Analysis of food demand in Vietnam and short‐term impacts of market shocks on quantity and calorie consumption
利用越南家庭调查数据估计完整需求系统，发现大米需求相对缺乏弹性；短期市场冲击（如收入下降10%或米价上涨30%）迫使家庭增加大米支出而减少其他食品，低收入家庭热量摄入更易受损，凸显对贫困人口安全网政策的重要性。
Abstract A complete demand system for Vietnam was estimated using household survey data. Results showed that demand for rice with respect to prices and expenditure is relatively inelastic compared to other foods. Demand for food in general tends to be less elastic at higher levels of income and for urban households. In the short term, a market shock such as a 10% decrease in income or a 30% increase in rice prices forces households to spend a larger portion of their expenditure on rice at the expense of other foods. Low‐income households face a higher risk of undernourishment as their daily calorie intake is more negatively affected by the shocks than high‐income households. The results suggest the importance of policies that provide necessary safety net programs for the poor.