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International Macroeconomics Sessions 7-8 Nicolas Coeurdacier - [email protected] Master EPP - Fall 2014
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International Macroeconomics Sessions 7-8

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Page 1: International Macroeconomics Sessions 7-8

International Macroeconomics Sessions 7-8

Nicolas Coeurdacier - [email protected]

Master EPP - Fall 2014

Page 2: International Macroeconomics Sessions 7-8

Practical Information

• email : [email protected]

• References: reading list for articles. Obstfeld and Rogoff "Foundations

of International Macroeconomics". Compulsory readings marked with an

* on the website.

• Course website: Link Master EPP on my webpage

http://econ.sciences-po.fr/staff/nicolas-coeurdacier

Page 3: International Macroeconomics Sessions 7-8

Practical Information

Grading

• Second mid-term homework: Given at lecture 8. To be handed back at

lecture 10

• Final Exam: One (or two) non-technical question(s) related to the course.

One (or two) problem set(s).

Page 4: International Macroeconomics Sessions 7-8

Road-map for the course

• Lectures 7-8: Financial integration, globalization and world income

• Lectures 9-10: International capital flows and current account dynamics

• Lectures 11-12: Risk-Sharing and International Real Business Cycles

Page 5: International Macroeconomics Sessions 7-8

Financial integration, globalization and world income

• Stylized facts on financial globalization: past and present

• Gains from international financial integration: theory and empirics

Page 6: International Macroeconomics Sessions 7-8

Stylized facts on financial globalization: past and present

Financial globalization �= Trade globalization

Measures of trade openness : What are the restrictions (tariffs and regulations)

to free trade?

(Exports + Imports)/GDP

Measures of financial globalization: extent of the openness in cross-border

financial transactions

Page 7: International Macroeconomics Sessions 7-8

Measures of financial globalization

De Jure and de Facto financial openness measures

De Jure: What are the restrictions to international capital movements based on the infor-

mation from the IMF’s Annual Report on Exchange Arrangements and Exchange Restrictions

(AREAER); example: In October 09, Brazil decided to tax capital inflows to discourage short-

term hot money from flowing in.

De Facto: how much international trade in financial assets ?

Page 8: International Macroeconomics Sessions 7-8

Which financial assets?

Characteristics of financial assets: mean to transfer some purchasing power

over periods (and states)

- Portfolio investment: equity or debt

- Foreign direct investment: > 10% ownership

- Other investments: loans, trade credit

- Derivatives (futures, options)

- Reserves (central banks)

Page 9: International Macroeconomics Sessions 7-8

Financial openness (De Jure)

Chinn-Ito index based on IMF information on restrictions to capital movements

Source: Chinn and Ito, 2008

Note: Index between -2.5 and 2.5. -2.5=Closed capi tal market; 2.5=Fully opened

-0,5

0

0,5

1

1,5

2

2,5

197

0

197

2

19

74

197

6

19

78

198

0

1982

19

84

198

6

19

88

199

0

1992

199

4

199

6

199

8

200

0

200

2

200

4

20

06

200

8

-0,8

-0,6

-0,4

-0,2

0

0,2

0,4

0,6

Developed Count ries (l eft -axis) Emerging Count ries (excluding Cent ral and Eastern Europe) (right-axis)

Page 10: International Macroeconomics Sessions 7-8

The world map of financial openness (De Jure) : index based on IMF information on restrictions to capital movements

Source: Chinn and Ito, 2008

Page 11: International Macroeconomics Sessions 7-8

De facto measure of financial globlization: flows and stocks

Flows: the value of assets traded for a given year : at

Stocks: the value of assets held in a given year:

At = At−1 + at = At−2 + at−1 + at = . . . Stocks are the cumulative flows

Several measures of financial globalization:

Stocks: IFI (International Financial Integration) measure

= (Domestic assets held by foreigners + Foreign assets held by domestic agents)/GDP

Issue of valuation (the value of assets can change over time, see later)

Page 12: International Macroeconomics Sessions 7-8

Several measures of financial globalization:

Flows:

inflows/GDP and outflows/GDP

Inflows: capital inflows/GDP: net purchases of domestic assets by foreign in-

vestors (for example, a loan by a foreign bank to a domestic firm). Inflows can

be negative if a foreign resident sells a domestic asset to a domestic resident

Outflows: net purchases of foreign assets by domestic investors (for example,

a domestic household buying a bond issued by a foreign government)

Page 13: International Macroeconomics Sessions 7-8

Strong increase in international assets held in both groups

More so in industrialized countries (x7!) than in emerging and dev. countries (x3)

International financial openness, 1970–2004(Domestic assets held by foreigners + Fore ign assets held by domestic agents)/ GDPsource Lane and Milesi-Ferreti (2007)

Page 14: International Macroeconomics Sessions 7-8

Financial Globalisation

Flows are more volatile than stocks: in the 2008 crisis, collapse of international flows

Page 15: International Macroeconomics Sessions 7-8

Two forms of globalization

• « Real »: trade flows

• Financial: financial flows

Compare the two forms of globalization:

= Ratio of financial openness (financial assets) to real openess (goods)

=(Domestic assets held by foreigners + Foreign assets held by domestic agents)/(Exports +

Imports)

Page 16: International Macroeconomics Sessions 7-8

Trade and financial integration, 1970–2004source Lane and Milesi-Ferreti (2007)

Domestic assets held by foreigners + Foreign assets held by domestic agents______________________________________________________________

Exports + Imports

Page 17: International Macroeconomics Sessions 7-8

Comparison of industrialized countries share in goods trade and financial trade

Page 18: International Macroeconomics Sessions 7-8

The first financial globalization

World capital markets very integrated at the end of the 19th century: Share of

British wealth invested overseas: 17% in 1870 and 33% in 1913 (larger than

any country today). Similar in France, Germany

Capital outflows from UK (purchase of foreign assets): mostly to the « New

World » with natural resources: Canada + Australia (28%), US (15%), Latin

America (24%)

source Taylor and Williamson (1994)

What form? Portfolio investment (equity and bonds to invest in railroads,

harbors)

Page 19: International Macroeconomics Sessions 7-8

Capital mobility: Obstfeld and Taylor, 2002 (a narrative based measure)

Page 20: International Macroeconomics Sessions 7-8

The first and second globalization: the financial side

Page 21: International Macroeconomics Sessions 7-8

Causes and consequences of the 19th century financial globalization

Causes:

- Transportation and communication (telegraph): information!

- High investment/growth in New World

Consequence:

- Fosters catch-up of the New World

- European capital chased European labor: both migrated to New World

Page 22: International Macroeconomics Sessions 7-8

A Remark: Capital Flows and the Lucas Puzzle

Neoclassical growth model predicts:

- Capital flows to capital scarce countries (higher marginal productivity of cap-

ital)

- Capital flows towards fast growing countries

Lucas Puzzle: Capital does not flow towards poorer countries. Less of a puzzle

during first globalization wave than now (see Lectures 8-9, Part I ‘Assessing

long-run international efficiency’)

Page 23: International Macroeconomics Sessions 7-8

Foreign capital used to flow to poor and rich countries , but now flows mostly to rich countries (The Lucas Puzzle)

Page 24: International Macroeconomics Sessions 7-8

The case for Financial Globalisation?

Washington Consensus: collection of loosely articulated ideas in the begin-

ning of the 1990s aimed at modernizing, reforming, deregulating and opening

economies

Mostly came from Latin American governments (IMF, WB, US Treasury came

later)

Consequence: many emerging markets opened up their capital markets in the

90s (while most developed markets were already opened, thus since the 80s).

Important to note restrictions on capital mobility are still more stringent for

developing countries (see previous graphs). Less of a consensus now.

Why did governments promote financial integration so actively?

Page 25: International Macroeconomics Sessions 7-8

Expected gains from financial integration

1) Intertemporal gains: consumption smoothing in response to shocks or inresponse to capital scarcity - small (Gourinchas and Jeanne (2006))

2) Intratemporal gains = international risk-sharing - still quite a debate on theirmagnitude (large if look at asset prices/small if look at real consumption)

3) Growth effects: risk-taking and specialization - scarce empirical evidence

4) The benefits in terms of domestic allocative efficiency: superior foreigntechnology (FDI), market discipline on domestic policies, social infrastructure,etc...

“[The] main potential positive role of international capital markets is to disci-pline policymakers who might be tempted to exploit a captive domestic capitalmarket” (Obstfeld 1998).

Page 26: International Macroeconomics Sessions 7-8

Expected gains from financial integration

- Intertemporal gains from financial integration

Gourinchas and Jeanne (2006)

- Intratemporal gains = international risk sharing

Basic two country (static) extension of Lucas (1978)

- Risk diversification and risk-taking

Saint Paul (1993) and empirical evidence

Page 27: International Macroeconomics Sessions 7-8

Gains from financial integration? Empirics

- Cross country regressions using IMF-based measures look at the impact of

financial integration on growth.

- Results range from no effect (Rodrik (1998)), to (small) significant effects

(Quinn(1997,2008), Edwards (2001), Bekaert et al (2005)...).

- Stock market liberalization increases equity prices (Henry (2003)) and to a

lesser extent investment and growth (Henry (2003), Bekaert et al (2005))

- Not obvious how to translate a given increase in growth in terms of welfare:

how permanent is the effect on growth? Does it change output levels in steady

state? What share goes to foreigners?

Page 28: International Macroeconomics Sessions 7-8

- Modern empirical growth literature emphasizes conditional convergence (Mankiw

Romer and Weil (1992), Barro, Mankiw and Sala-i-Martin (1995)).

- Early papers stressed factor accumulation, but recent literature emphasizes

total factor productivity (TFP) or social infrastructure (Hall and Jones (1999),

Parente and Prescott (2001)) as main drivers of cross-country income differ-

ences.

- Large welfare gains difficult to reconcile with portfolio home-bias

Page 29: International Macroeconomics Sessions 7-8

Empirical evidence of financial liberalization on growth

- Evidence based on event study in Henry (2003) for a sample of emerging

markets

- Tests predictions of standard neoclassical model:

(i) financial integration boosts growth and investment.

(ii) reduces the cost of capital (or increases asset prices).

Page 30: International Macroeconomics Sessions 7-8
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Empirical evidence of financial liberalization on growth

Bekaert et al. (2003) investigates the opening of stock markets to foreign

investors in a sample of 95 emerging markets. Pick up equity market liberal-

ization dates (�= capital account liberalization where effects are found to be

smaller/less robust)

Find roughly 1% increase in real GDP growth after stock market liberalization.

Mostly through capital accumulation but also TFP growth.

-Temporary effect?

- Is the date exogenous? Is it financial integration of stock markets or just

financial development?

- Upper bound of the effect?

Page 34: International Macroeconomics Sessions 7-8

Financial integration and real GDP growth

Source: Bek aert et al. ( 2003)

Page 35: International Macroeconomics Sessions 7-8

Classic Growth Regression and the Impact of Liberalization

Sample I II III IV

Constant -0.2281 -0.2374 -0.1493 -0.2018 Std. error 0.0179 0.0214 0.0286 0.0658

Log(GDP) -0.0094 -0.0088 -0.0115 -0.0158 Std. error 0.0007 0.0007 0.0008 0.0011

Govt/GDP -0.0039 -0.0178 -0.0187 -0.0301 Std. error 0.0087 0.0098 0.0105 0.0165Enrollment 0.0305 0.0112 0.0243 0.0566 Std. error 0.0077 0.0097 0.0116 0.0171Population Growth -0.5594 -0.5731 -0.8159 -1.1013 Std. error 0.0621 0.0691 0.0835 0.1151

Log(Life Expectancy) 0.0755 0.0781 0.0627 0.0838 Std. error 0.0049 0.0056 0.0076 0.0167

Official Liberalization Indicator 0.0095 0.0083 0.0113 0.0130 Std. error 0.0016 0.0017 0.0020 0.0036

Source: Bekaert et al. (2003)

Page 36: International Macroeconomics Sessions 7-8

Financial integration boosts investment

Source: Bek aert et al. ( 2003)

Impact F inanci al Liberalizat ion on GDP components

-0,025

-0,02

-0,015

-0,01

-0,005

0

0,005

0,01

0,015

0,02

Investment/GDP Consumpt ion/GDP Governm ent Spendings/GDP Net Exports /GDP

Page 37: International Macroeconomics Sessions 7-8

The elusive gains for international financial integration

Gourinchas and Jeanne (2006) proposes a new piece of empirical evidence basedon calibration of a standard neoclassical growth model

Main findings: first class of benefits is small

why?

- Countries needs to be very capital-scarce or abundant to experience largegains from financial integration.

- The ‘convergence-gap’ accounts for little of the world income inequality. Mostinequality explained by long-run cross country differences in productivity orsocial infrastructure (Hall and Jones (1999)).

- Important implications for the research agenda on capital account liberaliza-tion.

Page 38: International Macroeconomics Sessions 7-8

Gourinchas and Jeanne (2006)

- Look at the implications for capital account liberalization.

Focus on welfare benefits in response to capital scarcity.

- Calibrate variants of the standard (Ramsey-Koopman-Cass) model and com-

pare transition paths towards steady state under two scenarios:

- financial autarky;

- perfect financial integration with the rest of the world (small open economy).

Page 39: International Macroeconomics Sessions 7-8
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Dynamic of consumption: autarky

Page 42: International Macroeconomics Sessions 7-8

With financial integration: If this is a poor country and ROW in SS:

Euler equation becomes: ct = ct+1(βR∗)−1/γ

so consumption grows at g∗ when country is financially integrated.

Capital stock jumps to its steady state level. Why?

Page 43: International Macroeconomics Sessions 7-8

Dynamic of consumption: autarky versus integration

Page 44: International Macroeconomics Sessions 7-8

How much gain?

Calculate equivalent variation µ defined as the % (permanent) increase in con-

sumption that brings domestic welfare under autarky up to its level under inte-

gration.

Calibration:

Page 45: International Macroeconomics Sessions 7-8

Large gains require very large capital deficit (or surpluses): need k/k∗ < 1/3for µ > 2%

Page 46: International Macroeconomics Sessions 7-8

This despite (temporary) gains in growth (consistent with literature: after eq-

uity market liberalization, GDP growth increases by 1% over the next 5 years)

Basic intuition: the distorsion from financial autarky is transitory in nature (the

distorsion disappears anyway)

- either speed of convergence is fast (Ramsey) and not much gain from going

fast to SS

- or the problem is not convergence but the level of the SS level of capital,

consumption...

Page 47: International Macroeconomics Sessions 7-8

Limits and potential extensions to the neoclassical model

Deterministic view: risk affects the steady state level of capital stock (precau-

tionary savings). Hence, financial integration by providing risk sharing oppor-

tunities modifies the steady state. Can go either way in terms of welfare (see

Coeurdacier, Rey and Winant (2011) for a concept of ’risky steady-state’ and

Coeurdacier, Rey and Winant (2013) for the welfare gains of integration with

production & risk).

Absence of financial frictions: capital scarcity can be due to credit constraints.

If financial integration alleviates credit constraints, can generate permanent

welfare gains.

Possibility of non-convexities (poverty traps).

Page 48: International Macroeconomics Sessions 7-8

Financial integration and international risk-sharing: an introduction

- Other gains from financial integration: allow countries to diversify risks and

stabilize consumption.

- Empirical evidence: hard to reconcile with the data though.

1) some (but scarce) evidence financial integration reduces volatility of con-

sumption (small impact and financial integration increases the probability of

crisis)

2) risk-sharing predicts high consumption correlation across countries. But

smaller in the data than the correlation of output. "The quantity puzzle".

(much more on this in lectures 7-9).

Page 49: International Macroeconomics Sessions 7-8

A basic model of international risk-sharing

Set-up

Two symmetric countries (H) and (F ). One good (numeraire)

2 periods: t = 0 et t = 1

2 states of the world in each country (s = {rain, sun}) with equal probabilities

= 12;

p = probability that the weather is the same in both countries (rain or sun);

0 ≤ p ≤ 1.

Page 50: International Macroeconomics Sessions 7-8

A basic model of international risk-sharing

Set-up

Representative agent in country (i = H,F ) owns a project at t = 0.

At t = 1 project delivers yrain = (1 + ε) if s = {rain} and ysun = (1− ε)

if s = {sun}.

At t = 1, uncertainty is realized and agents consume according to a standard

CRRA utility:

u(c) =c1−σ

1− σ

Page 51: International Macroeconomics Sessions 7-8

Autarky

Agents consume the proceeds of their own project.

c = y(1 + ε) if s = {rain} and y(1− ε) if s = {sun}

In country i = H,F

E(ci) = 1; V ar(ci) =1

2

�(ysun − 1)

2 + (yrain − 1)2�= ε2

cov(ci, cj) = E((ci − 1)�cj − 1

�)

= pε2 − (1− p) ε2

= 2ε2(p−1

2)

Cross-country consumption correlation = correlation of output

Page 52: International Macroeconomics Sessions 7-8

Financial integration

Agent in country (i = H,F ) can sale shares of her project at price ps (number

of shares normalized to unity; share price identical across countries).

µ =number of shares bought in the other country (=number of shares sold to

the other country)

Consumption at t = 1 in country i �= j in state {si; sj} for a given portfolio µ

ci�si; sj

�= µyj,sj + (1− µ)yi,si

Portfolio maximization [can you guess the result?]:

maxµ

E0[c1−σ

1− σ]

Page 53: International Macroeconomics Sessions 7-8

[Technical steps towards the solution]

E0[c1−σ

1−σ ] =p2

�(1+ε)1−σ

1−σ+(1−ε)1−σ

1−σ�

+1−p2

�(µ(1+ε)+(1−µ)(1−ε))

1−σ

1−σ+(µ(1−ε)+(1−µ)(1+ε))

1−σ

1−σ�

E0[c1−σ

1−σ ] =p2

�(1+ε)1−σ

1−σ+(1−ε)1−σ

1−σ�

+1−p2

�(1−ε+2µε)

1−σ

1−σ+(1+ε−2µε)

1−σ

1−σ�

Page 54: International Macroeconomics Sessions 7-8

Financial integration

Portfolio maximization

Equivalent to (for p �= 1; why?):

maxµ[(1− ε+ 2µε)

1− σ

1−σ

+(1 + ε− 2µε)

1− σ

1−σ

]

⇒ 2ε(1− ε+ 2µε)−σ = 2ε(1 + ε− 2µε)−σ

⇒ µ =1

2(if ε �= 0; why?)

Portfolio which allows perfect pooling of country risk.

Portfolio fully diversified internationally (cf. Lucas (1982))

Page 55: International Macroeconomics Sessions 7-8

Financial integration

In country i = H,F

E(ci) = 1; V ar(ci) =p

2

�(ysun − 1)

2 + (yrain − 1)2�= pε2

As long as p < 1, volatility of consumption falls with respect ot autarky: welfaregains from risk sharing due to risk diversification (gains are higher when p islow).

Note that consumption is not constant (there is still world aggregate risk unlessp = 0).

cH = cF in all states

Perfect correlation of consumption across countries. In particular higher thanoutput correlation.

Page 56: International Macroeconomics Sessions 7-8

Welfare implications

Income smoothing across states provide positive welfare gains. Financial inte-

gration complete financial markets. How big are these gains?

Small if one looks at consumption and standard CRRA preferences (unless very

large coefficient of risk aversion). Similar to Lucas calculations about the gains

from removing business cycles.

But asset prices extremely volatile: welfare gains implied by asset prices usually

larger.

Still hard to reconcile both views (see Lewis (2000)).

Page 57: International Macroeconomics Sessions 7-8

Implications of financial integration and discussion of the evidence

1) Risk diversification lowers consumption volatility. Scarce evidence and small

effects but yes (see Bekaert et al. (2006)). Issue: also seems to increase the

probability of crisis.

2) Raises consumption correlation (and in particular above output correlation).

Consumption far to be perfectly correlated across countries in the data. Points

the lack of risk sharing but at least countries which exhibit higher degree of

integration have higher correlation of consumption (see Imbs (2006)).

3) Risk diversification implies full international portfolio diversification. Not true

in the data although international portfolio diversification has been increasing

over the last two decades. Investors still holds a disproportionate share of local

assets: Home bias in equities (French and Poterba (1991)).

Page 58: International Macroeconomics Sessions 7-8

The limits of financial integration

- Consumption correlation across countries quite low and lower than output for

most countries ("Quantity Puzzle"; see lectures 11-12)

- Home bias in equity puzzle

Investors tend to hold a disproportionate share of their local assets. Goes

against the view of a large decrease in barriers to international investments;

unless it is actually optimal to hold undiversified portfolios.

Note: Useful measure of Home Bias:

HB = 1− Share of Foreign of Equity HoldingsShare of Foreign Stocks in World Market Capitalisation . Why?

Page 59: International Macroeconomics Sessions 7-8
Page 60: International Macroeconomics Sessions 7-8

0.5

0.6

0.7

0.8

0.9

1

1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005

Europe

North America

Oceania

Japan

Home Bias (HB) across time for selected regions

Page 61: International Macroeconomics Sessions 7-8

Financial markets, risk diversification and growth

- International financial markets provide risk diversification (risk sharing).

- Saint Paul (1993) and Obstfeld (1994) go one step further: risk diversification

allows more risk taking towards more productive activities (specialization).

(see also Acemoglu and Fabrizio Zilibotti (1997))

- Financial integration improves the risk/return of savers

=⇒ risk taking/specialization

=⇒ growth effect of integration beyond standard neoclassical and risk-sharing

effects

Page 62: International Macroeconomics Sessions 7-8

Risk-taking and financial integration

adapted from Saint Paul (1993)

Set-up

One country (H) and 2 technologies of production (1 and 2)

2 states of the world (s = 1 or 2) with equal probabilities

2 periods: t = 0 et t = 1

Entrepreneurs have one unit of capital at t = 0

Production technologies are risky with constant return to scale

Page 63: International Macroeconomics Sessions 7-8

- technology 1 pays at t = 1 in state s = 1 (proba = 12) and gives R per unit

of capital invested at t = 0 (and gives 0 is state s = 2))

- technology 2 pays at t = 1 in state s = 2 (proba = 12) and gives r per unit

of capital invested at t = 0 (and gives 0 is state s = 1))

We assume r < R (H is more efficient in technology 1)

At t = 0, entrepreneurs invest their inital dotation in each technology (tech-

nological choice)

θ (resp. (1− θ)) = capital invested in technology 1 (resp. 2).

Page 64: International Macroeconomics Sessions 7-8

At t = 1, uncertainty is realized and entrepreneurs consume according to astandard CRRA utility:

u(c) =c1−σ

1− σ

1) Autarky

Technological choice

maxθ

E0[c1−σ

1− σ] = max

θ(1

2

(Rθ)

1− σ

1−σ

+1

2

(r(1− θ))

1− σ

1−σ

)

Optimal technological choice satisfies θ∗

θ∗

1− θ∗= (

r

R)1−

1σ ⇒ θ∗ =

( rR)1−1σ

1 + ( rR)1−1σ

Page 65: International Macroeconomics Sessions 7-8

Entrepreneurs invest in both production to diversify risk.

More in 1 if σ < 1 (the opposite if σ > 1). Very risk averse entrepreneurs

have a strong desire to smooth consumption across states⇒ invest more in the

low return technology

Consumption allocation across states

c∗1 = Rθ∗; c∗2 = r (1− θ∗)

cmoy =Rθ∗ + r (1− θ∗)

2

Specialization choice: trade off between volatility of consumption and average

level of consumption

Page 66: International Macroeconomics Sessions 7-8

2) Financial integration

Second country (F ) completely symmetric in all respects except:

- technology 1 pays at t = 1 in state s = 1 (proba = 12) and gives r per unit

of capital invested at t = 0 (and gives 0 is state s = 2))

- technology 2 pays at t = 1 in state s = 2 (proba = 12) and gives R per unit

of capital invested at t = 0 (and gives 0 is state s = 1))

F is more efficient in technology 2 (gains from specialization)

Page 67: International Macroeconomics Sessions 7-8

Entrepreneurs can buy and sell claims on future output (portfolio choice made

at t = 0) in international financial markets. Buying µ shares of firms in country

H gives right to a share µ of country H production at t = 1 (number of shares

normalized to unity). Idem for country F . Before trading claims, entrepreneurs

hold all the shares of the country.

Same technological choice as earlier. Once technological choice has been made,

entrepreneurs trade shares of their firms with foreigners.

We denote by µ the number of shares of country H held by entrepreneurs in

countryH (and (1−µ) the number of shares held in country F by entrepreneurs

in country H).

Page 68: International Macroeconomics Sessions 7-8

Portfolio choice for a given θ

Due to symmetry if country H chooses to invest θ in technology 1, country F

chooses to invest θ in technology 2

Portfolio choice maximization:

maxµ

E0[c1−σ

1− σ]

maxµ(1

2

(µRθ + (1− µ)r(1− θ))

1− σ

1−σ

+1

2

(µr(1− θ) + (1− µ)Rθ)

1− σ

1−σ

)

Page 69: International Macroeconomics Sessions 7-8

Portfolio choice for a given θ

FOC:

(Rθ − r(1− θ))�u′(c1)− u′(c2)

�= 0⇒ c1 = c2

Then:

µRθ + (1− µ)r(1− θ) = µr(1− θ) + (1− µ)Rθ ⇒ µ =1

2

Perfect pooling of risk.

Such a portfolio allows optimal risk diversification for any value of θ

Page 70: International Macroeconomics Sessions 7-8

Technological choice

Given optimal µ, expected utility of an entrepreneur is:

U(θ) =1

2

(Rθ+r(1−θ)

2 )

1− σ

1−σ

+1

2

(Rθ+r(1−θ)

2 )

1− σ

1−σ

=1

21−σ

((R− r) θ + r)

1− σ

1−σ

U(θ) ↑ with θ since R > r.

Efficient specialization requires θ∗ = 1.

Intuition?

Page 71: International Macroeconomics Sessions 7-8

Consumption allocation across states

Sharing of world output (perfect risk-sharing)

c∗1 =R

2; c∗2 =

R

2

cmoy =R

2

(i) Consumption is not risky anymore (despite higher specialization in each

country) = standard risk-sharing (intratemporal) gains.

(ii) Average consumption has increased due to efficient specialization

(iii) Volatility of output has increased.

Page 72: International Macroeconomics Sessions 7-8

Risk diversification, risk taking and growth: empirical evidence?

Very scarce, only indirect evidence but...

Kalemli-Ozcan„ Sorensen and Yosha (2003)

Hypothesis tested:

Two regions better integrated financially are more specialized as they can share

risks better.

Sample of non-EU OECD countries and regions within countries for EU, Canada,

US.

Page 73: International Macroeconomics Sessions 7-8

Two stages:

1) measure the degree of "lack of risk-sharing" (=sensitivity of incomes to local

output =β1) in a given region (i):

∆logPINCit� � incomes

= αt + β1ilogGDPit� � output

+ ǫit

Risk-sharing is measured by βKi = 1− β1i

2) investigates the impact of (βKi = 1− β1i) on regions specialization (under

the assumption that countries devote more ressources to sectors where they are

the most productive). Specialization Herfindahl Index at 2-digits ISIC category.

Page 74: International Macroeconomics Sessions 7-8
Page 75: International Macroeconomics Sessions 7-8

Empirical issues

Endogeneity: more specialization of countries can increase the need for financial

integration and risk sharing (reverse causality).

Use variables related to financial development (such as shareholder rights, the

size of the financial sector (relative to GDP), legal systems) as instruments for

the amount of risk sharing βKi.

Similar findings.

Page 76: International Macroeconomics Sessions 7-8

Risk diversification, risk taking and growth: empirical evidence?

Thesmar and Thoenig (2012)

Investigates the liberalization of Paris-Bourse over the period 1986-1990 on

risk-taking.

Liberalization made French firms where able to sell shares to diversified inter-

national investors

⇒ Significant increase in the volatility of cash-flows of listed firms (compared

to non-listed ones)

Page 77: International Macroeconomics Sessions 7-8
Page 78: International Macroeconomics Sessions 7-8
Page 79: International Macroeconomics Sessions 7-8
Page 80: International Macroeconomics Sessions 7-8

Risk diversification, risk taking and growth: empirical evidence?

Kalemli-Ozcan, Sorensen. and Volosovych (2010)

Similar evidence: Firms with more diversified (international ownership) are more

volatile sales growth and operating revenues.

Large sample of firms in Europe (AMADEUS) over 1996-2006. 16 countries

Important additional finding: result survives when ’aggregating up’ at the

macro-level (regional level). Not obvious à priori, why?

Control as much as possible for reverse causality by controlling for firm FE and

also using IV (’exogenous’ harmonization of financial regulation between EU

countries and ’trust’).

Page 81: International Macroeconomics Sessions 7-8

Cross-sectional regressions

Firm i in region j in country c and sector s

log(V OLijc) = µc + µs + α log(1 + FOijc) + δXijc + εijc

V OLijc = average measure of firm-level volatility

FOijc = % of foreign ownership (also use dummies when largest shareholder

is foreign)

µc, µs country and sector dummies, Xijc set of control variables

Page 82: International Macroeconomics Sessions 7-8
Page 83: International Macroeconomics Sessions 7-8
Page 84: International Macroeconomics Sessions 7-8

Panel regressions

Firm i in region j in country c, sector s and date t

log(V OLijct) = µi+µt+µc.µt+µs.µt+α log(1+FOijct)+δXijct+εijct

V OLijct = time varying measure of firm-level volatility

FOijc = % of foreign ownership

µc, µs country and sector dummies, Xijc set of control variables

Page 85: International Macroeconomics Sessions 7-8
Page 86: International Macroeconomics Sessions 7-8

Aggregating up at the regional level

Aggregate volatility of sales/operating revenues at the regional level

Aggregate foreign ownership at the regional level (∼100 regions)

FIj =�

i

ωijFOijc

with ωij =weight of firm i in region j

Compute also median variables in the region. Same results.

log(V OLaggjct ) = µj + µt + µc.µt + α log(1 + FI)jct + δXjct + εjct

Page 87: International Macroeconomics Sessions 7-8
Page 88: International Macroeconomics Sessions 7-8
Page 89: International Macroeconomics Sessions 7-8