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Using a difference in the regression discontinuity design, we found that among Whites, Part D was associated with increases in polypharmacy and \u201cbroadly defined\u201d PIM use, while the use of \u201calways avoid\u201d PIM remained unchanged. Conversely, Blacks and Hispanics reported no changes in such drug utilization patterns.<\/jats:p>","DOI":"10.1002\/hec.4766","type":"journal-article","created":{"date-parts":[[2023,10,21]],"date-time":"2023-10-21T10:38:58Z","timestamp":1697884738000},"page":"137-152","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["The effect of prescription drug insurance on the incidence of potentially inappropriate prescribing: Evidence from Medicare Part D"],"prefix":"10.1002","volume":"33","author":[{"given":"Donghoon","family":"Lee","sequence":"first","affiliation":[{"name":"Department of Health Policy and Management College of Health Science, BK21 FOUR R&amp;E Center for Learning Health Systems, Korea University  Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"SangJune","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Health Policy London School of Economics  London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7716-8317","authenticated-orcid":false,"given":"Jerome A.","family":"Dugan","sequence":"additional","affiliation":[{"name":"Department of Health Systems and Population Health University of Washington  Washington Seattle USA"},{"name":"Evans School of Public Policy and Governance University of Washington  Washington Seattle USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,10,21]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1475\u20106773.2011.01244.x"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jhealeco.2016.06.004"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/hec.3853"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s40615\u2010015\u20100101\u20103"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.1001\/archinte.1991.00400090107019"},{"key":"e_1_2_11_7_1","doi-asserted-by":"publisher","DOI":"10.1001\/jama.2012.362"},{"key":"e_1_2_11_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1532\u20105415.2004.52118.x"},{"key":"e_1_2_11_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/1475\u20106773"},{"key":"e_1_2_11_10_1","doi-asserted-by":"publisher","DOI":"10.1146\/annurev\u2010publhealth\u2010031210\u2010101218"},{"issue":"2","key":"e_1_2_11_11_1","first-page":"63","article-title":"Racial and ethnic disparities in prescription coverage and medication use","volume":"25","author":"Briesacher B.","year":"2003","journal-title":"Health Care Financing Review"},{"key":"e_1_2_11_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140\u20106736(16)32585\u20105"},{"key":"e_1_2_11_13_1","doi-asserted-by":"publisher","DOI":"10.1257\/aer.98.5.2242"},{"key":"e_1_2_11_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.annepidem.2015.01.018"},{"key":"e_1_2_11_15_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10754\u2010009\u20109056\u20104"},{"key":"e_1_2_11_16_1","doi-asserted-by":"publisher","DOI":"10.1111\/jgs.13320"},{"key":"e_1_2_11_17_1","volume-title":"Waste and inefficiency in the US health care system\u2014clinical care: A comprehensive analysis in support of system\u2010wide improvements","author":"Delaune J.","year":"2008"},{"key":"e_1_2_11_18_1","doi-asserted-by":"publisher","DOI":"10.1093\/geronb\/gbw030"},{"issue":"9","key":"e_1_2_11_19_1","first-page":"e315","article-title":"Medicare Part D and potentially inappropriate medication use in the elderly","volume":"18","author":"Donohue J. 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