Poland is the biggest FDI recipient of the EU countries located in Central Europe. The statistics are showing also more and more investment high activity of Polish companies on the foreign markets. Towards the strong competition and high costs of the workforce in EU countries, Polish companies as the location of their investments often choose markets outside the EU, including the Russian market. The article presents the analysis of the investment cooperation between Poland and the Russian Federation and shows the essential barriers negatively influencing in the shape of these relations. He is pointing in addition also the high importance of the role of the economic diplomacy in the development of cooperation investment between both countries.

The development objective of the article is to present in the last fifteen years the level of economic relations of Moldova and Ukraine with the Russian Federation and the European Union. In connection with this study it was covered by the value of the trade of Moldova and Ukraine with the European Union and the Russian Federation, as well as the volume of the foreign direct investments EU and Russia in the Moldovan and Ukrainian economy.

Derive the importance of foreign direct investment in the world, particularly in the developing countries. FDI is critical for the developing countries which need multinational funding and expertise to expand, give structure, and guide their will to boost manufacturing and service sectors. Due to its role in promoting the growth and development wheel, providing financial resources complementary to national savings, and contributing to the transfer of technology and skills associated with modern production methods, it has emerged as one of the most significant sources of support for development. As the deteriorating economic conditions of developing countries did not leave them with many options or other solutions, their only option was to open their economies. The research touches on multiple subjects such as: Statistical Decision Theory by using statistical data to prove some of the research points, Multidimensional Statistical Analysis, Financial Econometrics which includes the financial related remarks as GDP part of the research, etc. In this sense, the goals of this paper are to highlight the importance of FDI in achieving the development in developing countries.