本文旨在探討肥胖是否和個人在勞動市場上的表現:就業機會與薪資水準有關；同時並延伸探討服務業與非服務業兩大產業部門對於勞動者的體態和勞動市場表現的關係。首先採用可控制內生性的雙元普羅比模型(Bivariate Probit Model)分析肥胖對於個人就業的影響，而工具變數是採用小孩的身體質量指數(Body Mass Index, BMI)來當作父母的肥胖之工具變數。實證結果發現，肥胖與就業之間確實存在內生性的問題，且肥胖對個人的就業機會呈現顯著的負相關。
　　
在探討肥胖與薪資水準的關係，本文考慮樣本選擇偏誤的問題，透過Heckman(1979)的估計方法的結果顯示，本文所使用的資料並不存在樣本選擇偏誤的問題，故不需進行樣本選擇偏誤的修正。此外，肥胖與薪資水準間亦可能存在內生性的問題，故本文亦採用小孩的 BMI來當作工具變數，且透過二階段最小平方法(Two Stage Least Squares, TSLS)及Hausman的內生性檢定，結果發現肥胖與平均每小時薪資間並不存在內生性的問題，故直接採用最小平方法（Ordinary Least Squares，OLS）估計肥胖對薪資水準的影響。實證結果發現，肥胖對於薪資水準呈現負相關，但不顯著；然而，在納入肥胖與服務業之交互項進行分析時，結果發現，肥胖與服務業之交互項對於薪資水準呈現顯著的負相關。

This study aims to examine the relationship between obesity and individual’s labor market outcome: employment status and wage rate. The study also extends the analysis into service and non-service sectors. Adopting the bivariate probit model and using child's body mass index (BMI) as the instrumental variable of parents’ obesity status, Wald test statistics indicate that there is an endogeneity problem and the empirical results shows that there is a significant and negative correlation between obesity and employment.　
　
As regards to the analysis on examining the relationship between obesity and wage rate, this study firstly uses Heckman (1979)’s selection bias model to detect the selection bias; however, there is no selection bias problem. Then, adopting the two stage least squares regression (TSLS) model and using child's body mass index (BMI) as the instrumental variable of parents’ obesity status to control for the possible endogeneity problem; however, Hausman test does not confirm there is endogeneity. Thus, this study uses ordinary least squares (OLS) regression model and finds that there is a negative but insignificant correlation between obesity and wage rate. The results of the interaction of obesity and service sector show that there is a significant and negative correlation between this interaction and wage rate.

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三、參考網站：
1.食品藥物消費者知識服務網之台灣國民營養調查結果-
http://consumer.fda.gov.tw/Pages/List.aspx?nodeID=92
2.華人健康網-BMI超過25 影響主觀領導魅力-
http://www.top1health.com/Article/262/11380
3.大紀元新聞網-研究顯示：外貌影響薪資與升遷-
http://tw.epochtimes.com/b5/5/4/18/n892089.htm
4.ETtoday新聞網-A&F老愛歧視華人、胖子　美網友號召變流浪漢品牌-
http://www.ettoday.net/news/20130516/208730.htm