Climate Change Impacts on Winter Wheat Yield in Northern China

Table 2

Estimated parameters for fixed-effects model.

Variables	Coefficient	Prob.
C	6.192	<0.001
lnF	0.094	0.026
lnM	0.157	0.004
lnL	−0.223	0.016
lnG	0.265	0.008
lnT	−0.109	0.327
lnP	0.186	<0.001
Te	0.003	0.361
Fixed Effects (corss)
Jing-jin-ji_C	−0.088
Shanxi_C	0.110
Shaanxi_C	0.048
Shandong_C	−0.042
Henan_C	−0.028
Model Performance Evaluation
Adj R^2	0.91
F-statistic	167.70	<0.001
NRMSE	8.14%
IA	0.98

and represent the parameters are significant at the 5% and 1% levels, respectively.