Table 1: The estimation results of parameters in model (12) with .

L NL L NL L NL −0.0050 −0.0753 0.0016 −0.0407 0.0215 0.0754 −0.6284 1.0035 0.1551 1.2353 −0.2587 −1.4196 −0.2203 −0.6022 −0.4282 0.5073 0.1220 −0.1173 0.4818 2.1463 0.1034 0.4666 −0.2939 −1.3398   −16.778   −2.7541   7.3886   4.7152   −18.606   4.4934   −16.371   −9.1467   10.295   4.7435   −4.9194   2.8206   1.2345   3.6713   −1.0608   −10.108   3.6943   4.0766 SSR SSR SSR 0.4955 0.6803 0.5615 0.7399 0.4705 0.6918

Note: SSR is the sum squared residuals. L stands for the linear economic model (1). NL stands for the nonlinear economic model (14). stands for the -squared value.