“…According to this view, human capital input augments the production activity without increasing the total factor productivity, that is, the accumulation of human capital increases productivity through the input factor only. The second strand of literature shared the perspective that human capital is essential to increase total factor production, this channel is termed the advanced channel of human capital (Vandenbussche, Aghion & Meghir, 2006;Romer, 1990;Aghion & Howitt, 1992;Nelson & Phelps, 1990;Schultz, 1961;Becker, 1962;Nelson & Phelps, 1966).The advanced channel includes investment in research and development and the enhancement of skills to adapt and diffuse new technologies.While another strand of literature documented that no significant connection between human capital channels and productivity due to many factors, such as the effect of external shocks from different production processes and service delivery (Li, Lai, Wang & Zhao, 2016). pointed out that understanding the connection between human capital and productivity does not only depend on other factor inputs but on the differences among the level of human capital in each given countries.…”