Tobacco Induced Diseases | |
The effects of smoking on obesity: evidence from Indonesian panel data | |
Kitae Sohn1  | |
[1] Department of Economics, Konkuk University, 120 Neungdong-ro, Gwangjin-gu 05029, Seoul, South Korea | |
关键词: Fixed effects model; Panel data; Causality; Indonesia; Obesity; Weight; Smoking; | |
Others : 1234125 DOI : 10.1186/s12971-015-0064-5 |
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received in 2015-04-15, accepted in 2015-11-16, 发布年份 2015 | |
【 摘 要 】
Background
It has been known that smoking is negatively related to weight-related outcomes. However, it has been difficult to determine whether the relationship is causal, and if so, how strong it is. We attempted to estimate the approximately causal effects of smoking on weight, body mass index (BMI), and obesity.
Methods
The Indonesian Family Life Survey provided a sample of over 9000 men aged 15–55 years—each of them was observed in 1993, 1997, 2000 and 2007. The preferred method was a fixed effects model; that is, we related changes in smoking status or smoking intensity to changes in weight-related outcomes, while controlling for time-varying covariates. We also compared these results to those estimated by ordinary least squares and assessed the importance of controlling for time invariant individual heterogeneity.
Results
Although the effects of smoking were precisely estimated in a statistical sense, their size was minuscule: a quitter would gain weight by at most 1 kg, or a smoker would lose weight by the same amount. The results were similar for BMI and obesity. When we did not control for time invariant individual heterogeneity, the size of the relationship was overestimated at least three times.
Conclusions
Smoking exerted little influence on weight, and it was important to control for bias stemming from time invariant individual heterogeneity.
【 授权许可】
2015 Sohn.
【 预 览 】
Files | Size | Format | View |
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20151128040317230.pdf | 512KB | download | |
Fig. 1. | 14KB | Image | download |
【 图 表 】
Fig. 1.
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