[Retracted] Innovation and Entrepreneurship Coupling Based on Simultaneous Equation Model and Its Energy Economic Effect Measurement

Table 6

Coupling and coordination degree of digital economy and high-quality development in cities of different levels.

Years	First-tier cities	New first-tier cities	Second-tier cities	Third-tier city	Fourth-tier cities	Fifth-tier cities
2016	0.6134	0.4267	0.3756	0.2857	0.2742	0.2745
2017	0.6228	0.4476	0.3837	0.2971	0.2862	0.2824
2018	0.6287	0.4723	0.3951	0.3094	0.2975	0.2958
2019	0.6507	0.4756	0.4133	0.3244	0.3128	0.3127
2020	0.6452	0.4846	0.4275	0.3335	0.3213	0.3232
2021	0.6688	0.4963	0.4433	0.3508	0.3344	0.3414
Average value	0.6384	0.4672	0.4064	0.3168	0.3043	0.3051
Sample size	25	91	181	415	482	439