Measuring the Impact of Travel Costs on Grocery Shopping
研究发现旅行成本增加会导致消费者在价格更高、品种更少的商店购物，且商店便利性比价格或品种更能驱动商店选择，这对改善低收入地区超市可及性的政策有参考价值。
We build an empirical framework for the analysis of grocery store choice. We find that higher travel costs lead people to shop at places where they pay higher prices and face less variety in economically significant magnitudes. Moreover, store convenience (or travel costs) – rather than prices or variety – is what drives store choice. These results suggest that policies increasing access to supermarkets in areas with a limited supermarket presence are a step in the right direction, in terms of getting people to shop at stores that are more affordable and more likely to offer healthy foods.