Across industries, firms have adopted e-business initiatives to better manage their internal business processes as well as their interfaces with the environment. In this study, a unified framework that captures the antecedents of e-business adoption, adoption intensity, and performance outcomes is proposed and empirically tested using data collected from senior managers in four technology-intensive industries. Applying a framework that captures the intensity of e-business adoption across four business process domains, the authors find that the antecedents and performance outcomes of e-business adoption are best studied in a process-specific context. They find, for example, that while the communication and internal administration aspects of e-business positively affect performance outcomes, the more high-profile activities related to online order taking and e-procurement do not. The authors' findings provide the foundation for a more rigorous study of e-business.