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 (Jan. 2021), 1–14. DOI:https://doi.org/10.38157/business-perspective-review.v3i1.224.