Farmers’ Subjective Valuation of Subsistence Crops: The Case of Traditional Maize in Mexico
理论推导了具有非市场价值的生计作物的影子价格，并利用墨西哥全国农村家庭调查数据估计了玉米的影子价格，发现传统玉米品种的影子价格显著高于市场价格，尤其在墨西哥南部和东南部的土著地区，表明存在维持传统品种的实际激励。
Abstract Shadow prices guide farmers’ resource allocations, but for subsistence farmers who grow traditional crops they may bear little relationship with market prices. We theoretically derive shadow prices for a subsistence crop with nonmarket value, then estimate shadow prices of maize using data from a nationally representative survey of rural households in Mexico. Shadow prices are significantly higher than market prices for traditional but not improved maize varieties. They are particularly high in the indigenous areas of southern and southeastern Mexico, indicating large de facto incentives to maintain traditional varieties there.