Byambajav E-A, Artskhuu U. DETERMINING THE COMPETITIVENESS OF ECONOMIC SECTORS USING AN INDEX METHOD BASED ON PRINCIPAL COMPONENT ANALYSIS. JBAI [Internet]. 2026 May 21 [cited 2026 Jun. 13];12(1):30-47. Available from: https://journal.num.edu.mn/BusinessAndInnovation/article/view/11006