The act of invading species is one of the most important drivers of global change in biodiversity and the change in function of both terrestrial and aquatic ecosystems. In this symposium, we will connect ecological and economic theory to efforts to reduce the impacts of invasive species. Thus, the symposium is entirely consistent with the overall theme of the meeting, “Restoration in a Changing World.” Society’s response to nonindigenous species involves ecological and economic factors. Species invasions are caused by economic activities, and, in turn, affect economic activities. Thus social welfare and risk assessment are both determined jointly by ecological and economic processes. This ecological-economic linkage drives interactions between the assessment of risk and the management of risk that are rarely included in bioeconomic models. The symposium will highlight new developments in ecological, economic, and risk analysis frameworks for nonindigenous species. The central public policy considerations are how much of society’s resources should be expended in response to nonindigenous species? And how should resources be allocated between different approaches to prevention and control? To address these questions, the symposium will employ a diversity of voices and perspectives from invasion biology, theoretical biology, and economics. Key results and future challenges will be outlined regarding bioeconomic and risk analysis frameworks for nonindigenous species, with a focus on integrating risk assessment and risk management, including uncertainty distributions, and optimizing prevention and control strategies in a landscape context. The sequence of talks reflects a logical development of symposium themes. The first two talks introduce the overall topics, compare ecological and economic perspectives, and provide some initial case studies. The next three talks analyze different sorts of uncertainty in applications of ecological and risk assessment theory, emphasizing both the current capacity and limitations of risk assessment. The final three talks apply a combination of ecological and economic theory to specific real-world risk management of invasive species, with both terrestrial and aquatic case studies. Finally, the symposium will conclude with an opportunity for further questions from the audience and further discussion among the speakers.