This comment provides a critical assessment of Frimpong et al. "Impact of the 1115 Behavioral Health Medicaid Waiver on Adult Medicaid Beneficiaries in New York State," published in Health Services Research (2021) [DOI: 10.1111/1475-6773.13657]. The authors reported a decline in inpatient utilization due to the Waiver. However, they failed to disclose that inpatient utilization did not decline when using an alternative difference-in-differences regression specification. Therefore, the decline in inpatient utilization appears to be an artifact of the authors' regression specification. I provide an explanation of these discrepant findings, drawing from recently published methodological studies on differences-in-differences and matching on outcomes.
{"title":"Comment on Frimpong et al.: Impact of the 1115 Behavioral Health Medicaid Waiver on Adult Medicaid Beneficiaries in New York State","authors":"S. Lindner","doi":"10.2139/ssrn.3862895","DOIUrl":"https://doi.org/10.2139/ssrn.3862895","url":null,"abstract":"This comment provides a critical assessment of Frimpong et al. \"Impact of the 1115 Behavioral Health Medicaid Waiver on Adult Medicaid Beneficiaries in New York State,\" published in Health Services Research (2021) [DOI: 10.1111/1475-6773.13657]. The authors reported a decline in inpatient utilization due to the Waiver. However, they failed to disclose that inpatient utilization did not decline when using an alternative difference-in-differences regression specification. Therefore, the decline in inpatient utilization appears to be an artifact of the authors' regression specification. I provide an explanation of these discrepant findings, drawing from recently published methodological studies on differences-in-differences and matching on outcomes.","PeriodicalId":153052,"journal":{"name":"SIRN: Financing (Medicaid) (Sub-Topic)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121920965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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