日本の環境保全型農業直接支払交付金の環境影響評価

環境経済統合モデルによる政策分析

抄録

Governments implement various policy measures to improve the environmental performance of the agriculture sector, but their environmental impacts are difficult to assess quantitatively. This study analyzes the environmental performance of Japanese direct payment for environmentally friendly farming, by using the OECD's policy impact model. The results suggest that such direct payments can improve the level of nitrogen purification and carbon sequestration, while they increase the emission of ammonium. Policy measures bring several different impacts both to farm economics and the environment; thus it is important to understand their effects so as to improve the cost-effectiveness of agri-ennvironmental policy measures.