SUMMARY
This article examines the influence of national culture on the behavior of enterprises by comparing two countries - Ukraine and Slovakia. The data is based on the original author's own research on the enterprises of Ukraine and Slovakia. The paper is investigated why and how cultural factors (informal institutions) may influence the perception of companies of rules of the game, and the formation of appropriate behavior. On the basis of surveys conducted among enterprises of Ukraine and Slovakia main conclusions about current formal rules of the game in these countries, perception by entrepreneurs these rules and the formation of certain behavior by them are done. In work on the basis of comparative analysis conclusions about the impact of national culture on the development of entrepreneurship in the national economy are done.The author of the article examines the following indicators: national culture, personal characteristics of respondents, subordination of norms, opportunism, and coherence of formal and informal institutions at the national level. In particular the most important indicators of the perception of norms are: indicators of perception of entrepreneurs of regulation and public policies in the field of entrepreneurship, business productivity, perceptions of bribery and tax evasion, etc.