Abstract
The aim of this paper is to estimate the effects of seeking medical care on missing work. Specifically, our case study explores the question: Does visiting a medical provider cause an employee to miss work? To address this, we employ a model that can consistently estimate the impacts of two endogenous binary regressors. The model is based on three equations connected via a multivariate Gaussian distribution, which makes it possible to model the correlations among the equations, hence accounting for unobserved heterogeneity. Parameter estimation is reliably carried out via a trust region algorithm with analytical derivative information. We find that, observationally, having a curative visit associates with a nearly 80% increase in the probability of missing work, while having a preventive visit correlates with a smaller 13% increase in the likelihood of missing work. However, after addressing potential endogeneity, neither type of visit appears to significantly relate to missing work. That finding also applies to visits that occur during the previous year. Therefore, we conclude that the observed links between medical usage and absenteeism derive from unobserved heterogeneity, rather than direct causal channels. The modeling framework is available through the R package GJRM.
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The first two authors were supported by the Engineering and Physical Sciences Research Council [EP/T033061/1].
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Appendix
Appendix
Code to simulate data and estimate trivariate binary models.
For the case without instrument, v3 is dropped from the equations above. To allow the error terms to be Student’s t (with two degrees of freedom) or \(\chi ^2\) (with two degrees of freedom) distributed, respectively, the above R code was be easily modified by replacing
with
or with
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Filippou, P., Marra, G., Radice, R. et al. Estimating the Impact of Medical Care Usage on Work Absenteeism by a Trivariate Probit Model with Two Binary Endogenous Explanatory Variables. AStA Adv Stat Anal 107, 713–731 (2023). https://doi.org/10.1007/s10182-022-00464-6
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DOI: https://doi.org/10.1007/s10182-022-00464-6