The efficiency of correlation-regression analysis would significantly expand if both of its essential variables - a dependent and an independent - conveyed the information on the dynamic rather than static state of a phenomenon under consideration. For this objective, the dynamic development of...

Freight transportation by rail is one of the most important factors in the country's economic development; and, therefore, a comprehensive analysis of the business development has both scientific and practical significance. The basis for the analysis and conclusion of this type is a possibility...

Investment in R&D today is an essential condition for the economic development of companies, industry as a whole and countries and regions. On the other hand, the financial capacity of economic operators is limited and it is important to know the benefits of these investments. In this context,...