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Center for Health System Sustainability

Publications

The latest publications from the Center for Health System Sustainability

Publications

The latest publications from the Center for Health System Sustainability

See more CHeSS publications
JAMA Network Open

Homicide Mortality Among Female Adolescents and Women Aged 15 to 44 Years and US State Abortion Policies

October 16, 2026
Question: Did homicide of females aged 15 to 44 years (hereinafter, women of reproductive age) recover uniformly after the COVID-19 surge, or did post-2022 trajectories diverge across state abortion policy environments?

Findings: In this study of US mortality data from 2016 through 2024, national homicide mortality decreased after the COVID-19 surge, but post-Dobbs trajectories diverged between states with and without sustained abortion bans. The fitted homicide rate of women of reproductive age in states with total or near-total abortion bans was 7% higher than the modeled counterfactual in 2023 and 15% higher in 2024, corresponding to an estimated 48 and 87 excess deaths, respectively.

Meaning: The findings suggest that national decreases in homicide mortality may mask widening differences in homicide mortality among women of reproductive age across state abortion policy environments.
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NEJM

Clinical Trial Prediction Markets — Information, at What Cost?

October 7, 2026
In July 2026, the online prediction-market platform Kalshi announced that users would soon be able to bet on the results of in-progress clinical trials. One such “contract” available for wagers, for example, asks whether POLARIS-AD, a phase 3 trial of the experimental Alzheimer’s drug AR1001, will meet its primary end point. Although heavily focused on sports betting, commercial prediction markets have expanded into areas including interest rates, elections, weather, and the Academy Awards. Kalshi is entering the drug-development space with contracts on end points in large, late-stage trials but is considering broadening its scope to include earlier-phase trials and additional outcomes, such as the number of reported adverse events for a drug. Other major platforms, including Polymarket, are also introducing betting on drug development.
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JAMA Internal Medicine

Policy and Design Considerations for Most-Favored-Nation Drug Pricing

September 28, 2026
Individuals in the US make up less than 5% of the global population but account for half of global drug spending, frequently paying prices 3 to 4 times higher than in peer countries. These high prices strain public budgets and affect patients directly, with 1 in 4 adults reportedly not filling a prescription because of cost.

The Trump Administration has made narrowing the gap between US drug prices and those in other countries central to its health care agenda through what it calls most-favored-nation (MFN) drug pricing. According to the administration, the goal of MFN is not only to lower US drug prices, but also to encourage manufacturers to raise prices abroad so that other countries pay their fair share of the costs of pharmaceutical innovation.

MFN’s emphasis on fairness has powerful political appeal. The pharmaceutical industry has successfully opposed health technology assessment in Medicare by raising concerns about rationing care. It is harder to argue that a drug should cost far more at a pharmacy in Niagara Falls, New York, than at a pharmacy just across the border in Niagara Falls, Canada. The same intuition applies across greater distances: why should a roofer in Frankfort, Kentucky, pay more for cancer treatment than a banker in Frankfurt, Germany?
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JAMA

Patents on Small-Molecule Drugs Approved by the US Food and Drug Administration, 1990-2019

September 28, 2026
Importance: Patent protection allows pharmaceutical companies to charge high prices for prescription drugs during periods of market exclusivity, and their expiration usually defines when generic competitors can enter the US market. Patents on drug active ingredients are classified as primary patents, while patents on formulations, methods of use, and delivery devices are nonprimary.

Objective: To evaluate how pharmaceutical patent portfolios for US Food and Drug Administration (FDA)–approved drugs have evolved over time.

Evidence Review: Patents on small-molecule drugs approved by the FDA from 1990 to 2019 were examined and assessed for changes in the number and types of patents per product. The additional duration of total patent exclusivity associated with each patent type was quantified, and how often patents of each type were enforced against generic manufacturers in litigation was determined.

Findings: The FDA approved 1981 small-molecule drugs during the study period, and manufacturers listed 10 940 patents on these drugs. The mean number of patents per drug increased from 2.1 in 1990 to 6.9 in 2019, driven primarily by nonprimary patents. The mean number of nonprimary patents per drug rose from 1.2 in 1990 to 5.6 in 2019. Nonprimary patents represented majorities of FDA-listed patents (84% [9236/10 940]) and litigated patents (87% [4586/5253]). Nearly all patents listed after drug approval were nonprimary (96% [4874/5064]), and these patents extended market exclusivity by a mean of 6.1 years (SD, 5.8 years) and a median of 4.7 years (IQR, 0.2-10.1 years).

Conclusions and Relevance: Pharmaceutical patent portfolios have grown over the last 2 decades. These portfolios have largely been built on nonprimary patents, which are then enforced against generic firms at higher rates than primary patents. Large patent portfolios can complicate routine generic competition and prolong periods of high drug prices.
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Health Affairs Scholar

Medicare spending and most-favored-nation pricing models

September 19, 2026
Most-favored-nation (MFN) pricing is central to the Trump administration's prescription drug agenda. It aims to prevent drug companies from charging higher prices in the United States than in other developed countries. In December 2025, the Centers for Medicare and Medicaid Services proposed 2 mandatory MFN demonstration models: GLOBE for Medicare Part B and GUARD for Medicare Part D. Both models would require manufacturers to pay Medicare rebates when US prices exceed international benchmarks.

The administration has separately announced voluntary MFN agreements with 26 drug manufacturers under which participating companies provide MFN pricing in Medicaid, offer direct-to-consumer discounts, make launch-price commitments, and invest domestically.3 The agreements also appear to exempt participating manufacturers from other federal pricing initiatives, including GLOBE and GUARD. At least 10 manufacturers have publicly disclosed or confirmed exemptions from Medicare pricing demonstration models in securities filings, investor disclosures, earnings calls, and comments to the Centers for Medicare and Medicaid Services. Some explicitly identify GLOBE and GUARD as covered exemptions. The administration has neither confirmed nor denied these exemptions but has explicitly reserved discretion to exempt manufacturers participating in other drug pricing initiatives.

Despite concerns raised by commentators and legislators, the administration has released no estimate of the impact on the model-eligible spending base if the 26 manufacturers with voluntary agreements are exempted from GLOBE and GUARD.

In this study, we estimated the 2024 Medicare spending base on drugs meeting the proposed criteria for GLOBE and GUARD and quantified the share from products marketed by manufacturers with voluntary MFN agreements.

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JAMA

The Next Decade of Health Spending—Affordability and Value

September 14, 2026
Health care accounts for nearly one-fifth of the US economy, and national health expenditures are projected to exceed 20% of gross domestic product by 2033.1 After decades of concern about rising expenditures, growing evidence suggests that the US has experienced a sustained slowdown in health spending growth relative to historical trends and earlier projections.2 Whether the US has successfully “bent the cost curve” has become a prominent focus of health policy debate.

Yet spending growth is only one dimension of sustainability and should be considered alongside spending levels and the distribution of financial burden. During the period in which the US bent the cost curve, the disconnect between health care spending, affordability, and population health outcomes has become increasingly pronounced.3,4 For a country that already devotes far more resources to health care than any other,5 even modest growth may have important implications for affordability and access while raising persistent questions about whether spending levels generate sufficient value.

Given the already high level of US health care spending and growing concerns about affordability, policymakers face a fundamental challenge: improving affordability often requires investment, yet additional spending is increasingly difficult to accommodate. Recent increases in health care spending also suggest that the slowdown observed over the past decade may not persist.1 In this context, the critical question for policymakers is not whether but how spending growth over the next decade can be constrained. We argue that 5 interconnected forces will shape not only how much the US spends on health care, but also who bears those costs and whether health gains are achieved in return.
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Health Affairs

US Health Care Financing: Tax, Premium, And Out-Of-Pocket Contributions Among Tax Filers, 2023

September 9, 2026
The United States spends more on health care than any other country, yet its fragmented financing structure masks the full financial burden that individuals bear through taxes, premiums, and out-of-pocket payments. A sizeable number of people contribute to the health care financing of others while they themselves remain uninsured. This cross-sectional study used 2023 Current Population Survey Annual Social and Economic Supplement data to quantify health care contributions among US tax filers, by income quintile, payment type, and sociodemographic characteristics. Although total contributions were higher at each successive income quintile, out-of-pocket spending fell disproportionately on lower-income and sicker people. Uninsured tax filers younger than age sixty-five contributed approximately 64 percent of what their insured counterparts paid, despite lacking coverage. Virtually all tax filers contributed to US health care financing through its public financing streams, yet many remained exposed to significant financial risk or lacked coverage altogether. This reflects the fragmented structure of US health care financing, where financial contributions are not aligned with coverage or protection from medical costs.
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Health Affairs Scholar

Cross-Country Differences in Household Healthcare Spending

September 3, 2026
Health systems face financial pressures as populations age and economic growth slows, with implications for who pays for health care and for what drives expenditure growth.

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JAMA Network Open

H-1B Visa Restrictions and US Primary Care Dependence on International Medical Graduates

August 17, 2026
Primary care in the US faces persistent workforce shortages compounded by concerns about retention, with increasing numbers of physicians exiting the workforce in recent years. Non-US international medical graduates (IMGs) represent a substantial share of the residency pathway in specialties that provide first-contact care and chronic disease management. Most IMGs enter US graduate medical education through J-1 visas, which are specifically designed for clinical training and typically require return to the home country upon completion of training. In contrast, H-1B visas are employment-based and allow physicians to remain in the US for clinical practice, making them an important pathway for workforce retention. Policy changes affecting H-1B visa availability may have important implications for the stability of the training pathway.5 This study quantifies specialty- and state-level reliance on non-US IMGs in primary care training and estimates the extent to which H-1B visa restrictions could disrupt this pathway.
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Health Affairs Forefront

The Trump Administration’s Deals With Pharma: Policy Progress Or Political Theater?

July 30, 2026
President Donald Trump has made lowering prescription drug prices a signature issue during both his administrations. Until recently, however, he had relatively little to show for it. During his first term, Congress did not enact major drug-pricing legislation, and his executive initiatives on drug importation, international reference pricing in Medicare Part B, and rebate reform in Medicare Part D were left unimplemented.

The second Trump administration has pursued a broader, more aggressive “most-favored-nation” (MFN) drug pricing agenda, seeking to peg US prices to international benchmarks and thereby import lower prices paid abroad. Its initiatives include the Global Benchmark for Efficient Drug Pricing (GLOBE) model and the Guarding US Medicare Against Rising Drug Costs (GUARD) model, mandatory MFN reference pricing models for Medicare Parts B and D, respectively; and the GENErating cost Reductions fOr US Medicaid (GENEROUS) model, a voluntary model for Medicaid.

Most public attention, however, has focused on voluntary bilateral agreements with 17 drug companies representing 86 percent of branded drug sales. Announced between September 2025 and April 2026, these agreements include price concessions, commitments to sell drugs through direct-to-consumer channels (such as the administration’s TrumpRx website), and investments in domestic drug development and manufacturing (exhibit 1).

The significance of these deals is disputed. The White House touts them as “the most significant actions ever taken” to lower drug prices. Critics, such as Senator Ron Wyden (D-OR), have called them “a sham that benefits pharmaceutical corporations while offering little to no savings to patients and their families.”
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Sage Journals

Altruism budgets or benevolence constraints? Pro-social behaviours across causes and domains

June 26, 2026
We examine the existence of altruism budgets (AB), which imply fixed monetary allocations to prosocial behaviours (PSB), and benevolence constraints (BC), which refer to wider limits to benevolent behaviour, giving rise to a substitution between PSB's across domains and causes, including volunteering and biological donations. Using longitudinal data from the Netherlands from 2003 to 2019, we exploit two exogenous shocks to charitable behaviour: the introduction of a tax incentive that increased donations to culture and the arts, and a large-scale emergency fundraising campaign targeting Syrian refugees and victims of Typhoon Haiyan. Our results provide no evidence of AB but robust evidence of BC. We find a robust and precisely estimated decline in volunteering of approximately 4.5 hours per month after the emergency aid campaign among donors. This pattern suggests that individuals substitute across different forms of prosocial behaviour, reallocating effort from non-monetary activities such as volunteering toward monetary contributions during periods of heightened charitable demand.
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Frontiers in Transplantation

Best practices along the kidney transplantation clinical journey

April 12, 2026
Background: Kidney transplantation (KTx) practices vary across healthcare systems, yet the operational components of best practice (BP) along the clinical pathway remain incompletely defined. This study aimed to identify key best practice elements across the kidney transplantation journey in four European countries.Methods: A mixed-methods study was conducted across France, Germany, Italy, and Spain. A structured survey (n = 253 respondents, including patients, living donors, nephrologists, transplant surgeons, transplant coordinators, and hospital administrators) assessed clinical practice and patient experience across four domains: CKD management, kidney donation and transplantation, transplant recipient care, and service governance. Semi-structured focus group interviews were performed in each country to contextualise survey findings. Ethics approval was obtained in accordance with national requirements.Results: Key elements for best practices along the KTx clinical journey were identified: (1) development of protocols to standardise the variable monitoring of CKD, to minimize urban-rural differences in clinical practice due to limited resources and follow-up care; (2) enhanced primary care training and targeted resource allocation to diagnose and monitor early-stage CKD; (3) donor coordination and promotion of living donation, addressing gaps in patient awareness and access to care; (4) development of communication protocols on living donation; (5) implementation of targeted patient and donor educational campaigns on living donation; (6) enhanced post-transplant follow-up care by nephrologists; (7) integration of quality-of-life assessments and psychological donor support post-transplantation; (8) increased availability of transplant coordinators to promote equitable resource allocation and the adoption of innovative practices; (9) streamlined governance structures along clinical journey; and (10) equitable funding models with consistent reimbursement policies across patient groups.Conclusions: This study provides a cross-national, mixed-methods framework for strengthening equity, coordination, and quality in kidney transplantation. Addressing variability in monitoring pathways, referral structures, patient-centred outcomes, and workforce capacity may enhance implementation of international transplantation guidelines and improve patient and donor outcomes.
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CHeSS in the News

See all the announcements
May 19, 2025 AcademyHealth

Publication-of-the-Year Award 2025

The Publication-of-the-Year Award recognizes the best and most relevant peer-reviewed, scientific work that the fields of health services research and health policy have produced and published in the prior calendar year.

Publication-of-the-Year Award
Differential Legal Protections for Biologics Vs Small-Molecule Drugs in the U.S.
Olivier J. Wouters, Ph.D.
April 16, 2025 The Economist

How Britain decides which drugs to buy

Since 1999, the National Institute for Health and Care Excellence has weighed costs against benefits to help the NHS decide what it should buy. The institute’s boss, Sam Roberts, calls it a mindful “health-care innovation shopper”. Within a fixed budget, every new drug it buys risks squeezing essentials like GPs or ambulances among existing health-care services.
March 26, 2025 STAT+

Recent pharma-telehealth partnerships feel ‘black boxy,’ and why that’s problematic

In recent months, a new kind of partnership between telehealth companies and pharmaceutical manufacturers has come under scrutiny over concerns that such arrangements could lead to inappropriate prescriptions and poor care. Eli Lilly and Pfizer, along with five telehealth companies accessible through the pharma companies’ websites, have recently received letters from four senators echoing those concerns, asking questions about care, prescription volume, and the flow of data and money between the firms. The lawmakers want to determine whether pharma-telehealth deals may be violating the federal anti-kickback statute. That question has also piqued the interest of three health policy researchers at Brown University.
July 1, 2024 Bulletin of the World Health Organization

Policy Approaches to Health System Performance Assessment

The articles in this issue highlight the importance of regular health systems performance assessment to inform policies that advance progress on health system objectives globally, and offer insights on associated data, methods and applications.
June 4, 2024 Science Business

Global research needs transnational funding

As common problems call for more global cooperation in research, cross-border partnerships struggle to get money from national funding agencies
March 2, 2024 APES

Health Policy Analysis of Portuguese Electoral Programs

Sara Machado Ph.D. uses the HSPA framework to examine the health policy propositions being debated by parties in the 2024 Portuguese legislative elections.
January 29, 2024 STAT

Which country has the best health care? That’s the wrong question

Irene Papanicolas: Every health care model involves people doing their best to balance competing priorities in the face of limited resources. In other words, every system involves tradeoffs.
November 10, 2021 The Guardian

England has highest death rates of older patients in western world, study finds

ICCONIC findings featured in a Guardian article.
November 10, 2021 The Health Foundation

Caring for older patients with complex needs: How does England compare with 11 OECD countries?

Report of ICCONIC research to the Health Foundation.
Brown University School of Public Health
Providence RI 02903 401-863-3375 public_health@brown.edu

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