fig4
![Environmental management efficiency evaluation based on indicator information integration and DEA-Malmquist index](https://image.oaes.cc/5e57422b-e677-4a17-8bc7-16afa034179d/4423.fig.4.jpg)
Figure 4. Number of provinces showing different returns to scale from 2013 to 2017.
Figure 4. Number of provinces showing different returns to scale from 2013 to 2017.
All published articles are preserved here permanently:
https://www.portico.org/publishers/oae/