Kim, G.-S. . ., Kim, G.-I. ., Rim, G.-N., & 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), 1–14. https://doi.org/10.38157/business-perspective-review.v3i1.224