Topic–Subjectivity Dynamics and Review Usefulness in Fintech Apps: A PPM-Based Zero-Inflated Analysis

Sunnyoung Lee¹ · Minkyu Ku² · Sang-Hyeak Yoon³

¹ Teaching Professor, Department of Business Administration, College of Business, Dongguk University, ² Department of Business Administration, College of Business, Dongguk University, ³ Assistant Professor, Department of Management Information Systems, College of Business, Dongguk University

DOI: https://doi.org/10.17287/kmr.2026.55.2.953