ces production造句

• Ces production function
  不变替代弹性生产函数
• First of all , both r & d labor and r & d capital input variables are introduced into the input vector , and a two - level ces production function model is constructed to describe the technology of production . then the firm - level cross - section data of shanghai ’ s main manufacturing industries in 2003 is employed to study the input - output effect of r & d as well as the substitution relationship among input factors . moreover , the thesis also makes a methodological discussion of multicollinearity , and proposes a feasible approach to deal with the problem
  首先,在生产函数的投入要素向量中引入r & d投入变量,包括r & d人力投入和r & d资本投入;然后,结合相关的研究经验和本文的研究目的,构建了相应的二级ces生产函数模型;在此基础之上,采用2003年上海主要制造业企业的横截面数据,分行业研究了r & d投入对产出的作用以及r & d投入与非r & d投入之间的替代关系。