Pekkurnaz D. Convergence of Health Expenditure in OECD Countries: Evidence from a Nonlinear Asymmetric Heterogeneous Panel Unit Root Test. J. Rev. Global Econ. [Internet]. 2015 Apr. 16 [cited 2024 Dec. 25];4:76-8. Available from: http://lifescienceglobalca.com/index.php/jrge/article/view/2929