The present study aims to quantify the economic effects of sudden increase in food prices in Peruvian households in 2007-2008 and to identify vulnerable households food. The study is part of a series of recent efforts to quantify the economic effects of the sharp Food price shock occurred between 2007 and the third quarter of 2008 in various countries. Unlike other recent studies that focus on little food and effects on food expenditure and the poverty lines in this work we use the calorie deficit of families is central indicator for the analysis of the impact of price shock in the Peruvian case . We estimate demand functions for a set of 14 foods that mean 76% of caloric intake of Peruvian families with a Tobit model of price and income elasticities with respect to the expenditure variables, and thus calculate different responses by socioeconomic groups and hence identify heterogeneous effects according to the level of household spending.
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