Exploring the transition effects of foreign direct investment on the eco-efficiency of Chinese cities: Based on multi-source data and panel smooth transition regression models
Foreign direct investment (FDI) has not only been considered to be an important economic engine to promote economic growth in China, but also has played a pivotal role in the ecological environment.Empirically, it may exhibit two conflicting effects, namely, pollution haven effect and pollution halo effect.Hence, it is of great significance of re-e