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

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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.
Publisher
WILEY
Issue Date
2020-01
Language
English
Article Type
Article
Citation

JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES A-STATISTICS IN SOCIETY, v.183, no.1, pp.3 - 36

ISSN
0964-1998
DOI
10.1111/rssa.12482
URI
http://hdl.handle.net/10203/272048
Appears in Collection
MT-Journal Papers(저널논문)
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