This document discusses the timing of entry for new products and technologies. It describes three categories of market entrants: first movers, early followers, and late entrants. First movers can gain brand loyalty, technological leadership, preemption of scarce assets, exploitation of buyer switching costs, and benefits of increasing returns. However, first movers also bear high research costs, may lack supply/distribution channels, and face uncertainty in customer requirements. The optimal timing depends on factors like customer preferences, enabling technologies, complements, competitive threats, and first-mover advantages versus costs. Managing entry timing well is complex, and strategies can improve timing options.