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№1 слайд
International Trade Theory
Содержание слайда: International Trade: Theory and Policy Lecture 9 November, 2016 Instructor: Natalia Davidson Lecture is prepared by Prof. Sergey Kadochnikov, Natalia Davidson

№2 слайд
Topic . International trade
Содержание слайда: Topic 7. International trade under increasing returns to scale and imperfect competition on the markets. Lecture 9 7.1. New approaches to the analysis of international trade under increasing returns to scale and imperfect competition. General equilibrium in closed economy under increasing returns to scale and imperfect competition on the markets. 7.2. International trade under increasing returns to scale: - external economies to scale; -internal economies to scale. 7.3. A model with external economies to scale. Lecture 10 7.4. Monopolistic competition, returns to scale and international trade. 7.5. Models with heterogeneous firms (including the model by Marc Melitz (2003); models of choice between export and foreign direct investment). 7.6. Dumping. The structure and normative effects of international trade in ‘large’ economy under imperfect competition on the markets: the case of international oligopoly.

№3 слайд
. . Contemporary issues of
Содержание слайда: (7.1.) Contemporary issues of international trade: increasing returns to scale and imperfect competition - 1 Which trends of the world economy can’t be explained using the concept of comparative advantages? Large volumes of international trade between very similar countries (for example, inside the group of industrially developed countries: USA, Canada, Japan, European Union countries); Large volumes of intra-industry trade (for example, automobile industry)

№4 слайд
Indicators of comparative
Содержание слайда: Indicators of comparative economic advantages RCAIij (1) for USA, 2003-2007 Revealed comparative advantage index (method 1): RCAIij (1) = (Expij/Expwj) / (Expi/Expw)

№5 слайд
. . Contemporary issues of
Содержание слайда: (7.1.) Contemporary issues of international trade: increasing returns to scale and imperfect competition - 2 International trade in case when countries have no comparative advantages (no difference in equilibrium prices in autarky); Imperfect competition on the markets (monopoly, oligopoly, monopolistic competition) – its impact on the international trade; The level of product differentiation * (non-homogeneity) – its impact on the international trade; Increasing returns to scale in production – its impact on the international trade.

№6 слайд
. . Researchers in the field
Содержание слайда: (7.1.) Researchers in the field of International Economics P. Krugman, Princeton University, USA; E. Helpman, MIT, USA; Jerusalem University, Israel; G. Grossman, USA; W. Ethier, University of Pennsylvania, USA; J. Brander, Canada; B. Spencer, Canada; J. Markusen, USA; E. Venables, London School of Economics, Great Britain; A. Dixit, USA; etc.

№7 слайд
. . What are trade volumes
Содержание слайда: (7.1.) What are trade volumes between relatively similar countries? Volumes of export between developed and developing countries (% from total trade volume between these countries, 1985)

№8 слайд
. . What are the volumes of
Содержание слайда: (7.1.) What are the volumes of intra-industry trade? Grubel-Lloyd index of intra-industry trade (Grubel and Lloyd, 1975)

№9 слайд
. . What are the volumes of
Содержание слайда: (7.1.) What are the volumes of intra-industry trade? Grubel-Lloyd index of intra-industry trade (Grubel and Lloyd, 1975)

№10 слайд
. . Intra-industry trade
Содержание слайда: (7.1.) Intra-industry trade Grubel-Lloyd index: different aggregation levels Source: calculations by Charles van Marrewijk, Erasmus University Rotterdam based on data by United Nations (2006) COMTRADE , World Integrated Trade Solution (WITS), Geneva (Princeton University Press), http://www2.econ.uu.nl/users/marrewijk/pdf/marrewijk/Intra%20Industry%20Trade.pdf

№11 слайд
. . General equilibrium of
Содержание слайда: (7.1.) General equilibrium of closed economy under increasing returns to scale and imperfect competition in the markets The concept of distortions in production sectors and on the markets: Case 1: the producers’ revenue is not maximized under the given prices; Case 2: consumers’ utility is not maximized under the given prices; Case 3: the absence of unique market equilibrium; Overall: price signals are not valid when there are distortions; ‘quantitative’ signals become important

№12 слайд
. . General equilibrium of
Содержание слайда: (7.1.) General equilibrium of closed economy under increasing returns to scale and imperfect competition in the markets Specific features of general equilibrium in closed economy (autarky) under imperfect competition on one of the markets: graphical illustration Example: monopoly on one of the markets The diagram of partial equilibrium on the monopolistic market The diagram of production possibility curve and indifference curves __________________________________________________________ See Вэриан (1997), гл. 23 «Монополия» / H. Varian. A chapter on Monopoly. Krugman, P., Obstfeld, M. and M. Melitz (2011) International Economics: theory and policy (9th edition). – Pearson. – Ch. 8

№13 слайд
. . General equilibrium of
Содержание слайда: (7.1.) General equilibrium of closed economy under increasing returns to scale and imperfect competition in the markets

№14 слайд
. Returns to scale and
Содержание слайда: (7.2) Returns to scale and international trade. External and internal returns to scale. The models of comparative advantage: constant returns to scale The models with monopolistic competition: increasing returns to scale (internal) Internal returns to scale: returns to the size of a firm External economies of scale/agglomeration effects: on the industry or city level Localization effects (эффекты от специализации/локализации) – generated by firms belonging to the same industry and located closely (Alfred Marshall, 1920) Diversity effects (эффекты от разнообразия/диверсификации) – generated by firms belonging to different industries and located closely (Jane Jacobs, 1969) ________________________________________________________________ Krugman, P., Obstfeld, M. and M. Melitz (2011) International Economics: theory and policy (9th edition). – Pearson. – Ch. 7-8

№15 слайд
. Agglomeration has two types
Содержание слайда: (7.2) Agglomeration has two types in the industrial dimension Each segment on the graph represents a share of a particular industry in a city

№16 слайд
. Microfoundations of
Содержание слайда: (7.2) Microfoundations of external economies of scale - sources of agglomeration economies Based on classification by Alfred Marshall (A. Marshall. Principles of Economics. London: MacMillan, 1920 - in Duranton, Puga, 2004) Sharing/Specialized suppliers (совместное использование ресурсов) – firms reduce their cost by sharing common resource (infrastructure) Matching/Labour market pooling (поиск работников на рынке труда)– firms can find exactly what they need (workers) Learning/Knowledge spillovers (обмен знаниями/технологиями) – firms use knowledge of others “for free” Case study: Annalee Saxenian. Regional Advantage. Cambridge: Harvard University Press, 1994. [Comparison of California’s Silicon Valley and Boston’s Route 128.] ______________________________________________________________ Krugman, P., Obstfeld, M. and M. Melitz (2011) International Economics: theory and policy (9th edition). – Pearson. – Ch. 7.

№17 слайд
. Dynamic increasing returns
Содержание слайда: (7.2) Dynamic increasing returns and external returns

№18 слайд
. External returns to scale
Содержание слайда: (7.2) External returns to scale Life cycle theory (Vernon, 1960) Young industries: benefit from diversity Mature industries: benefit from localization (specialization) Empirical evidence Doubling of city size -> increase in productivity by 3-8% (US data, Rosenthal and Strange, 2004) ‘Centre’ vs. ‘periphery’ -> increase in productivity by 20-50% (Okubo, Tomiura, 2010) Evidence for Russia (based on data for 2005-2006) Doubling city size -> increase in productivity by 5% (‘Predpriyatiya i rynki’, 2010) Plants in urban agglomerations have 17-21% higher labor productivity (Gonchar and Ratnikova, 2014).

№19 слайд
Содержание слайда:

№20 слайд
. . International trade under
Содержание слайда: (7.3.) International trade under external economies to scale: structure of the model External and internal economies to scale and their impact on the market structure; Structure of the world economy: 2 countries (h, f); All final goods are tradable; Production factors are immobile between the countries. Structure of the production sector: 2 industries that produce 2 final homogeneous goods (X, Y); 2 homogeneous, non-specific resources (K, L), mobile between industries; Countries do not differ in absolute endowment of production factors; Specific features of the production technology: External economies to scale; Technologies may differ among the industries but not among the countries; the technologies in production of good X and good Y are characterized by the same levels of IRS. Structure of the household sector : Tastes are identical and homogeneous among the households and the countries. Market structure: Perfect competition on the markets of production factors and of final goods.

№21 слайд
. . The model of
Содержание слайда: (7.3.) The model of International trade under external economies to scale: exogenous parameters (1) Exogenous parameters of the model: Production technologies - production functions: Хh = fxh(Qxh, Kxh, Lxh) = Qxh KxhLxh(1-); Yh = fyh(Qyh, Kyh, Lyh) = QyhKxhLxh(1- ); Хf = fxf(Qxf, Kxf, Lxf) = QxfKxfLxf(1-); Yf = fyf(Qyf, Kyf, Lyf) = QyfKxfLxf(1- ); where  =  > 1, =. Resource endowment in each economy: Kh, Kf, Lh, Lf; Preferences of representative household in each of the economies – utility functions: Ui = Ui (Xi, Yi); i = h, f; Market structure on the final goods markets – perfect competition. Market structure on the resource market – perfect competition.

№22 слайд
. . The model of
Содержание слайда: (7.3.) The model of International trade under external economies to scale: endogenous parameters (2) Endogenous parameters of the model: Equilibrium production and consumption of final goods in closed economies – Xha, Yha, Xfa, Yfa; Equilibrium price ratios for final goods in closed economies – Pxha/Pyha, Pxfa/Pyfa; Equilibrium production of final goods in the open economy – Xph*, Yph*, Xpf*, Ypf*; Equilibrium consumption of final goods in the open economy – Xсh*, Yсh*, Xсf*, Yсf*; Import and export of the countries: If (Xc*-Xp*)>0 or (Yc*-Yp*)>0 – the good is imported; If (Xc*-Xp*)<0 or (Yc*-Yp*)<0 – the good is exported; Equilibrium world price ratio for final goods – Px*/Py*.

№23 слайд
. . The model of
Содержание слайда: (7.3.) The model of International trade under external economies to scale: characteristics of general equilibrium Characteristics of equilibrium conditions in closed economy: In each country, standard conditions of general equilibrium under perfect competition on the markets are the following: Producer optimization: MRTha=Pxhа/Pyhа, MRTfa=Pxfа/Pyfа; Consumer optimization: MRSha=Pxhа/Pyhа, MRSfa=Pxfа/Pyfа; Market clearing in the final goods markets: Xchа=Xphа, Ychа=Yphа, Xcfа=Xpfа, Ycfа=Ypfа. There is no difference in price ratios of closed economies (there is no comparative advantage): Pxfа/Pyfа=Pxhа/Pyhа. Graphical illustration: Markusen, Ch. 12

№24 слайд
. . The model of
Содержание слайда: (7.3.) The model of International trade under external economies to scale: characteristics of general equilibrium Characteristics of equilibrium conditions in open economy: Equilibrium conditions for economy f: MRTf*  Px*/Py* = MRSf*; Equilibrium conditions for economy h: MRTh*  Px*/Py* = MRSh*; Trade balance for two economies: (Px*/Py*) (Xcf*-Xpf*) + (Ycf*-Ypf*) = 0; (Px*/Py*) (Xch*-Xph*) + (Ych*-Yph*) = 0. Market clearing on the markets of goods X and Y: Xcf*+Xсh* = Xpf*+Xph*; Ycf*+Yсh* = Ypf*+Yph*. Graphical illustration: Markusen, Ch. 12

№25 слайд
. . The model of
Содержание слайда: (7.3.) The model of International trade under external economies to scale: characteristics of general equilibrium

№26 слайд
. . The model of
Содержание слайда: (7.3.) The model of International trade under external economies to scale: the main positive and normative results Structure of international trade in the model: International trade exists in the absence of comparative advantages in the countries; Each country fully specializes in production of one of the goods. A specific variant of specialization depends on the ‘first move advantage'; Inter-industry nature of international trade, the same as in the models with comparative advantages; International trade occurs because of the opportunity of economies to scale under conditions of deep specialization and a broader market (world market). The main normative results in the model: Each country gains from specialization under diminishing average production costs; Gains from international trade can be uneven for trading countries. A country can lose from international trade. Graphical illustration: Markusen, Ch. 12

№27 слайд
. . The model of
Содержание слайда: (7.3.) The model of International trade under external economies to scale: characteristics of general equilibrium

№28 слайд
Exercise sessions and Think
Содержание слайда: Exercise sessions 5 and 6 (2) Think about topics for reports during exercise sessions; work on presentation of the paper. Office hours: Friday 13:50 – 14:30, room 216. E-mail: natalya.davidson@gmail.com (Наталья Борисовна Давидсон)

№29 слайд
The next lecture Continuation
Содержание слайда: The next lecture Continuation of topic 7: Lecture 10 7.4. Monopolistic competition, returns to scale and international trade . 7.5. Models with heterogeneous firms (including the model by Marc Melitz (2003), models of choice between export and foreign direct investment). 7.6. Dumping. The structure and normative effects of international trade in ‘large’ economy under imperfect competition on the markets: the case of international oligopoly.

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