Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
We investigate the long‐run dynamic interaction between fashion (brand loyalty) and industry structure. We analyze how this interaction affects the importance of fashion in the market for a product in the different stages of its life and characterize conditions under which fashion loses or preserves its relevance over time. The model can explain why some products survive fashion changes. (JEL D21, L0)