简介(Introduction) 我们知道在实际应用中有许多非线性方程的例子,例如 (1)在光的衍射理论(the theory ofdiffraction of light)中,我们需要求x-tanx=0的根 (2)在行星轨道(planetary orbits)的计算中,对任意的a和b,我们需要求x-asinx=b的根
1. Single equation estimation procedures Indirect least squares(ILS)(恰好识别) Two- -stage least squares(2SLS)(过度识别) 2. System estimation procedures Three-stage- least squares(sLS)(跨方程相 关) In1962 Theil and Zellner first proposed this method. 2SLS+GLS= 3SLS (gls=generalized least squares)