Ulman, Paweł, Agnieszka Wałęga, and Grzegorz Wałęga. 2017. “Is Health Status a Determinant of The Economic Activity? Some Evidence From Poland”. Acta Universitatis Lodziensis. Folia Oeconomica 2 (328):[39]-54. https://doi.org/10.18778/0208-6018.328.03.