We reassess the concept of the hypothetical monopolist as a device for relevant market definition. The hypothetical monopolist test (also known as the Small but Significant Non-transitory Increase in Price test) is a clever, intuitive way of thinking the relevant market in antitrust, and is gaining ground in strategic management. The test, however, implicitly disregards resource characteristics in relevant market delineation, focusing exclusively on demand side substitutability. In reassessing the hypothetical monopolist, we make 2 general contributions to the strategy literature. First, using cooperative game theory, we advance a precise resource-based definition of the hypothetical monopolist. Second, we demonstrate how this definition broadens our conventional understanding on 2 important topics: resource complementarities and disruptive innovations. In doing so, we complement and strengthen the hypothetical monopolist test as a device for management (strategic) and public policy (antitrust) analysis. /journal/mde perspectives: The top-down perspective, featuring the vision of the company's headquarter, and the bottom-up perspective, representing the product manager perspective. In a similar vein, we propose that the hypothetical monopolist test be amended, so that its initial, clever intuition can be enhanced by the explicit incorporation of the role of firm resources as understood in the resource-based view (Barney J.B., 1991). This not only makes the test more directly relevant to strategy, but also has, we argue, the added benefit of broadening our understanding of two important topics, namely resource complementarities and disruptive innovation.