CRITIC-Based Vertical Collusion Control Quality Prediction Based on the Coupling and Coordination Degrees of Socioenvironmental and Public-Investment Bidding Systems in China

Table 5

Calculation results of coupling coordination.

Year	Coupling degree				Coordination degree
	Original value	Predicted value	Residuals	Relative error	Original value	Predicted value	Residuals	Relative error
2006	0.176	0.176	−0.000	0.000%	0.151	0.151	−0.000	0.000%
2007	0.366	0.473	−0.107	29.107%	0.243	0.261	−0.018	7.402%
2008	0.505	0.494	0.011	2.114%	0.295	0.291	0.003	1.170%
2009	0.506	0.516	−0.010	1.889%	0.340	0.322	0.017	5.117%
2010	0.553	0.538	0.016	2.866%	0.368	0.354	0.014	3.846%
2011	0.565	0.559	0.005	0.915%	0.380	0.386	−0.006	1.677%
2012	0.584	0.582	0.003	0.497%	0.409	0.420	−0.011	2.653%
2013	0.654	0.604	0.050	7.707%	0.447	0.454	−0.007	1.525%
2014	0.714	0.626	0.087	12.245%	0.510	0.489	0.022	4.236%
2015	0.553	0.649	−0.096	17.300%	0.468	0.524	−0.057	12.125%
2016	0.732	0.672	0.060	8.190%	0.571	0.561	0.011	1.853%
2017	0.819	0.695	0.125	15.228%	0.656	0.598	0.058	8.785%
2018	0.766	0.718	0.048	6.262%	0.629	0.637	−0.007	1.148%
2019	0.687	0.741	−0.054	7.850%	0.674	0.676	−0.002	0.244%
2020	0.625	0.765	−0.140	22.336%	0.700	0.716	−0.016	2.342%
2021	—	0.789			—	0.757		-
2022	—	0.813			—	0.800		-
2023	—	0.837			—	0.843		-
2024	—	0.861			—	0.887		-
2025	—	0.886			—	0.932		-
	C = 0.2015				C = 0.022