Investment In Highway Construction Stimulating The National Economy

On the basis of the characteristics of highway investment and the basic relations of investment and economic increasing, this paper explicates the relation of highway investment particularly. Then, according to the theory of marginal effect descending, the paper demonstrates the superiority degree of highway investment, and then compares the superiority of highway investment on the condition that the development of highway adapts or maladjustments to the economic development .On computing the effect of highway investment to the Gross economy, the paper disparts the effect of highway investment to the Gross economy into two parts, one is the effect of directness, the another is the effect of indirectness. In the course of directness the paper uses the original definition of investment multiplier computers highway investment multiplier. And then the paper uses production function method to computer the effect of directness. On discussing the effect of indirectness, the paper elaborates the mechanism and the numeration of diversified effect. At last according to the condition of jing-shi expressway in the hebei province, the paper counts the effect of jing-shi express way investment to Gross economy.