Barabat, Xyruz Mike M., Bernadene Ianne V. Bernardo, Edmunde Marcel J. Cruz, and Ronaldo R. Cabauatan. 2022. “Unemployment Invariance Hypothesis and Added Worker Effect: Philippines’ Labor Force Determinants”. International Journal of Research in Engineering, Science and Management 5 (11): 156-67. https://journal.ijresm.com/index.php/ijresm/article/view/2443.