We Introduce produce elements factor of tendency result coefficient, turn structure production function model into identity that come into existence to every group of sample.
引入生产要素的势效系数，将结构生产函数模型转化为对任意一组样本成立的恒等式。
We Introduce produce elements factor of tendency result coefficient, turn structure production function model into identity that come into existence to every group of sample.
引入生产要素的势效系数，将结构生产函数模型转化为对任意一组样本成立的恒等式。
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