Research on Industry Difference and Convergence of Green Innovation Efficiency of Manufacturing Industry in China Based on Super-SBM and Convergence Models

Table 4

σ value of green innovation efficiency of manufacturing industry in China and three major industry groups.

Years	National manufacturing industry	Low-end technology industry group	Mid-end technology industry group	High-end technology industry group
2010	0.727	0.666	0.331	0.655
2011	0.776	0.767	0.435	0.614
2012	0.677	0.650	0.368	0.567
2013	0.621	0.618	0.231	0.484
2014	0.650	0.639	0.277	0.519
2015	0.579	0.567	0.734	0.511
2016	0.589	0.594	0.306	0.441
2017	0.562	0.583	0.669	0.408
2018	0.483	0.515	0.571	0.391
2019	0.494	0.530	0.549	0.379