Self-Rated Health as Private Information in Predicting Mortality

Abstract

Using a ten-year span of the Korean Labor and Income Panel Study and a logit specification, this study aims to analyze whether self-rated health has private information about future mortality controlling for demographic and socioeconomic characteristics, health behaviors, and critical medical factors. In particular, it is explored whether predictive power of self-rated health varies with age. For that purpose, the data is divided into three age groups consisting of 30-44, 45-54, and 55-69 groups. It is shown that predictive power of self-rated health on mortality exhibits an increasing and non-decreasing pattern with age. Recently, one noticeable phenomenon in the Korean pension market has been that the enrolment into a defined contribution plan has increased compared to a defined benefit plan. Unlike the workers in DB plan, workers in DC plan annuitize wealth upon retirement. Thus, if individuals have more private information about their health at retirement phase than at younger phase in their lifetimes, the annuity markets at retirement age are likely to suffer from more informational problem. Given the empirical results, it may become hard to insure longevity risk for workers in DC plans in Korea compared to those who are enrolled into DB plans.