Abstract:

Nevertheless, one of the most important “engine” of the economy all over the world is represented by the investments, particularly by the direct investments. There is no economic growth, no prosperity, no high standard of living without direct investments.  In this paper we discussed the direct investment determinants, variables, and its relation to the level of income, consuming from the mathematical and statistical point of view. We’ll also study the Keynesian model, which is considered the most important models in determining investment and consuming, and we’ll show the viewpoint of Keynesian School in consuming and saving.