Global warming is the most serious problem we face today. Each country is expected to ensure international cooperation toward minimizing risk. To evaluate the countermeasures, many researchers have developed integrated assessment models (IAMs). Then, how can each country achieve its emission quota? This study proposes models that analyze the economic impact of global warming in a region based on the results obtained by the global model. By using these suggested models, we perform a comparative analysis on three policy cases: a different regulations case, a unified regulation case, and an output redistribution case. We analyzed Japan as one of the case studies and found that more developed areas should implement stricter regulations in all scenarios. In addition, the case of applying different regulations by area (in a region) is not always preferable to using unified regulations in the region. Alternatively, the output gap between the output redistribution case and the different regulations case is much higher than the gap between the unified regulation case and the different regulations case. In all scenarios, the present values of the output of the output redistribution case are also higher than the other cases. The different regulations case and the unified regulation case are based on the model without capital transfer between areas, whereas the output redistribution case is based on the model with free capital transfer between areas. Although both models are extreme situations, the regions close to the without capital transfer situation possibly have an incentive to use the different regulations policy, depending on the emission target. The regions close to the situation with free capital transfer would probably prefer unified regulation.

中文翻译：

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控制一个地区每个区域的CO2排放：日本为例。

全球变暖是我们今天面临的最严重的问题。预计每个国家都将确保开展国际合作以最大程度地降低风险。为了评估对策，许多研究人员开发了综合评估模型（IAM）。那么，每个国家如何实现排放配额？本研究提出了基于全球模型获得的结果来分析全球变暖对一个地区的经济影响的模型。通过使用这些建议的模型，我们对三种政策案例进行了比较分析：不同的法规案例，统一的法规案例和产出重新分配案例。我们将日本作为案例研究之一进行分析，发现较发达的地区应在所有情况下均执行更严格的规定。此外，在区域内（区域）应用不同法规的情况并不总是比在区域内使用统一法规更好。或者，输出重新分配案例与不同法规案例之间的输出差距要比统一法规案例与不同法规案例之间的差距高得多。在所有情况下，输出重新分配案例的输出当前值也高于其他情况。不同的监管案例和统一监管案例基于没有区域间资本转移的模型，而产出再分配案例基于具有区域间资本自由转移的模型。尽管两种模式都是极端情况，接近无资本转移情况的地区可能有动力根据排放目标采用不同的法规政策。接近自由资本转移情况的地区可能更喜欢统一监管。