the market evolution and sales take off of product innovations rajshree agarwal barry l bayus university illinois at urbana champaign north carolina abstract in contrast to prevailing supply side explanation that price decreases are key driver a we argue outward shifting demand curves lead our fundamental idea is new markets initially low since first commercialized forms primitive then as firms enter actual perceived quality improves prices possibly drop which leads provide empirical evidence for this explore relationship between times firm entry sample consumer industrial us over past 150 years based on proportional hazards analysis find dominates other factors explaining observed also no mediates time interpret these results supporting shifts during early
