Food policies and obesity in low- and middle-income countries
研究了低收入和中等收入国家中，对不健康食品的关税和政府补贴如何影响个人体重，发现关税降低和补贴增加与超重和肥胖率上升相关，且对贫困人群影响更大。
Understanding the public health implications of food policies is crucial to combat recently increasing overweight and obesity rates in many low-and-middle income countries (LMICs). This study examines the implication of food policies, mainly tariff rates on “unhealthy” foods (sugar and confectionery products as well as fats and oils) and governments’ subsidies, on individuals’ body weight outcomes. We compile several macro- and micro-level datasets that provide macro-level information on food policies and micro-level anthropometric data for several LMICs. We exploit temporal dynamics in tariff rates on “unhealthy” foods and governments’ spending on subsidies to estimate fixed effects models characterizing the evolution of body weight outcomes. We find that temporal dynamics in tariff rates on unhealthy and energy-dense foods are significantly and negatively associated with body weight. Conditional on several observable and time-invariant unobservable factors, a decrease in tariff rates on sugar and confectionary foods or fats and oils is associated with an increase in overweight and obesity rates. On the other hand, an increase in subsidy rate, as a share of government expenditure, is significantly associated with higher overweight and obesity rates. Interestingly, we find that the implications of these food policies are more pronounced among poorer individuals. This may be explained by the fact that poorer households usually spend a larger share of their income on food consumption or unhealthy foods; and that poorer individuals are often beneficiaries of government subsidies in many LMICs. These findings have important implications for informing public health policies in LMICs, which are experiencing an unprecedented rise in overweight and obesity rates.