University of Verona A regional version of Mirage model and a trade policy simulation PhD Student Gabriele Standardi Doctorate in Economics & Finance XXI Cycle September 8 2008
Dec 17, 2015
University of Verona
A regional version of Mirage model and a trade policy
simulation
PhD Student Gabriele Standardi
Doctorate in Economics & Finance
XXI Cycle
September 8 2008
• Baseline of Mirage model
• Regional Model
• Trade policy simulation
Mirage model
Database
Mirage stands for Modelling International Relationship in Applied General Equilibrium
Mirage is a multi-region, multi-sector computable general equilibrium model, developed by CEPII (Centre d’études prospectives et d’informations internationales) and devoted to trade policy analysis
Mirage uses the GTAP 6.x databaseSAM for 87 countries or regions and 57 sectors with 5 production factors (capital, skilled labour , unskilled labour, land and natural resources)
Trade barriers are described by MacMap database, (developed by CEPII) « ad valorem » tariffs at the bilateral level for 137 countries
Mirage Model
Mirage Structure
• The demand side
• The supply side
• Imperfect competition
• Capital, investment and macroeconomic closure
• Labour market
• Dynamic set-up
The demand side
Each region has a representative agent, whose utility function is static
Saving rate is exogenous
Total demand is made up of final consumption, intermediate consumption and capital goods
Product differentiation according to geographical origin (the so-called Armington assumption)
The regional representative agent includes the government, he therefore pays and earns taxes, so the public budget constraint is implicit to meeting the representative agent’s budget constraints.
Mirage structure
The supply side
5 production factors:skilled labour (H), unskilled labour (L), capital (K), land (TE), natural resources (RN)
Factor endowments are assumed to be fully employed Their growth rates are exogenous for natural resources (set at zero) and for labour based on demographic forecast provided by World Bank
Land supply: CET function that takes account of land’s imperfect mobility across uses
Capital supply : putty-clay hypothesis
Unskilled labour supply and skilled labour supply are perfectly mobile across sectors
Production : Leontief function between the value added (VA) and the intermediate consumption (Cnter)Value added : CES function of land, natural resources, unskilled labour and a CES bundle of capital and skilled labour (fictive factor Q)
Mirage structure
Imperfect competition
Horizontal differentiation of products and increasing returns to scale
Firms compete in a Cournot-Nash way
Mirage structure
Mirage structure
Capital, investment and macroeconomic closure
In many models , among which the GTAP one, international financial flows result from the assumption of perfect capital mobility across countries and sectors. This modelling is micro-founded, but it induces unplausibly high cross-border flows. On the other hand, directly using the results of econometric estimates would give more realistic results, but it would lack theoretical consistency.
So installed capital is assumed immobile across sectors and regions (putty-clay hypothesis) and the investment become the only adjustment device for capital stock. The investment can vary across sectors and regions. This modelling is a good compromise between theoretical consistency and empirical realism. The domestic investment’s setting is consistent with FDI’s one and it depends on FDI determinants, such as market size, growth rate or market potential, that influence the rate of return to capital.
Mirage structure
Labour market
Introduction of the Lewis hypothesis to take account of unskilled workers flows between urban areas and rural areas: useful to study the employment dynamic in some developing countries
Mirage structure
Dynamic set-up
The Mirage dynamic set-up takes place through the investment, the rate growth of production factors and the technological progress (exogenous).
Regional Model
Objective: analysing trade policy effects on the different regions of Europe
Regional Model Structure
• Micro-regions and macro-regions
• Sectors
• Demand side
• Supply side
• Imperfect competition
• Capital, investment, macroeconomic closure and dynamic set-up
• Labour market
Regional Model
Regional Model Structure
Macro-regional levelThree macro-regions EU15 France, Germany, Belgium, Luxembourg, Netherlands, United Kingdom, Italy, Ireland, Denmark, Spain, Portugal, Greece, Finland, Sweden, AustriaNMB rest of EuropeROW rest of the world
Micro-regional levelNine micro-regions
EU15 is made up of 5 micro-regions:DEU Germany, Austria FRA France, Belgium, Luxembourg, NetherlandSCD Denmark, Finland, SwedenENG United Kingdom, IrelandMED Italy, Spain, Portugal, Greece
ROW is made up of 3 micro-regions:OEC Australia, New Zealand, Japan, South Korea, Canada, Mexico, Turkey, Switzerland, Rest of EFTAUSAROW Rest of macro-region ROW
NMB remains the same set: NMB Bulgaria, Cyprus, Czech Republic, Hungary, Malta, Poland, Romania, Slovakia, Estonia, Lithuania, Latvia, Slovenia
USAROW (Reste du macro région ROW) EU15 est divise en :DEU Allemagne, Autriche FRA France, Belgique, Luxembourg, Pays BasSCD Danemark, Finlande, SuèdeENG Royaume Uni, IrlandeMED Italie, Espagne, Portugal, Grèce NMB reste le même ensemble : NMB (Bulgarie, Cipre, République Tchèque, Hongrie, Malte, Pologne, Roumanie, Slovaquie, Estonie, Lituanie, Lettonie, Slovénie).
Regional Model Structure
4 Sectors AGM AgriculturePRM Primary products IND Manufactures SERV Services
USAROW (Reste du macro région ROW) EU15 est divise en :DEU Allemagne, Autriche FRA France, Belgique, Luxembourg, Pays BasSCD Danemark, Finlande, SuèdeENG Royaume Uni, IrlandeMED Italie, Espagne, Portugal, Grèce NMB reste le même ensemble : NMB (Bulgarie, Cipre, République Tchèque, Hongrie, Malte, Pologne, Roumanie, Slovaquie, Estonie, Lituanie, Lettonie, Slovénie).
Regional Model Structure
Demand
The structure of demand side remains exactly the same, defined at macro-regional level
Regional Model Structure
Supply side
The most important change with respect to Mirage: production is specified at micro-regional level
5 production factors:skilled labour (H), unskilled labour (L), capital (K), land (TE), natural resources (RN)
Factor endowments are assumed to be fully employed
Simplification with respect to Mirage : land supply is exogenous (there is indeed only one agricultural sector, so the CET function for land is useless)
The supply of factors is at micro-regional level except capital supply that is at macro-regional level: capital is perfectly mobile across the different micro-regions of the same macro-region
All the factors are perfectly mobile across sectors except natural resources
Regional Model Structure
Imperfect competition
Removal of the imperfect competition hypothesis
Regional Model Structure
Capital, investment, macroeconomic closure and dynamic set-up Removal of putty-clay hypothesis : the installed capital in each sector and in each micro-region is not immobile, but determined by the FOCs for profit maximization with respect to capital
No dynamic
Regional Model Structure
Labour market
Removal of Lewis hypothesis
Introduction of the hypothesis of unskilled labour imperfect mobility across the micro-regions of the same macro-region on the basis of relative wages (implicit emigration cost)
Unskilled labour supply: macro-regional wage income’s maximisation subject to a CET constraint
Trade policy simulation
Shock definition
Bilateral shock: Eu15 and the rest of Europe (NMB) suppress their tariff barriers in all the sectors toward the rest of the world (ROW) and the rest of the world does the same thing toward EU15 and the rest of Europe (NMB)
Trade policy simulation
ROW EU15 NMBAGM ROW 0,1473329AGM EU15 0,1036747AGM NMB 0,0495082 0,0610791PRM ROW 0,0164278PRM EU15PRM NMB 0,0087803IND ROW 0,0510492IND EU15 0,0338301IND NMB 0,0076003 0,0396776
ROW EU15 NMBAGM ROW 0,1473329 0,0526993 0,0565393AGM EU15 0,1069915 0,1036747AGM NMB 0,1268727 0,0495082 0,0610791PRM ROW 0,0164278 0,001957PRM EU15PRM NMB 0,0030439 0,0087803IND ROW 0,0510492 0,0282547 0,0685235IND EU15 0,0609952 0,0338301IND NMB 0,0696799 0,0076003 0,0396776
Tariff barriers before the shock
Tariff barriers after the shock
Trade policy simulation
ROW USA OEC totAGM 0,15% 0,38% 0,24% 0,20%PRM -0,04% -0,17% 0,09% -0,04%IND -0,53% -5,55% 5,52% -0,17%SERV 0,10% 1,09% -1,72% 0,10%
FRA DEU SCD ENG MED totAGM 0,03% 0,17% -0,28% 0,18% -0,05% 0,02%PRM -4,08% -3,44% -3,64% -3,57% -3,03% -3,61%IND 7,31% -3,58% 3,51% -7,55% 7,32% 1,39%
SERV -2,59% 1,96% -1,20% 2,35% -2,42% -0,26%
NMB totAGM 0,10% 0,10%PRM -2,40% -2,40%IND 0,61% 0,61%
SERV -0,35% -0,35%
Production with unskilled labour immobility ( = 0)
Trade policy simulation
Production value at the reference year (2001) for each micro-region and for each sector with respect to factor and intermediate consumption
ROW NMB USA FRA DEU OEC SCD ENG MEDL 18,13% 13,45% 24,92% 16,27% 15,33% 22,96% 20,60% 19,78% 16,27%K 26,17% 24,20% 17,33% 29,15% 29,31% 24,47% 18,91% 20,87% 31,39%H 11,40% 9,06% 20,22% 13,63% 11,90% 14,51% 17,83% 16,29% 14,28%
Cnter 44,30% 53,29% 37,53% 40,95% 43,46% 38,07% 42,66% 43,06% 38,05%
Services
Manufactures
ROW NMB USA FRA DEU OEC SCD ENG MEDL 9,36% 10,61% 15,66% 12,86% 16,06% 10,45% 14,08% 16,40% 11,86%K 14,04% 11,70% 11,06% 11,96% 9,10% 15,99% 12,18% 13,07% 14,11%H 2,07% 2,28% 8,81% 5,73% 7,76% 5,18% 6,81% 7,60% 5,19%
Cnter 74,52% 75,40% 64,46% 69,45% 67,08% 68,38% 66,93% 62,92% 68,85%
Trade policy simulation
Production value at the reference year (2001) for each micro-region and for each sector with respect to factor and intermediate consumption
Primary products
Agriculture
ROW NMB USA FRA DEU OEC SCD ENG MEDL 27,02% 16,55% 15,26% 27,23% 25,97% 22,61% 19,52% 25,80% 30,89%K 12,29% 5,67% 14,79% 12,27% 10,58% 16,79% 22,65% 14,09% 12,88%H 0,48% 0,42% 1,80% 2,38% 2,15% 0,99% 1,88% 2,10% 2,55%TE 12,78% 9,57% 14,70% 4,34% 5,84% 10,88% 4,36% 5,24% 3,78%RN 2,34% 1,21% 1,18% 1,21% 2,92% 2,95% 4,37% 2,01% 5,43%
Cnter 45,09% 66,57% 52,26% 52,56% 52,54% 45,79% 47,21% 50,77% 44,47%
ROW NMB USA FRA DEU OEC SCD ENG MEDL 5,35% 19,33% 9,14% 0,64% 16,80% 4,21% 1,28% 2,85% 10,88%K 37,79% 11,27% 26,29% 60,15% 8,60% 25,43% 33,18% 35,04% 19,95%H 1,03% 1,62% 4,20% 1,20% 7,54% 1,80% 2,14% 3,53% 6,49%
RN 24,71% 22,49% 24,51% 27,02% 23,09% 22,54% 23,75% 24,94% 23,56%Cnter 31,12% 45,29% 35,86% 11,00% 43,97% 46,00% 39,65% 33,63% 39,13%
Trade policy simulation
FRA DEU SCD ENG MED totAGM 2,36% 1,19% 2,34% 1,73% -0,32% 1,09%PRM -3,20% -4,47% -2,90% -2,98% -3,50% -3,25%IND 32,54% -9,15% -6,43% -43,71% 19,85% 1,95%
SERV -8,78% 4,02% 1,66% 10,67% -4,94% 0,10%
ROW USA OEC totAGM 0,09% 0,63% 0,41% 0,23%PRM -0,24% -0,24% -0,04% -0,21%IND -2,51% -9,00% 11,14% -0,17%
SERV 0,54% 1,62% -2,98% 0,11%
NMB totAGM 0,20% 0,20%PRM -2,53% -2,53%IND 0,57% 0,57%
SERV -0,34% -0,34%
Production with unskilled labour mobility ( = 10)
Trade policy simulation
Production, manufactures (with respect to different values of )
-50%
-40%
-30%
-20%
-10%
0%
10%
20%
30%
40%
0,00 2,5 5,00 7,50 10,00
sigma
var%FRA
ENG
Trade policy simulation
Amplification effect with unskilled labour mobility
No mobility of unskilled labour in the macro-region (σ = 0) Unskilled labour supply doesn’t change with respect to the reference year after the shock Mobility of unskilled labour in the macro-region (σ = 10) Unskilled labour supply changes with respect to the reference year after the shock
1,3 51,38
1,02 51,30
FRAFRAS
ENG ENGS
Lw
w L
1,02 53,46
1,01 48,87
FRAFRAS
ENG ENGS
Lw
w L
ROW EU15 NMBAGM 0,27% 2,49% 2,20%PRM 0,27% 2,49% 2,20%IND 0,27% 2,49% 2,20%
SERV 0,27% 2,49% 2,20%
ROW NMB USA FRA DEU OEC SCD ENG MEDAGM 0,70% 1,88% 1,01% 2,12% 2,16% 0,82% 1,91% 2,15% 2,00%
Trade policy simulation
Change in factor prices and intermediate consumption prices ( = 0)
Capital
Unskilled labour
Land
ROW NMB USA FRA DEU OEC SCD ENG MED0.41% 1,95% 0.41% 2.81% 2,10% 2.25% 2.37% 2.11% 2.67%
ROW NMB USA FRA DEU OEC SCD ENG MEDAGM 0,01% 0,86% -0,03% 1,33% 1,37% -0,03% 1,47% 1,36% 1,40%PRM -0,06% 0,81% -0,07% 1,43% 1,66% -0,04% 1,83% 1,60% 1,46%IND -0,12% 0,73% -0,12% 1,32% 1,38% -0,14% 1,30% 1,34% 1,31%
SERV -0,08% 1,14% -0,01% 1,74% 1,78% -0,04% 1,75% 1,81% 1,69%
Trade policy simulation
Change in factor prices and intermediate consumption prices ( = 0)
Intermediate consumption
ROW NMB USA FRA DEU OEC SCD ENG MED0,15% 2,01% 0,21% 1,64% 2,74% -0,22% 2,13% 2,95% 1,60%
Skilled labour
ROW NMB USA FRA DEU OEC SCD ENG MEDAGM 0,77% 1,91% 1,12% 2,62% 2,70% 0,90% 2,09% 2,70% 2,30%PRM 0,26% -1,93% 0,18% -2,95% -2,91% 0,47% -3,09% -2,78% -2,29%
Natural resources
ROW EU15 NMBAGM -0,20% 0,66% 0,24%PRM -0,17% 0,86% 0,52%IND 0,03% 0,60% 0,38%
SERV -0,12% 0,19% -0,05%
Trade policy simulation
Change in welfare measured in terms of consumption ( = 0)
Change in imports ( = 0)
ROW EU15 NMBAGM 2,7% 12,0% 10,9%PRM -1,3% 3,8% 2,4%IND 4,8% 6,9% 6,8%
SERV -2,7% 3,6% 1,6%
Further objectives of the regional version of Mirage model:
analysing trade policy effects on the different regions for each European nation (for example for Italy, Lombardia, Veneto, Lazio, etc..) in order to implement accurate support policies to the most penalized sectors and regions