Under the Program of Research on the Economics of Invasive Species Management (PREISM), ERS conducts intramural research and funds extramural research to support the economic basis of decisionmaking concerning invasive species issues, policies, and programs. The report, Program of Research on the Economics of Invasive Species Management: Fiscal 2003-2011 Activities details the objectives and activities of PREISM and reports important accomplishments for fiscal years 2003-2011. Included are descriptions of the extramural research program and all funded projects, and a list of project outputs.