Jong-eun Lee Sejong University, Economics   Neung-Dong-Ro 209 Gwang-Jin-Gu Economics, Sejong University Seoul, 서울특별시 05006 South Korea   LJONGEUN@sejong.ac.kr   https://sites.google.com/view/jong-eun-lee/           JEL Areas: O3 : Technological Change; Research and Development: General J3 : Wages, Compensation, and Labor Costs: General