Relationship between population cooperation and ...
Based on the total factor productivity index（expressed in tfpch）can be expressed by the Malmquist index：
The combination of Malmquist index and data envelopment analysis（DEA）method is used to calculate the change of productivity of the Department，and the Malmquist index can be decomposed into two parts.One part of the efficiency change，with effch；the other is a technical change，with techch.The Malmquist index formula can be expressed as：
The change of total factor productivity can be divided into technical change（techch）and efficiency change（effch），and the change of efficiency can be decomposed into pure technical efficiency change（pech）and scale efficiency change（sech）：
Here，effch＞1indicates that the efficiency is improved，effch＜1 shows that the efficiency is reduced；techch＞1 indicates that the technical progress，techch＜1shows that the technology is backward.Based on Cobb Douglas production function to determine input-output index.Input indicators for the number of employees，fixed assets，output indicators for the total industrial output value.The results are shown in Table 3.
Table 3 Two average value of Malmquist index of patch
The total factor productivity of industrial enterprises in Zhejiang province is relatively lower than Jiangsu province.The coordination of industrial population is not able to bring technological progress.The synergy of industrial enterprises has contributed to the high efficiency of industrial enterprises in Zhejiang.In the process of interaction between industrial enterprises of Zhejiang province and the industrial enterprises of Jiangsu province，the efficiency of enterprises is promoted.