The Heckscher – Ohlin – Samuelson model provides a mathematical proof of the possibility of equalizing the relative and absolute prices for production factors in international trade with certain assumptions. However, in practice, these assumptions are not followed. Therefore, there is a need to adjust the parameters of the model by calculating the indicators of cost estimation and the use of production factors. Therefore, the purpose of the research is to generalize the theoretical provisions of the Heckscher

– Ohlin – Samuelson model in order to find the possibilities of its application in the conditions of the post- war economic recovery of Ukraine. The main research methods were theoretical generalization, economic and statistical analysis, multivariate linear regression.

In the process of the research, several partial tasks were performed: 1) systematizing the views of scientists regarding methods of adjusting the parameters of the Heckscher – Ohlin –Samuelson model;

- the existence of a statistical relationship between the factor saturation of the economies of individual countries with the indicators of their foreign trade and changes in the prices of production factors;
- recommendations for the application of the Heckscher – Ohlin – Samuelson model in the conditions of the post-war economic recovery of Ukraine.

A comparison of the volumes of available labor and capital investment were made for 2020. And it proves that industrialized countries are excessively capital-saturated, but the calculation of *K/L *ratios still does not explain the structure of their international trade. At the same time, for some relatively developed countries, including Ukraine, the *K/L *ratio is “paradoxical”.

The results of the regression analysis of production factors and foreign trade indicators of 30 countries, of the largest volume of capital investments, prove the existence of a relatively close connection of *K/L *ratios with indicators of export-import and their growth, in condition of the involving of correction coefficients into the basic Heckscher – Ohlin – Samuelson model.

The main condition for applying the tools of the Heckscher – Ohlin – Samuelson model in modern practice is the mitigation of its assumptions regarding the homogeneity of production factors, their full use, and the limitation of their international mobility. In addition, it is necessary to ensure the identity of the measurement parameters of production factors in different statistical systems, taking into account the time factor and exchange rate differences.

The practical significance of the study is that in the conditions of the post-war economic recovery of Ukraine, most of the assumptions of the Heckscher – Ohlin – Samuelson model are nullified. Its explained by situation that state will have to introduce strict restrictions on the movement of production factors and international trade for some time. This allows to form real statistics on the use of production factors and, on its basis, to carry out programming of Ukraine's international trade.

- Heckscher, Eli (1919). The Effect of Foreign Trade on the Distribution of Income.
*Ekonomisk Tidskrift*, 497– 512. Reprinted as Chapter 13 in A. E. A. (1949).*Readings in the Theory of International Trade*, 272–300 (Philadelphia: - Ohlin, Bertil (1933). Interregional and International Trade.
*Harvard Economic Studies*.*Vol. XXXIX.*Harvard University Press; London: Humphrey Milford. 1933. 8vo. Pp. xvii + 617.*The Economic Journal, Vol. 44, Is. 173*, 1 March 1934, 95–102. - Samuelson, Paul (1948). International trade and the equalisation of factor prices.
*Economic Journal*, Vol. 58, No. 230 (June, 1948), 163–184. Published By: Oxford University Press. - Samuelson, Paul (1949). International factor price equalisation once again.
*Economic Journal*, Vol. 59, No. 234 (June, 1949), 181–197. Published By: Oxford University Press. - Samuelson, Paul (1953). Prices of factors and good in general equilibrium.
*Review of Economic Studies*, Vol. 21, Is. 1, 1–21. - Vanek, Jaroslav (1968).
*The Factor Proportions Theory: The N-Factor Case*. Kyklos, October, 749–755. - Rudiger Dornbusch, Stanley Fischer & Paul A. Samuelson (1980). Heckscher-Ohlin Trade Theory with a Continuum of Goods.
*The Quarterly Journal of Economics, Vol. 95, No. 2*(Sep., 1980), 203–224. - Matusz, Steven J. (1985). The Heckscher-Ohlin-Samuelson Model with Implicit Contracts.
*The Quarterly Journal of Economics*. Vol. 100, No. 4 (Nov., 1985), 1313–1329. - Harry B. Bowen, Edward E. Leamer & Leo Sveikauskas (1987). Multicountry, multifactor tests of the factor abundance theory.
*The American Economic Review*.*Vol. 77, No. 5*(December), 791–809. - Donald R. Davis, David Е. Weinstein, Scott С. Bradford & Kazushige Shimpo (1996). The Heckscher-Ohlin- Vanek model of trade: Why does it fail? When does it work?
*National bureau of economic research,*Cambridge, June. 53 p. - Bergstrand, Jeffrey H. (1990). The Heckscher-Ohlin-Samuelson Model, The Linder Hypothesis and the Determinants of Bilateral Intra-Industry Trade.
*The Economic Journal*, Vol. 100, No. 403 (Dec., 1990), 1216–1229. - Leamer, Edward E. (1995). The Heckscher-Ohlin Model in Theory and Practice.
*Princeton studies in international finance*. No. 77, February. 61 p. - James, Antoinette Mary (1993).
*Essays in international trade and the environment: Applications of Heckscher-Ohlin and nontraditional trade theories.*Doctoral Dissertations. University of New Hampshire - Yoshihara, Naoki and Kurose, Kazuhiro (2016). The Heckscher-Ohlin-Samuelson Model and the Cambridge Capital Controversies.
*Economics Department Working Paper Series*. 204. Retrieved from: https://doi.org/10.7275/8448679. - Brondino, Gabriel (2021). Fragmentation of Production, Comparative Advantage, and the Heckscher-Ohlin Theory.
*Review of Political Economy*, 1–20. - Mukherjee, Subho (2021). Heckscher-Ohlin’s Theory of International Trade. Retrieved from: https://www.economicsdiscussion.net/ heckscher-ohlins-theory/heckscher-ohlins-theory-of-international-trade/10697 (accessed 06.05.2022).
- Kopp, Carol M. (2022). Heckscher-Ohlin Model. Retrieved from: https://www.investopedia.com/terms/h/ heckscherohlin-model.asp (accessed 06.05.2022).
- Derzhavna sluzhba statystyky Ukrainy [State Statistics Service of Ukraine]. Retrieved from: http://www.ukrstat.gov.ua/ (accessed 16.05.2022).
- Natsionalnyi bank Ukrainy [National Bank of Ukraine]. Retrieved from: https://bank.gov.ua/ua/statistic/ sector-financial#1ms (accessed 18.07.2022).
- Deutsche Bundesbank. Retrieved from: https://www.bundesbank.de/en/statistics/money-and-capital- markets/interest-rates-and-yields/interest-rates-on-deposits-and-loans/ (accessed 18.07.2022).
- Bosak, Andriy & Zhyla, Diana (2022). Zastosuvannia teorii Khekshera-Olina u protsesi povoiennoho vidnovlennia ekonomiky Ukrainy [The Heckscher-Ohlin-Samuelson model: theoretical basis and conditions of application].
*Ekonomichnyi visnyk natsionalnoho tekhnichnoho universytetu Ukrainy “Kyivskyi politekhnichnyi instytut” [Economic bulletin of national technical university of Ukraine “Kyiv Polytechnical Institute”]*, No. 23, 26–33. - Derzhavna mytna sluzhba Ukrainy [State Customs Service of Ukraine]. Retrieved from: https://bi.customs.gov.ua/uk/trade/ (accessed 18.05.2022).
- Global economy. Retrieved from: https://www.theglobaleconomy.com/ (accessed 18.08.2022).
- The World Bank Group. Retrieved from: https://data.worldbank.org/indicator (accessed 18.08.2022).