The evolution of international trade theories in the 20^th–21^st centuries

The article examines the development of international trade theories in the 20^th and 21^st centuries, starting from classical and neoclassical theories and culminating in new approaches that take into account the contemporary realities of the global economy. The primary focus is on the evolution of theories, beginning with the works of Swedish economists E. Heckscher and B. Ohlin, who laid the foundation for the factor proportions theory. The further development of international trade theory is associated with the works of W. Stolper and P. Samuelson, who, in their Stolper–Samuelson theorem, established a connection between factor prices and the demand for goods under free trade. The article also examines approaches to international trade developed by such scholars as B. Balassa, H. Grubel, C. Lancaster, and E. Helpman. This article also explores the modern theory of international trade that was developed in the late 20^th and early 21^st centuries, closely linked to the contributions of P. Krugman. Unlike classical and neoclassical models, this new theory is based on the idea of monopolistic competition and takes into account both the preferences of economic agents and the effects of economies of scale. Krugman’s framework suggests the existence of monopolistic competition, characterized by markets with a wide variety of differentiated products, where firms lack significant market power. The article explains the progression of international trade theories, moving from classical models focused on comparative advantages and factor endowments to more advanced and realistic models that consider imperfect competition and other contemporary economic realities.

1. Galkina I. V. (2019). History of Economic Doctrines: Study Guide. Gomel: Ministry of Transport and Communications of the Republic of Belarus, Belarusian State University of Transport, 86 p. (in Russian).

2. Gnetov V. A. (2019). Theory of production factors’ ratio: its significance and verification by V. Leontiev. Economics and Contemporary Management: Theory, methodology, practices: compendium of The VI International scientific and practical conference. Penza: Science and Education (in Russian).

3. Seltsovsky V. L. (2008). Conceptual foundations of international trade theory. Russian Bulletin of International Trade, December, no. 12, pp. 3–13 (in Russian).

4. Khromchenko R. D., Maksimov Yu.V. (2019). General characteristics of “Dutch disease”. Rybchinsky’s theorem. Innovation development: Sciences potential and contemporary education: monograph. Ed. by Gulyaev G.Yu. Penza: Science and Education (in Russian).

5. Baldwin R. (2005). Heterogeneous Firms and Trade: Testable and Untestable Properties of the Melitz Model [Online]. National Bureau of Economic Research. July 11, 2021. http://www.nber.org/papers/w11471.

6. Deardorff A. V. (2021). Introduction to the Lerner Diagram [Online]. University of Michigan. July 1, 2002. June 21, 2021. URL: http://www-personal.umich.edu/~alandear/writings/Lerner.pdf

7. Deardorff A. V. (1997). Overview of the Stolper-­Samuelson Theorem. The Stolper-­Samuelson Theorem: A Golden Jubilee. Ed. by Deardorff A. V., Michigan R. M. Stern: The University of Michigan Press.

8. Dixit A., Stiglitz J. (1977). Monopolistic Competition and Optimum Product Diversity. The American Economic Review ([s. l.]. American Economic Association), no. 67 (3), pp. 297–308.

9. Dunn R. M., Jr., Mutti J. H. (2004). International Economics. New York: Routledge, 6th, pp. 52–68.

10. Dunn R.M., Jr., Mutti John H. (2004). International Economics. New York: Routledge, 6th, pp. 52–68.

11. Greenway D., Milner C. (1983). On the Measurement of Intra-­Industry Trade. The Economic Journal, vol. 93, no. 372, pp. 900–908.

12. Grubel H. (1967). Intra-­Industry Specialization and the Pattern of Trade. Canadian Journal of Economics and Political Science, no. 33 (3), pp. 374–388.

13. Grubel H. G., Lloyd P. J. (1975). Intra-­Industry Trade. London: Macmillan.

14. Krugman P. (1979). Increasing Returns, Monopolistic Competition, and International Trade. Journal of International Economics (([s. l.]: North-­Holland Publishing Company), no. 9, pp. 469–479.

15. Krugman P. (1980). Scale Economy, Product differentiation, and the Pattern of Trade. The American Economic Review. December, vol. 70, no. 5, pp. 950–959.

16. Meliz M., Trefler D. (2012). Gains from Trade when Firms Matter. Journal of Economic Perspectives, vol. 26, no. 2, pp. 91–118.

17. Meliz M. J. (2021). The Impact of Trade on Intra-­Industry Reallocations and Aggregate Industry Productivity [Online]. National Bureau of Economic Research. 2002. July 8. URL: https://www.nber.org/papers/w8881.

18. Ohlin B. (1933). Interregional and international trade. Cambridge: Harvard University Press. 617 p.