) is 0.3.analysis of the option to invest, we
investigated the effect of man-agerial compensation and reservation
income on investment tim-ing and nancing decisions. We found that
the investmentexercise trigger is negatively associated to the
managers salaryand ownership share while it is positively
associated to his reser-vation income. The manager will choose a
coupon payment thatwill maximize his wealth and this optimal coupon
level is increas-ing in the managers reservation income and
decreasing with themanagers salary and ownership share. As for the
agency costs ofdebt, we documented a U-shaped relationship between
the man-agers reservation income and agency costs of debt. A
similarU-shaped pattern was found for the case of managers salary
andthe managers ownership share. Causally related to the
compara-tive statics of the yield spreads, optimal leverage ratios
aredecreasing in the managers salary and ownership share but
theyare increasing in his reservation income.
Future work in this area should address the issue of trading
fric-tions and information asymmetries in the market for nancial
andhuman capital and their impact on the managerial decision onwhen
to start and how to nance a project. Moreover, the optionto invest
could be decomposed into the component owned bythe manager and the
one owned by the equity holder. Finally, amore realistic
contractual setting of managerial compensationwould call for the
inclusion of employee-stock options. The deci-sion makers risk
attitude and effort aversion (Palmon et al.,2008) and the
non-transferability of these option contracts wouldorient the
capital-structure discussion to an analysis of
irreversibleinvestment in incomplete capital markets.
Acknowledgment
I thank an anonymous reviewer for many helpful suggestions.
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Irreversible investment, managerial discretion and optimal
capital structureIntroductionAn investment settingSolving for the
unlevered asset valueCalculating managerial wealth in a levered
firmPricing the option to invest
Numerical resultsInvestment timing and capital structure: the
The effect of managerial compensationManagerial compensation and
the interaction between investment and financing decisions:
Managers reservation incomeManagerial compensation and the
interaction between investment and financing decisions: Managers
salaryManagerial compensation and the interaction between
investment and financing decisions: Managers ownership stake
The effect of managerial compensation on agency costs of
debt
Concluding commentsAcknowledgmentReferences