School of Economics and Management, Wuhan University, Wuhan 430072, China.
School of Economics and Management, Wuhan University, Wuhan 430072, China.
J Environ Manage. 2023 Jan 1;325(Pt A):116483. doi: 10.1016/j.jenvman.2022.116483. Epub 2022 Oct 13.
The development of new energy vehicles (NEVs) cannot be separated from the support of subsidy policies. However, the effectiveness of different subsidy policies remains to be verified. To investigate a more effective way of NEV subsidy and maximize the effect of subsidy policies, this study proposes two subsidy strategies, namely, consistent subsidy and adaptive subsidy, and constructs a network-based evolutionary game model for NEV diffusion. The effects of different subsidy policies are then comprehensively evaluated from the supply and demand sides, and their internal influence mechanisms are further investigated. Results show that: 1) from the supply side, subsidy for both policy achieves the highest NEV diffusion, but subsidy for enterprises is more efficient; 2) from the demand side, NEV diffusion increases NEV sales in the same proportion. Surprisingly, the increase in NEV diffusion rate benefits traditional vehicle manufacturers by expanding their average market demand; 3) from the cost-benefit analysis, the adaptive subsidy is more efficient than consistent subsidy; 4) The higher the initial benefits of NEV enterprises, the higher the level of NEV diffusion. The government should implement the adaptive subsidy and focus on providing subsidies to NEV enterprises to increase the NEV diffusion rate and achieve efficient resource allocation.
新能源汽车（NEV）的发展离不开补贴政策的支持。然而，不同补贴政策的效果仍有待验证。为了探寻更有效的新能源汽车补贴方式，使补贴政策效果最大化，本研究提出了两种补贴策略，即一致性补贴和适应性补贴，并构建了基于网络的新能源汽车扩散演化博弈模型。然后从供给和需求两个方面综合评估了不同补贴政策的效果，并进一步探讨了其内部影响机制。结果表明：1）从供给侧看，两种政策的补贴均能实现新能源汽车的最高扩散，但企业补贴更为有效；2）从需求侧看，新能源汽车的扩散会按相同比例增加新能源汽车的销售，出人意料的是，新能源汽车扩散率的提高会通过扩大传统汽车制造商的平均市场需求使他们受益；3）从成本效益分析来看，适应性补贴比一致性补贴更有效；4）新能源汽车企业的初始收益越高，新能源汽车的扩散水平越高。政府应实施适应性补贴，并重点向新能源汽车企业提供补贴，以提高新能源汽车的扩散率，实现资源的有效配置。
