This study analyzes the impact of incorporating the Great Train eXpress Line C (GTX-C) station name into apartment complex names on sale prices. Eleven apartment complexes near Indeogwon Station that adopted the name “Indeogwon” were designated as...
This study analyzes the impact of incorporating the Great Train eXpress Line C (GTX-C) station name into apartment complex names on sale prices. Eleven apartment complexes near Indeogwon Station that adopted the name “Indeogwon” were designated as the treatment group, while nearby complexes within a 0.5 km radius served as the control group. Using panel data from 2014 to 2025, we applied Difference-in-Differences and Event Study model, along with robustness checks including parallel trend testing, placebo tests and district-specific time trends. Results show that renaming increased average sale prices per pyeong (3.3m²) by approximately 6.31%, suggesting the emergence of a GTX-C-related naming premium. In contrast, the jeonse market (large deposit, no monthly rent) showed no statistically significant response, and sales volume declined, possibly reflecting delayed transactions due to elevated price expectations. The Event Study analysis revealed that the renaming effect emerged immediately after treatment, became significantly positive from the second to the fifth period, and moderated beyond the sixth period. This pattern suggests that the naming effect was not instantaneous but developed over the short- to medium-term, as market participants gradually incorporated new information and adjusted their expectations. Limitations include the single-case focus and difficulty isolating physical improvement effects. Future research should explore long-term dynamics, user segmentation, and naming effects linked to broader transportation or urban development initiatives.