The Effect of the Value of Time on Food Consumption Patterns in Developing Countries: Evidence from Sri Lanka
利用斯里兰卡城市家庭数据，发现女性时间的机会成本会影响家庭食品消费模式，通过估计大米、面包等需求方程，并采用Heckman方法纠正样本选择偏差。
Abstract This study shows that the opportunity cost of women's time can affect household food consumption patterns in developing countries. Demand equations for rice, bread, and the ratio of bread to total cereal consumption are estimated for urban Sri Lankan households. The demand specification, which is based on the “New Household Economics,” includes as explanatory variables the woman's estimated market wage and the household's “full income,” and alternatively “observed income.” Wages are estimated using the Heckman procedure to correct for sample selection bias.