Prediction on the Peak of the CO₂ Emissions in China Using the STIRPAT Model

Table 2

The coefficients for estimated values of ridge .

_RIDGE_	_RMSE_	Intercept	x1	x2	x3	x4	x5	x6
0		0	0.078284	1.853315	0.971664	3.98E-08	−3.6E-09	−1.3E-09
0.05	0.013621	−4.06856	3.91358	0.154094	−0.1459	0.672474	1.647865	0.028697
0.1	0.01573	−3.70058	3.663732	0.147276	−0.17567	0.635763	1.588497	−0.00499
0.15	0.018005	−3.45057	3.515171	0.143406	−0.18573	0.613803	1.508606	−0.03088
0.2	0.020388	−3.25215	3.406391	0.140245	−0.18989	0.597171	1.428594	−0.05225
0.25	0.022793	−3.08336	3.318024	0.137428	−0.19154	0.583269	1.352639	−0.07037
0.3	0.025169	−2.9346	3.242079	0.134839	−0.19191	0.571062	1.281704	−0.08596
0.35	0.027488	−2.80075	3.174591	0.132426	−0.19156	0.560039	1.215826	−0.09948
0.4	0.029739	−2.6787	3.113325	0.130158	−0.19078	0.549911	1.154741	−0.11129
0.45	0.031916	−2.56636	3.056892	0.128016	−0.18972	0.540495	1.098091	−0.12166
0.5	0.034019	−2.46223	3.004369	0.125982	−0.18848	0.531666	1.045499	−0.13078
0.55	0.036049	−2.36517	2.955104	0.124047	−0.18712	0.523336	0.996607	−0.13884
0.6	0.03801	−2.27429	2.908617	0.122199	−0.18569	0.515438	0.951084	−0.14598
0.65	0.039906	−2.18888	2.864542	0.12043	−0.18421	0.507918	0.908627	−0.15232
0.7	0.04174	−2.10834	2.822592	0.118734	−0.1827	0.500737	0.868964	−0.15795
0.75	0.043515	−2.03218	2.782534	0.117105	−0.18117	0.49386	0.831852	−0.16295
0.8	0.045236	−1.95998	2.744178	0.115536	−0.17964	0.487257	0.797071	−0.16741
0.85	0.046905	−1.89138	2.707365	0.114025	−0.17811	0.480907	0.764426	−0.17137
0.9	0.048525	−1.82606	2.671962	0.112566	−0.17658	0.474787	0.733739	−0.17491
0.95	0.0501	−1.76375	2.637852	0.111157	−0.17506	0.46888	0.704854	−0.17805
1	0.051632	−1.70421	2.604937	0.109793	−0.17356	0.463171	0.677627	−0.18084