This paper examines the interaction between television-based home shopping and mobile applications in Korea’s evolving digital market. While previous research has primarily focused on integrating physical and online channels, there is limited understanding of how broadcast media connect with digital platforms, such as mobile apps. In response to the growth of mobile commerce and the ongoing policy debates surrounding TV transmission fees, this study addresses two questions: (1) Can exposure to TV home shopping lead to greater use of the mobile app through mechanisms such as trust formation? (2) How do TV exposure and mobile usage work together to shape user retention? Using monthly panel data from four major home shopping companies in Korea between April 2021 and December 2023, we apply fixed-effects models to identify cross-channel effects. We find that higher TV viewership predicts increased mobile engagement, and that sustained app use, in turn, supports user retention. TV and mobile appear to function as sequential complements rather than substitutes. In this "reverse showrooming" pattern, television builds product credibility and trust through live demonstrations, while mobile apps provide transaction convenience and personalized engagement. This challenges assumptions about media displacement and demonstrates how broadcast and digital platforms can serve distinct yet coordinated functions across the customer journey. By extending channel integration theory to broadcast-digital settings, the study highlights how the nature of TV—its mass reach, regulatory standards, and low-effort exposure—can drive digital activity. Practically, the results indicate that firms and policymakers should consider integrated approaches to managing and regulating cross-channel shopping platforms.
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