Relative prices, consumer preferences, and the demand for food
研究了英国食品相对价格变化如何影响家庭购物篮的营养质量，发现价格变动导致营养质量下降，但偏好变化部分抵消了这一影响。
Shocks to world commodity prices and the depreciation of sterling led to a large increase in the price of food in the UK. It also resulted in large changes in the relative prices of different foods. We document these changes, and consider how they affected the composition of households’ shopping baskets. We isolate the impact of changes in relative food prices from variation in preferences using data on purchasing decisions made by a representative panel of British households. We show that changes in relative food prices led to a worsening in the nutritional quality of households’ shopping baskets, though this was partially mitigated by offsetting changes in preferences.