在多次市场失灵的经济体中估计影子价格
Alan Hernández-Solano1, Véronique Sophie Avila-Foucat2, George A Dyer3
1Instituto de Investigaciones para el Desarrollo con Equidad, Universidad Iberoamericana, Mexico City, Mexico.
PloS one
|November 6, 2023
概括
估计影子价格需要考虑多次市场故障,这是发展中国家常见的. 这项研究揭示了当前的方法偏差估计,特别是对生活用品,影响贫困评估.
科学领域:
- 经济学 经济学 经济学
- 发展经济学 发展经济学
- 农业经济学 农业经济学
背景情况:
- 传统的影子价格估计假定单一市场失败,这对发展中国家来说是不现实的.
- 多重市场失败,特别是在劳动力市场,通常发生在发展中经济体.
- 当前用于估计影子价格的方法在存在多个市场故障时具有偏见.
研究的目的:
- 在劳动力市场失败的经济体中,开发一个理论模型和经验策略来估计生存商品的影子价格.
- 为了解决当前影子价格估计方法中的偏差,当完美的市场假设被侵犯时.
- 通过提供对生活用品无偏见的影子价格估计来提高贫困度量的准确性.
主要方法:
- 在劳动力市场失败的情况下,开发一个理论经济模型来估计影子价格.
- 实证策略利用墨西哥农村的代表性调查.
- 估计的影子价格与劳动力和生活玉米市场价格的比较分析.
主要成果:
- 一种生活商品的影子价格大于或等于其对生活生产者的市场价格.
- 墨西哥农村的影子工资明显低于市场工资 (MXN 93.2美元/天,相比132.3美元/天).
- 墨西哥农村生存玉米的影子价格是其市场价格的十倍以上 (MXN 32.37美元/公斤对3.19美元/公斤).
结论:
- 当前的影子价格估计方法在存在多个市场故障时会产生重大偏差.
- 无偏见的影子价格估计对于准确的收入和贫困评估至关重要,特别是对于维持生计的家庭.
- 在墨西哥农村,当前的贫困指标低估了粮食不安全的人口,因为它们没有考虑到生活必需品和家庭购买力的真实价值.
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