Modelling borders of expediency of use of money funds for ensuring efficiency of marketing activity of industrial enterprises

The article offers improvement of methods of determining the limit exceeding which additional attraction of money funds does not ensure efficiency of marketing activity. These methods are based on the use of theoretical approach based on analysis of change of marginal utility. This approach lies in: 1) the use of the correlation-regression analysis of dependency of change of indicators of efficiency of enterprise activity on change of the volume of resources (money funds) directed at conduct of marketing activity; and 2) determination of first derivatives (extreme values, if possible) of relevant functions. Practical use of the offered methods allows determination of the maximum volume of investments into the marketing activity required for ensuring its efficiency.