Do Prices and Attributes Explain International Differences in Food Purchases?
利用美、法、英三国家庭数据，估计食品和营养需求系统，模拟不同价格和营养特征下的反事实选择，发现价格和特征能解释部分差异（如热量摄入），但无法单独解释构成模式，需结合经济环境与偏好差异。
Food purchases differ substantially across countries. We use detailed household-level data from the United States, France, and the United Kingdom to (i) document these differences; (ii) estimate a demand system for food and nutrients; and (iii) simulate counterfactual choices if households faced prices and nutritional characteristics from other countries. We find that differences in prices and characteristics are important and can explain some difference (e.g., United States–France difference in caloric intake) but generally cannot explain many of the compositional patterns by themselves. Instead, it seems an interaction between the economic environment and differences in preferences is needed to explain cross-country differences.