不平等是否影响穷人的需求?

Abstract We investigate how inequality affects what is considered most necessary to purchase. Combining detailed consumption surveys in India with an instrumental variable approach, we first provide evidence that inequality is associated with a decrease in calorie consumption for poor households. This effect is driven by upward comparisons and associated with poor households spending more on luxuries, consistent with the relative deprivation theory. We then estimate a structural demand system to isolate the impact of inequality on needs from supply-side effects. We find that inequality increases the need of the poor for “little luxuries” (e.g., dairy products, energy use) at the expense of necessities (e.g., cereals). This shift in the hierarchy of needs accounts for more than two-thirds of the decline in the calorie consumption of the poor over the period.