The Estimation of Food Expenditures From Household Budget Data in the Presence of Bulk Purchases
利用1990-1991年西班牙家庭预算调查数据，比较了三种估计年度食品支出的方法，发现官方方法和最佳替代方法在通货膨胀率上相似，但在不平等估计上存在差异。
The aim of this article is the estimation of annual food expenditures with limited information about bulk purchases with data from a Spanish household-budget survey for 1990—1991. Three alternatives are compared. The first, currently used for official purposes, does not use all the information. The second uses all the available information in a rough way. The third assumes a formal model for the unknown frequency of purchases. The three alternatives are compared by a regression model that should be homogeneous with respect to the dummy variables that represent the partial information of the groups and should show a distinct pattern of outliers under each alternative. Finally, we study the effect of the official and the best alternative on food inflation and inequality measures. We find that they lead to similar inflation rates but to different inequality estimates.