firm heterogeneity and trade - altervista · comparison of models: assumptions ricardo hos krugman...
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Firm heterogeneity and trade
Giovanni Marin
Department of Economics, Society, Politics
Università degli Studi di Urbino ‘Carlo Bo’
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References for this lecture
• BBGV Chapter 4
– Paragraphs 4.7, 4.8
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Comparison of models: Assumptions
Ricardo HOS Krugman
Production factors 1 2 -
Within-country mobility of inputs
Yes Yes Yes
Between-country mobility of inputs
No No No
Technology / productivity Heterogeneous Homogeneous Homogeneous
Relative factors’ endowment - Heterogeneous -
Trade frictions No No No
Returns to scale Constant Constant Increasing
Commodities Homogeneous Homogeneous Heterogeneous
(varieties)
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Comparison of models Predictions of the model
Ricardo HOS Krugman
Inter-industry trade Yes Yes -
Intra-industry trade No No Yes
Full specialization Yes Not necessarily Yes (in varieties)
Commodity price equalization Yes Yes -
Factor(s) price equalization No Yes -
Trade is mutually beneficial Yes Yes Yes
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Trade and firm dynamics
• The model of trade with monopolistic competition predicts a ‘competition effect’
• Some firms exit the market and the remaining firms gain market shares
• The basic model, however, is based on the assumption of identical firms (except for the variety they produce)
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Firm heterogeneity in labour productivity (in log)
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0.2
.4.6
.8
De
nsity
8 10 12 14log(Value added per employee)
Firms in the chemical sector in Italy Year 2011 Source: AIDA
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Firm heterogeneity and trade
• Only few firms import or export
• Also within sectors in which a country has comparative advantage (or is well endowed with the intensive factor), only a selection of firms actually exports
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Figure 4.8 Export orientation of US manufacturing firms, 2002
Export orientation of US manufacturing firms, 2002
0 5 10 15 20 25 30 35 40
Miscellaneous Manufacturing
Printing and Related Support
Furniture and Related Product
Apparel Manufacturing
Wood Product Manufacturing
Nonmetallic Mineral Product
Food Manufacturing
Textile Product Mills
Fabricated Metal Product
Petroleum and Coal Products
Beverage and Tobacco Product
Leather and Allied Product
Paper Manufacturing
Textile Mills
Plastics and Rubber Products
Transportation Equipment
Primary Metal Manufacturing
Machinery Manufacturing
Chemical Manufacturing
Computer and Electronic Product
Electrical Equipment Appliance
percent of firms that export
Average for US
manufacturing
Source: van Marrewijk (2012), based on Bernard et al. (2007, Table 2).
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Firm heterogeneity and trade
• As only few firms actually trade, it is important to understand which are the characteristics of these firms
• Are these firms larger? Are they more ‘efficient’? Are they more productive? Are they more technologically-endowed?
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Firm heterogeneity (Italy)
Exporter premia (%)
Size (employees) 69.5 Labour productivity (VA per employee) 11.4 Capital stock per employee 18.9 Share of graduates 23.5 Probability of doing R&D 17 Probability of adopting a product innovation 14.4 Probability of adopting a process innovation 9.7 Probability of applying for a patent 4.2 Probability of doing FDI 1.9
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Italian manufacturing firms. Sector and year dummies included. Source: Mediocredito Centrale, years 1995-2007
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Firm heterogeneity (US)
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Table 4.3 Exporter premia in US manufacturing, 2002
Exporter premia (%)
Employment 164
Shipments 194
Value-added per worker 12
TFP – total factor productivity 3
Wage 6
Capital per worker 13
Skill per worker 12
Additional covariates Industry fixed effects
Source: based on Bernard et al. (2007, Table 3); all results are significant at the 1 percent level.
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Firm heterogeneity
• Exporting firms are:
– Larger
– More capital intensive
– With a more skilled labour force
– More productive
– More innovative
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Figure 4.9 Distribution by number of products and export destinations; USA, 2000
1 2 3 4 5+
12
34
5+
11.9
40.4
0
20
40
60
80
100
Sh
are
of e
xp
ort
ing
fir
ms
# countries
# products
a. Share of exporting firms
1 2 3 4 5+
12
34
5+
92.2
0
20
40
60
80
100
Sh
are
of e
xp
ort
va
lue
# countries
# products
b. Share of export value
Source: van Marrewijk (2012), based on data from Bernard et al. (2007, Table 4).
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Heterogeneity between exporting firms
• Almost half (40.4) of US exporting firms just export one product to just one country
• Firms that export five or more products to five or more countries account for 92.2 percent of total export
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Figure 4.10 Simultaneous exporting and importing; US manufacturing, 1997
US manufacturing; exporting and importing per sector
0
10
20
30
40
50
60
70
0 10 20 30 40 50 60 70
percent of firms that export
perc
ent
of
firm
s t
hat
import
Aggregate Manufacturing average
diagonal
regression line
Computer and
Electronic Product
Printing and Related Support
Leather and
Allied Product
Source: van Marrewijk (2012, based on data from Bernard et al. (2007, Table 7).
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Import and export
• There exist a positive correlation between exporting and importing
• 41 percent of the exporting firms also import
• 79 percent of importers also export
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Trade and selection
• For a given demand and market structure, firms with higher marginal costs make less profits than firms with lower marginal costs
• If profits are below zero (due to too high marginal costs), the firm exits the market
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q3 profit
demand
mr
c1
c2
c3
p1
p2
q2 q1 quantity
price, mc, mr mc
p3 (p3-c3)q3
(p2-c2)q2
(p1-c1)q1
(p1-c1)q1
(p2-c2)q2
E1
E2
E3
Figure 4.11 Firm heterogeneity, prices, and profits
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profit
demand before trade
quantity
price mc
firms exit
firms make lower profits
firms make higher profits
demand after trade
c3
c4
c5
profit before trade
profit after trade
Figure 4.12 Firm heterogeneity and trade
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Trade and selection
• Trade induce a counterclock wise rotation of the demand curve demand becomes more elastic
• As we will see in the coming lectures, firms that engage in trade need to incur in a series of fixed costs of exporting only firms with a sufficiently high productivity can bear the fixed cost of exporting – Least productive firms will exit the market – Firms with intermediate productivity will remain on the market
but cannot bear the fixed cost of exporting – Firms with high productivity will increase their market share
and also export
• Doing FDI is even more ‘costly’ further selection
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Trade and selection
• Trade induce a counterclock wise rotation of the demand curve demand becomes more elastic
• As we will see in the coming classes, firms that engage in trade need to incur in a series of fixed costs of exporting only firms with a sufficiently high productivity can bear the fixed cost of exporting – Least productive firms will exit the market – Firms with intermediate productivity remain on the market but
cannot bear the fixed cost of exporting – Firms with high productivity increase their market share and
also export
• Doing FDI is even more ‘costly’ further selection
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Exporter premia (%)
FDI premia (%)
Size (employees) 69.5 164.0 Labour productivity (VA per employee) 11.4 11.1 Capital stock per employee 18.9 22.4 Share of graduates 23.5 23.4 Probability of doing R&D 17 29.5 Probability of adopting a product innovation 14.4 24.3 Probability of adopting a process innovation 9.7 16.3 Probability of applying for a patent 4.2 11.4 Probability of doing FDI 1.9 - Probability of exporting - 20.7
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0.2
.4.6
.81
-2 -1 0 1 2
No FDI and no export Export
FDI
Italian manufacturing firms. Labour productivity partialled out of sector and year dummies. Source: Mediocredito Centrale, years 1995-2007