“…In recent years, a large and growing body of literature has investigated the determinants of healthcare expenditure, such as business cycles (2), economic overheating (3), economic activity (4), economic crisis (1,5), and other factors (6)(7)(8)(9)(10). The most studied determinant is economic growth, which is an important demand-side driver of healthcare expenditure (2,11,12). Some studies show that healthcare expenditure is significantly positive with GDP because the demand for healthcare services will rise with the increase of income (4,11,13).…”