Kim, G.-S. . ., Kim, G.-I. ., Rim, G.-N. and Jang, S.-N. (2021) “Methods for Comprehensive Analysis of the Economic Effectiveness of Business Activities: Special Reference to R & D Expenditure”, Business Perspective Review, 3(1), pp. 1–14. doi: 10.38157/business-perspective-review.v3i1.224.