States evaluating their Medicaid section 1115 demonstration often use a comparison group design to estimate demonstration impacts. This white paper describes matching methods, that states can use to make the comparison group more similar to the group affected by demonstration policies.
Related Publications for Matthew Niedzwiecki
Matching Methods for the Evaluation of Section 1115 DemonstrationsFeb 28, 2023
Evaluation of the Medicare Care Choices Model: Annual Report 4Apr 13, 2022
Evaluation of the Medicare Care Choices Model’s effects on beneficiaries’ outcomes from January 2016 to March 2021.
Primary Care Practices Providing a Broader Range of Services Have Lower Medicare Expenditures and Emergency Department UtilizationSep 01, 2021
Comprehensiveness is a key element of primary care and is highlighted in several national primary care transformation initiatives.
Understanding the 100 Highest Users of Health and Social Services in San FranciscoSep 01, 2021
Health system leaders and clinicians recognize the importance of integrating data that elucidates both the medical and social needs of patients.
Practice‐Site‐Level Measures of Primary Care Comprehensiveness and Their Associations with Patient OutcomesJun 01, 2021
The authors calculated practice‐site‐level comprehensiveness measures (new problem management and involvement in patient conditions) across 5286 primary care physicians (PCPs) at 1339 practices in the Comprehensive Primary Care initiative evaluation in 2013.
Innovations in Medicaid: Impacts of a Home-Based Intensive Care Model for Complex Medicaid BeneficiariesFeb 28, 2021
This issue brief summarizes Mathematica’s evaluation of Landmark Health’s home-based intensive care model as it was delivered to complex Medicaid and dually eligible beneficiaries in California from 2016-2018. The evaluation assessed the model’s impacts on health care utilization and quality.
The Association of Medicaid Expansion and Racial/Ethnic Inequities in Access, Treatment, and Outcomes for Patients with Acute Myocardial InfarctionNov 11, 2020
The objective of this study was to determine whether the Affordable Care Act’s expansion of Medicaid eligibility was associated with changes in racial disparities in access, treatments, and outcomes after AMI.
A Randomized Trial of Permanent Supportive Housing for Chronically Homeless Persons with High Use of Publicly Funded ServicesOct 01, 2020
The authors evaluated whether randomization to permanent supportive housing (PSH) versus usual care reduces the use of acute health care and other services among chronically homeless high users of county‐funded services.
Effects of Medicaid Expansion on Access, Treatment, and Outcomes for Patients with Acute Myocardial InfarctionApr 23, 2020
Uninsured patients have decreased access to care, lower rates of percutaneous coronary intervention (PCI), and worse outcomes after acute myocardial infarction (AMI).
Characteristics of Academic-Affiliated Health SystemsApr 01, 2020
Several distinct types of relationships between academic-affiliated health systems (AHSs) and medical schools exist. The traditional vision of a medical school having an exclusive relationship with a single AHS is no longer prominent.
Section 1115 Alternative Medicaid Expansions: Summative Evaluation ReportJan 17, 2020
This report presents findings from an evaluation of section 1115 demonstrations in six states—Arkansas, Indiana, Iowa, Michigan, Montana, and New Hampshire—that tested new approaches to administering Medicaid for low-income adults during the period 2014 - 2017.
The Short‐Term Effects of the Earned Income Tax Credit on Health Care Expenditures Among US AdultsDec 01, 2019
The authors conducted difference‐in‐differences analyses, comparing health care expenditures among EITC‐eligible adults in February (immediately following EITC refund receipt) with expenditures during other months, using non‐EITC‐eligible individuals to difference out seasonal variation in health care...
Frequent Emergency Department Users: Focusing Solely on Medical Utilization Misses the Whole PersonNov 30, 2019
Frequent emergency department (ED) users often have complex behavioral health and social needs.
Past Frequent Emergency Department Use Predicts MortalityJan 08, 2019
This groundbreaking study in the January issue of Health Affairs finds that frequent emergency department (ED) users are at higher risk for mortality compared with similar patients receiving emergency care.
A US National Study of the Association Between Income and Ambulance Response Time in Cardiac ArrestNov 30, 2018
Emergency medical services (EMS) provide critical prehospital care, and disparities in response times to time-sensitive conditions, such as cardiac arrest, may contribute to disparities in patient outcomes.
Factors Associated With Emergency Department Use by Patients With and Without Mental Health DiagnosesOct 19, 2018
An association between frequent use of the emergency department (ED) and mental health diagnoses is frequently documented in the literature, but little has been done to more thoroughly understand why mental illness is associated with increased ED use.