Water applications and Pigouvian taxes to control irrigation-induced soil degradation

• 成果类型: Article
• 署名作者: Janmaat, J
• 署名单位: Acadia University
• 刊物名称: JOURNAL OF DEVELOPMENT ECONOMICS
• ISSN/ISSBN: 0304-3878
• DOI: 10.1016/j.jdeveco.2003.12.013
• 发表日期: 2005
• 页码: 209-230
• 关键词: soil degradation; Environmental tax; irrigation; semi-arid agriculture; sustainability measurement

摘要

Salt and water transport external costs of irrigation are borne disproportionately by lower elevation farmers. The relationship between fields for an optimal Pigouvian tax plan varies considerably as the amount of available water changes, demonstrating that a simple rule cannot be relied upon. A numerical example demonstrates the optimal application pattern and Pigouvian tax plan in contrast to the sequential Nash equilibrium. Shadow values for water are used to argue that between distributaries, the second best optimum is unlikely to be equal allocation. Physical measures of soil state are also shown to be worse under the optimal plan, throwing doubt on their usefulness. (C) 2004 Elsevier B.V. All rights reserved.