Health economics is generally focused on how healthcare resources are used to produce the greatest benefit to the population. Outcomes research seeks to evaluate the effect of healthcare interventions on patients. Health economics and outcomes research (HEOR) is the union of these two fields, with them working together to provide powerful data and insights for healthcare decision-makers. It is a scientific discipline that is used to complement traditional clinical development information (i.e., efficacy, safety, quality) to guide decision-makers regarding patient access to specific drugs and services.