The influence of research and development on the profit of enterprises——based on the analysis angle of the heterogeneity productivity

The pursuit of profit maximization under the given condition is the primary purpose of enterprises,and R D is the important way for enterprises to improve their productivity.In this paper,we first set up mathematical model,then we research the influence of R D on the profit of enterprise from the angle of heterogeneity productivity,and at last we use the sample of manufacturing industry enterprises to test whether R D expenditure have an effect on the productivity and profitability of enterprises.For the profitability of enterprises,we verify the influence of R D on the profit scale and profit margins of enterprise separately.The conclusion is that R D improves the productivity and profitability of enterprises,the productivity,profit scale and profit margins is significantly higher than the enterprises which did not carry out R D,the scale of R D expenditure has a significant positive correlation with productivity,profit scale and profit margins of enterprises.