减排框架下的排污权交易机制及其配套政策研究

本文通过建立数学模型,考察了减排框架下的原有企业、新进入企业和地方政府之间的排污权交易机制及其配套政策。首先分析原有企业,得到结论如下：第一,环境税对原有企业最佳排污量选择的影响是不确定的,原有企业最佳排污量选择随着排污权出售价格的上升而下降。第二,在排污权可以跨期交易的条件下,原有企业持有稀缺排污权符合利润最大化选择。其次研究了在排污权跨期交易机制下,新进入企业购买排污权的价格持续增加,这样将导致新进入企业进入成本不断提升。最后分析认为减排政策有助于提高区域经济福利。在此基础上,提出活跃排污权交易机制及其配套政策的建议。

Emissions Trading System and Supporting Policies Under An Emissions Reduction Framework

This paper,through building mathematical models,makes an analysis on the emissions trading system under an abatement framework.And the authors obtained four conclusions：（1） The impact by environmental taxes on the existing firm＇s choices of optimal discharging amounts is uncertain,the existing firm＇s discharging amounts will be on the decrease with the increased prices of emissions permits,and paid initial emissions allowances will reduce the existing firm＇s profits;（2） Under an intertemporal trading system,the existing firm＇s holding the permits conforms to the principle of profit maximization;（3） Under the intertemporal trading system,the prices for emissions permits for the entrant firms are always on the rise and so are their access costs into the industries,thus frustrating local governments＇ efforts in attracting investments;and（4） Emissions reduction policy is a good regulatory instrument for promoting local economic welfare and realizing sustainable development.The paper also gives some suggestions for triggering and activating the emissions trading system and formulating supportive policies.