An Engel Curve for Variety
研究了家庭消费多样性的来源和福利影响，发现印度家庭饮食多样性增加主要源于获取多样性的成本下降，带来巨大福利改善，且城市家庭比农村家庭受益更多。
I examine the source and welfare implications of differences in household consumption diversity. I document the existence of a positive correlation between household variety and expenditure to motivate a simple framework where households purchase more varieties to counteract diminishing returns to quantity but face location-specific costs of accessing variety. Estimating the model with Indian household data, I find that the increase in dietary diversity between 1983 and 2009 was mostly due to lower costs of accessing variety, which resulted in large welfare gains. Urban households also benefit from a lower cost of accessing varieties than rural households.