There has been concern about the dramatic growth in obesity seen in developed countries. This paper advances the view that a neoclassical interpretation of weight growth that relies on changing incentives does surprisingly well in explaining the observed trends, without resorting to psychological, genetic, or addictive models. Although the recent rise in obesity has attracted attention, weight growth is not a recent phenomenon (Dora Costa and Richard Steckel, 1995). Weight has been rising consistently over the past 150 years, particularly during the immediate post-World War II period. As Figure 1 illustrates, the secular growth in weight has been accompanied by modest growth, or even declines, in calorie intake (Judith Jones Putnam and Jane E. Allshouse, 1999). This suggests the importance of both rising food intake and declining physical activity. The calorie and weight trends have coincided with a decline in the relative price of food, of around 0.2 percentage points annually, from 1950 to 2000 (Lakdawalla and Philipson, 2002).
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机译:有人担心发达国家出现肥胖症的急剧增长。本文提出了这样一种观点,即依靠变化的激励因素对体重增长进行的新古典解释在解释观察到的趋势方面表现出奇地好,而无需求助于心理,遗传或成瘾模型。尽管最近肥胖的增加引起了人们的注意,但体重增长并不是最近的现象(Dora Costa和Richard Steckel,1995)。在过去的150年中,重量一直在不断增加,特别是在第二次世界大战后时期。如图1所示,体重的长期增长伴随着卡路里摄入量的适度增长,甚至下降(Judith Jones Putnam和Jane E. Allshouse,1999)。这表明增加食物摄入和减少运动量的重要性。从1950年到2000年,卡路里和体重的变化趋势与食物的相对价格每年约0.2个百分点的下降同时发生(Lakdawalla和Philipson,2002)。
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机译:液压测试设备的技术综合体ELEMENTS换热单元和热交换器的换热单元,用于液压系统的管道的夹紧装置,用于管道设备的液压测试的液压系统,用于弯曲管道的液压测试的安装液压系统MACHINE,液压测试台弯管机,方法液压测试弯管单元(RU),液压系统液压测试设备和热交换器单元STAND FOR DRY MACHINE换热单元(可选)