China’s environmental problems have long been criticized. The Communist Party of China (CPC) and the government have increasingly paid attention to developing environmental protection and included the construction of an ecological civilization in the “Five-in-One” development strategy. The improvement of regional eco-efficiency is an important way to realize the coordinated development of the entire society, and environmental policy instruments are a powerful means to enhance regional eco-efficiency. This paper categorizes environmental policy instruments into mandatory, hybrid, and voluntary types. Based on panel data from 31 provinces in China from 2005 to 2015, the paper discusses the impact of environmental policy instruments on regional eco-efficiency and the means of the impact. The research shows that (1) mandatory and hybrid environmental policy instruments play a significant role in promoting regional eco-efficiency, while the role of voluntary instruments is not significant in promoting regional eco-efficiency; (2) hybrid and mandatory environmental policy instruments have negative interactions; and (3) the level of economic development will positively affect the role of hybrid environmental policy instruments in promoting regional eco-efficiency but negatively affect the role of mandatory instruments in promoting regional efficiency.

Based on policy instrument theory and a case of low-carbon city development (Qihe County in Shandong), this study examined the policy instruments adopted for low-carbon city development in China and the effectiveness of these instruments. All the policies adopted by the piloted city from 2008 and 2014 were collected, coded, and analyzed. A two-dimensional analytical framework was developed based on a trichotomous policy instrument categorization and low-carbon city connotation. The results showed that the key goal of China’s low-carbon city construction is to develop low-carbon technology and low-carbon energy. Compulsory policy instruments are the most used and most effective, while voluntary policy instruments are rarely used. Further results indicated that when the ratio of compulsory instruments and mixed instruments comes to 2:1, the combination of policy instruments can lead to the optimal completion degree. It seems difficult to balance the stability of various policy instruments with the overall high completion degree. Chinese local governments are more accustomed to compulsory policy instruments. This reminds policymakers to pay more attention to the potential of voluntary instruments and mixed instruments in building low-carbon cities.

This article investigates the perception biases of local government officials and the general public by comparing their benefit and risk perceptions towards controversial facilities. The analysis framework of Social Judgement Theory (SJT)—i.e., (a) economic benefits, (b) environmental health, and (c) social and political factors—was used to design the research. SJT is a widely recognized theoretical framework that includes experimental approaches to the study of cognitive conflicts. An experimental survey was conducted to collect data in order to make a comparison of the weight of different elements. Results demonstrate that there are perception differences between the general public and local officials on controversial facilities. Local officials responsible for endorsing and supervising plants attach more significance to environmental factors than the public, while the public focuses more on social and political factors than officials. There is no significant difference in the cognition of economic benefits. Factors such as demolition compensation and legitimacy may provoke these perception gaps. This paper enriches the current understanding of SJT and policy making for controversial facilities by investigating the perception gaps between officials and the general public.