This study examined gender differences in the relationship between weight index and wage income, focusing on factors affecting wage income reduction, particularly illness and unobserved factors of discrimination. Analysis revealed that while obese men...
This study examined gender differences in the relationship between weight index and wage income, focusing on factors affecting wage income reduction, particularly illness and unobserved factors of discrimination. Analysis revealed that while obese men experienced increased wage income compared to the normal weight, women experienced a decrease. This trend is particularly pronounced among those aged 19 to 34, suggesting that the wage reduction effect associated with obesity is greater for relatively younger women. By occupation, male wages increase for the obese group in managerial, clerical, and service roles, while female wages decrease in clerical roles. By age group, the wage reduction is most prevailing among workers aged 19–34. Obesity-related illnesses are found to cause these wage reductions, accounting for 0.2% points decrease for men and 0.3–0.7% points for women. To analyze unobserved discriminating factors affecting obese women, I added factor variable - underweight/normal/obesity - and female interaction terms. This reveals that obese women's wages decreases more than those of normal-weight and underweight groups, confirming that the factor “being an obese woman” influences wage reduction. Analysis using the Oaxaca-Blinder Decomposition to explain the gender wage gap shows that the unexplained portion of the difference is larger for the obese group compared to the normal weight, with this gap being particularly prominent in the 19-34 age.