Expenditure dispersion and dietary quality: evidence from Canada
研究了加拿大家庭食品支出在时间上的分散程度与所购食品的膳食质量之间的关系，发现更频繁的小额购买与更健康的饮食相关，尤其对饮食质量差的家庭影响更大。
This paper examines links between the way in which a household spreads their food expenditure over time and the dietary quality of the food they purchase. I find that households who make more frequent, smaller food purchases buy healthier foods than households who make fewer, larger purchases. These households are more likely to purchase foods with a lower share of total calories from fats, saturated fats and a larger share of calories from fruits and vegetables. The analysis is extended using quantile regression. The effect of expenditure dispersion is found to be largest among households with poor diets i.e. those households with diets high in saturated fats and low in fruits and vegetables.