SOUTHERN JOURNAL OF AGRICULTURAL ECONOMICS DECEMBER 1990 Analyzing Fresh Vegetable Consumption From Household Survey Data

Abstract he termed the "double hurdle " model. A third ex-To analyze fresh vegetable consumption using planation is embodied in the "purchase infrequen-household survey data, the tobit model and a more cy " model. The model is based on the proposition flexible parameterization to the tobit model-the that, in the case of infrequently purchased goods, "double hurdle " model-were considered. Based on zero expenditures may have been recorded because the likelihood ratio test, the tobit model was rejected the household purchased a stock of the good outside against the "double hurdle " specification. of the survey period. Moreover, the results suggest that the tobit model In analyzing adult women's consumption of ten underestimated the impact of the explanatory vari- food groups, Haines et al. compared the tobit model ables on fresh vegetable expenditures. Other results with Cragg's "double hurdle " model. The indicate that total food expenditures (proxy for in- hypothesis that the tobit model was correctl