Suboptimal provision of preventive healthcare due to expected enrollee turnover among private insurers

Many preventive healthcare procedures are widely recognized as cost‐effective but have relatively low utilization rates in the US. Because preventive care is a present‐period investment with a future‐period expected financial return, enrollee turnover among private insurers lowers the expected return of this investment. In this paper, I present a simple theoretical model to illustrate the suboptimal provision of preventive healthcare that results from insurers ‘free riding’ off of the provision from others. I also provide an empirical test of this hypothesis using data from the Community Tracking Study's Household Survey. I use lagged market‐level measures of employment‐induced insurer turnover to identify variation in insurers' expectations and test for the effect of turnover on several different measures of medical utilization. As expected, I find that turnover has a significantly negative effect on the utilization of preventive services and has no effect on the utilization of acute services used as a control. Copyright © 2009 John Wiley & Sons, Ltd.