The competitive market environment has evolved from a physical market environment (PME) to an Internetenabled market environment (IME) encompassing the physical and electronic marketplaces. At the same time, an increasing number of information products are available in both analog and digital forms. For information products in digital form, the IME also serves as a distribution channel. Such developments raise questions concerning the extent to which extant perspectives on first-mover advantage developed in the context of the PME hold in the IME, generally, and for information products specifically. We address this issue by developing a conceptual framework that focuses on selected sources of first-mover advantage delineated in the extant literature and advance propositions concerning sources that will have a greater or lower effect in the IME relative to the PME. A central message for firstmovers in the IME that emerges from our conceptual analysis is to focus on achieving superior positions in resources that would enable them to get close to the customers fast, create switching costs, and retain them though ongoing investments in multi-faceted innovations. A second message that emerges for first-movers in the IME is they must take note of and make strategic adjustments for the potentially diminished significance of some traditional sources of first-mover advantage. These sources include spatial preemption, preemptive investment in capacity, and consumers' choice behavior under conditions of uncertainty about product quality. We discuss the implications for further conceptual and empirical work in this area of increasing significance.Keywords Competitive strategy . First-mover advantage . Information products . Digital information products . Electronic commerce . Internet and marketing Major changes, discontinuities, and disruptions in the competitive market environment often necessitate a critical reassessment of the applicability, transferability, relevance, and/or need for refinement of extant marketing perspectives. A relatively recent development is the emergence of the Internet as a major component of the competitive strategy of businesses. Concurrently, the market environment has evolved from a physical market environment (PME) to an Internet-enabled market environment (IME) encompassing the physical and electronic marketplaces. Another recent development is the increasing availability of information products in digital form. While the availability of information products in digital form (e.g., music and software on CDs) precedes the emergence of the IME, the Internet in recent years has also emerged as an important channel for their distribution (e.g., direct distribution of music and software over the Internet). Against this backdrop, we revisit extant perspectives on first-mover advantage, a topic that has consistently retained an important