A SILVER LINING? THE CONNECTION BETWEEN GASOLINE PRICES AND OBESITY
研究发现汽油价格上涨与体重下降相关，因为人们更多步行、减少外出就餐。估计1979-2004年间肥胖率上升的8%可归因于汽油实际价格下降，永久性每加仑涨价1美元可使美国超重和肥胖率分别降低7%和10%。
I find evidence of a negative association between gasoline prices and body weight using a fixed effects model with several robustness checks. I also show that increases in gas prices are associated with additional walking and a reduction in the frequency with which people eat at restaurants, explaining their effect on weight. My estimates imply that 8% of the rise in obesity between 1979 and 2004 can be attributed to the concurrent drop in real gas prices, and that a permanent $1 increase in gasoline prices would reduce overweight and obesity in the United States by 7% and 10%.