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The effect of general health checks on healthcare utilization: accounting for self‐selection bias

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  • Sungwook Yoon
  • Duk Bin Jun
  • Sungho Park

Abstract

The general health check is one of the most common preventive healthcare measures in many countries. In this study, we propose an empirical approach which jointly models the decision to obtain a general health check and healthcare utilization, tackling the self‐selection problem by using eligibility to obtain a health check for free as an instrumental variable. Eligibility has some exogenous variations by design and this helps us to partial out the effect of general health checks from self‐selection biases. We apply the model to a large 12‐year panel data set provided by the Korean National Health Insurance Service. We find that participation in the general health check increases healthcare utilization and ignored self‐selection generates substantial upward bias in the estimates. We also find that the health check effect shows noteworthy heterogeneity across gender and income groups. Before health checks, healthcare utilization of males and people in low income groups is lower than those of females and people in high income groups respectively. However, these become comparable across different groups after health checks. This finding implies that general health checks can be an effective vehicle for health equity.

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  • Sungwook Yoon & Duk Bin Jun & Sungho Park, 2020. "The effect of general health checks on healthcare utilization: accounting for self‐selection bias," Journal of the Royal Statistical Society Series A, Royal Statistical Society, vol. 183(1), pages 3-36, January.
  • Handle: RePEc:bla:jorssa:v:183:y:2020:i:1:p:3-36
    DOI: 10.1111/rssa.12482
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    1. Jinhwan Park & Duk Bin Jun & Sungho Park, 2022. "The effect of epidemic outbreak on healthcare usage: Lessons from the 2015 Middle East respiratory syndrome outbreak in South Korea," Journal of the Royal Statistical Society Series A, Royal Statistical Society, vol. 185(3), pages 1319-1343, July.

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