The effect of rising food prices on food consumption: systematic review with meta-regression

作者：R Green, Laura Cornelsen, Alan D. Dangour, Rachel A. Turner, Bhavani Shankar, Mario Mazzocchi, Richard David Smith · 发表于：BMJ · 年份：2013 · DOI：10.1136/bmj.f3703 · 被引用次数：415 · 研究领域：Economics of Agriculture and Food Markets、Obesity, Physical Activity, Diet、Consumer Attitudes and Food Labeling

OBJECTIVE: To quantify the relation between food prices and the demand for food with specific reference to national and household income levels. DESIGN: Systematic review with meta-regression. DATA SOURCES: Online databases of peer reviewed and grey literature (ISI Web of Science, EconLit, PubMed, Medline, AgEcon, Agricola, Google, Google Scholar, IdeasREPEC, Eldis, USAID, United Nations Food and Agriculture Organization, World Bank, International Food Policy Research Institute), hand searched reference lists, and contact with authors. STUDY SELECTION: We included cross sectional, cohort, experimental, and quasi-experimental studies with English abstracts. Eligible studies used nationally representative data from 1990 onwards derived from national aggregate data sources, household surveys, or supermarket and home scanners. DATA ANALYSIS: The primary outcome extracted from relevant papers was the quantification of the demand for foods in response to changes in food price (own price food elasticities). Descriptive and study design variables were extracted for use as covariates in analysis. We conducted meta-regressions to assess the effect of income levels between and within countries on the strength of the relation between food price and demand, and predicted price elasticities adjusted for differences across studies. RESULTS: 136 studies reporting 3495 own price food elasticities from 162 different countries were identified. Our models predict that increases in the price of a...