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October 8, 2026
HSE Experts Take Part in 23rd Annual Meeting of Valdai Discussion Club
The 23rd Annual Meeting of the Valdai Discussion Club was held from September 28 to October 1, 2026 under the theme ‘Responsibility for the Future: Limits of the Possible, or Limitless Possibilities?’ The forum brought together 120 experts from 40 countries, including representatives of China, the United States, India, Brazil, the United Kingdom, Germany, Egypt, Iran, and Japan.
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The International N5 Symposium ‘Neural Networks and Nonlinearity in Nizhny Novgorod’ was held at the Nizhny Novgorod House of Scientists from September 23 to 26. The event was organised by HSE University–Nizhny Novgorod and the Nizhny Novgorod House of Scientists, with the participation of Sberbank and the Institute of Physics Belgrade. The symposium was held for the second time: the first conference took place in 2025 and attracted considerable interest from the academic community.

 

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Equilibrium existence in Krugman’s and Bertoletti–Etro’s trade models: the general case

Economic Theory. 2025.
Slepov F., Kokovin S. G.

We revisit Krugman’s (J Int Econ 9(4):469–479, 1979.) classical trade model in its general form with several asymmetric countries and unspecified additive utility functions. We present the weakest known conditions on utilities sufficient for the existence of equilibrium. These conditions are also necessary under symmetric preferences. Using the same method for Bertoletti and Etro’s (Econ J 127(603):1217–1243, 2017.) trade model with several asymmetric countries, we establish sufficient conditions on unspecified indirect utilities for the existence of equilibrium.

Language: English
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Keywords: international tradevariable markupsmonopolistic competitionvariable elasticity of substitutionExistence of equilibriumIndirect profits
Publication based on the results of:
Economic and mathematical analysis of markets, games, and decision-making (2025)
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