1. College of Economics, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
2. College of Mathematics and Informatics, Fujian Normal University , Fuzhou 350117, China
Abstract By relaxing the hypothesis that the in°uence of independent variable in parametric
spatial lag model is a linear or nonlinear function of some known form, a nonparametric spatial lag
model with random independent variables is considered. The GMM estimation method of the model
is constructed, the asymptotic properties of the estimators are derived and the small sample perfor-
mances of the estimates are investigated by Monte Carlo simulation.In addition, the estimation methods
proposed are applied to estimate the growth rate of TFP of China's provinces and municipalities.