最適化型世界エネルギーモデルに基づく多地域間CO<sub>2</sub>排出許可証取引のゲーム論的分析

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  • Game Theoretic Analysis for Carbon Emission Permits Trading among Multiple World Regions with an Optimizing Global Energy Model
  • 最適化型世界エネルギーモデルに基づく多地域間CO2排出許可証取引のゲーム論的分析
  • サイテキ カガタ セカイ エネルギーモデル ニ モトズク タチイキ カン CO

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Carbon emissions which would cause global warming were agreed to be constrained at COP3 in Kyoto. In addition, carbon emission permits trading was also approved to be introduced. The emission permits trading is expected to achieve efficient carbon emission reduction, equalizing the marginal costs of the emission reduction for the participating countries. In other words, the permits trading allows participants to reduce emissions where it is least expensive to do so. However, the inadequate introduction of the trading systems may impose unfairly greater burden on some countries, and therefore careful evaluation of the system would be indispensable for its implementation.<br>In this paper, we attempt to analyze the emission permits trading, using the theory of cooperative games with a global energy model of optimization type. We assumed that seven world regions as players participate the permits trading system under the condition of the emission reduction target presented at COP3 and so on, and show the nucleolus of the grand coalition games, and the computational results of primary energy supplies and CO2 shadow prices.<br>The insights of this research indicate that in order to stabilize the grand coalition, a noticeable amount of additional transfer of money would be needed besides the payments associated with the emission permits trading.

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