An ad hoc committee will plan and convene a workshop exploring the potential uses of simulation and other types of modeling for the purpose of selecting and refining potential strategies (e.g., ranging from interventions to investments) to improve the health of communities and the nation's health. The committee will develop the agenda and identify meeting objectives, select appropriate speakers, and moderate the discussions. The workshop will include relevant examples and approaches from health and non-health settings, with a focus on work that could inform local, state, and national-level decision makers. Given the growing interest in novel ways to finance population health improvement, the workshop may include a presentation on ways that modeling could inform the uses of the so-called health dividend (savings from increasing efficiency in health care delivery) in particular, and/or national investments in the determinants of health in general. A summary of the presentations and discussion at the workshop will be prepared by a designated rapporteur in accordance with institutional guidelines.