The Center for Advancing Health Services, Policy & Economics Research merged its monthly meetings (formerly known as CHEPAR) with the Center for Administrative Data Research users’ group meeting to create the Health Services Research (HSR) Collaborative seminar series. November’s meeting will feature a presentation from Hefei Wen, PhD, Assistant Professor, Department of Population Medicine, Harvard Medical School & Harvard Pilgrim Health Care Institute. She will present Impact of Medicare Opioid Safety Policy on Disabled Beneficiaries.