Re-visiting the Health Care Luxury Good Hypothesis: Aggregation, Precision, and Publication Biases?

While a growing literature examining the relationship between income and health expenditures suggests that health care is a luxury good, this conclusion is contentiously debated due to heterogeneity of the existing results. This paper tests the luxury good hypothesis using meta-regression analysis, taking into consideration publication selection, precision, and aggregation bias. The findings suggest that publication bias exists, a result that is robust irrespectively of the tests employed. Precision and aggregation bias also appear to play a role in the generation of estimates. The corrected income elasticity estimates range from 0.26 to 0.84, although we cannot reject the luxury good hypothesis for some of the performed corrections.