Adopting the GM (1,1) simulated values of system variables to build the econometrics model, they have enhanced the stability of model system and heightened the accuracy of the predicted values that get from econometrics model.

• 采用系统变量的GM(1,1)模拟值建立经济计量学模型,增强了模型系统的稳定性; 以解释变量的GM(1,1)预测值作为内生变量预测的基础,提高了经济计量学模型预测的科学性;