| Summary: | 博士 === 淡江大學 === 產業經濟學系博士班 === 103 === Essay 1: This paper examines the negative effect of diabetes on employment by gender and aged group. It analyzes the 1996 Nutrition and Health Survey in Taiwan (NAHSIT) and two waves of National Health Interview Survey of Taiwan (2001, 2005). Allowing for endogeneity of diabetes, it uses a bivariate probit model with instrumental variables, including family history of diabetes and area prevalence rates of diabetes. Due to lack of family history of diabetes and insufficient variations of the area prevalence rates of diabetes, the findings from the 1996 and 2001 wave are not totally according to expectation. Contrastly, the analysis of the 2005 data does not suffer similar constraints. The negative effect for middle-aged and older males (aged 40 to 64) is statistically significant, on the order of -24%. Most effects are either small or insignificant for other groups.
Essay 2: This study examines whether weight control ameliorates the effect of diabetes on employment among middle-aged and older adults (aged 40 to 64) by gender and weight group. It analyzes two waves of National Health Interview Survey of Taiwan (2001, 2005). Allowing for endogeneity of diabetes and weight control, it uses a trivariate probit model with instrumental variables, including family history of diabetes and area prevalence rates of diabetes and weight control. Due to lack of family history of diabetes and insufficient variations of the two area prevalence rates, the findings from the 2001 wave are not totally according to expectation. Contrastly, the analysis of the 2005 data does not suffer similar constraints. The moderating effect for those overweight or obese (defined as BMI 24) males is statistically significant, on the order of 1.98%. Most effects are either small or insignificant for other groups. Taking into account the moderating effect for overweight or obese, middle-aged and older males will enhance completeness of cost-benefit analysis in evaluating weight control policy.
Essay 3: This paper examines the negative impact of diabetes on income by gender and aged group. It analyzes two waves of National Health Interview Survey of Taiwan (2001, 2005). Besides exogeneity of diabetes, this paper also allows for endogeneity of diabetes using linear regression, ordered probit model and semi-nonparametric ordered probit model combined with the control function appaoach. The instrumental variables include family history of diabetes and area prevalence rates of diabetes. The results show that the negative impact of diabetes on income is either small or insignificant using the exogeneity assumption of diabetes. Allowing for endogeneity of diabetes, the negative effect for middle-aged and older males (aged 40 to 64), in contrast, becomes statistically significant. But for female and other aged groups the effects are either small or insignificant.
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