Abstract
Many US workers have access both to an employee assistance plan (EAP) and to employer health insurance that includes behavioral health services. We examine whether EAP services substitute for outpatient behavioral health care services covered by the health plan, in settings where the employer has purchased both products jointly. We analyze administrative data for 26,464 patients enrolled with a managed behavioral health organization in 2005. General linear models are used to predict visits and spending for regular outpatient care. We also use instrumental variable analysis to test for endogeneity of the number of EAP visits covered. Having more generous EAP coverage predicts fewer regular outpatient visits, and lower spending for outpatient care. This supports the idea that the two types of care are to some extent perceived as substitutes, although patients also appear to perceive that EAP services offer something distinct from regular outpatient care.