Choonjoo Lee Korea national defense university   Korea National Defense University Graduate School of National Defense, Rm#508 Yangchon-Myun, Hwangsanbeolro1040 Nonsan, Chungcheongnamdo 33021 Republic of Korea   bloom.rampike@gmail.com             JEL Areas: O3 : Technological Change; Research and Development: General C6 : Mathematical Methods and Programming: General