The goal of this study is to investigate the effects of brand equity of constituent brand on the
co-branding brand equity and brand attitudes. Furthermore, this study examined the moderating role
of self-regulatory focus. In this experimental study, a 2(brand equity of constituent brand: low vs. high)
× 2(self-regulatory focus: prevention-oriented vs. promotion-oriented) between-subject factorial
design was conducted with a total of 200 college students. Findings of this research revealed that the
brand equity of constituent brand positively affect co-branding brand equity and co-branding brand
attitudes. Also, moderating role of self-regulatory focus was found in that when the brand equity of
constituent brand is low, promotion-focused consumers tend to evaluate co-branding between two
dissimilar product categories more favorably than prevention-focused consumers. However, no such
effect was found when the brand equity of constituent brand is high. Theoretical and practical
implications as well as suggestions for future research in this area are provided.