Between 2013 and 2023, 30-day mortality after admission for ischemic stroke fell by approximately 17 percent on average in OECD countries with available data, despite massive healthcare coverage expansion reforms in Latin America and the Caribbean. Zoila Ponce de León analyzes this gap: formal access to care does not automatically translate into health outcomes.

The essentials

  • The sustainability of effective access depends, according to Ponce de León, on financing and infrastructure specifications carried by parties durably committed to them.
  • Mexico and Peru both expanded their coverage; their divergent institutional trajectories show variations in the consolidation of health gains depending on political changes.
  • Thirty-day mortality after admission for ischemic stroke fell by approximately 17 percent on average in OECD countries with available data between 2013 and 2023 (OECD, Health at a Glance: Latin America and the Caribbean 2026).
  • The fragility of reforms stems from their dependence on the political coalitions that support them: political changes can reduce their scope.
  • Latin American health systems will need to finance chronic disease management as their populations age.

Who is Zoila Ponce de León

Zoila Ponce de León is a political scientist specializing in social policies and health institutions in Latin America. Her work follows the tradition of comparative politics that studies how state capacities, not merely political will, determine the outcomes of social reforms. The Politics of Healthcare Expansion, published in July 2026 by Cambridge University Press, is her first book. It extends a research vein that, since the work of Daron Acemoglu and Simon Johnson on institutions and development, has sought to understand why well-intentioned policies produce such unequal effects across different contexts.

The thesis: what survives political transitions

The central argument of the book can be stated in one sentence: health reforms persist more when parties have programmatic commitment to them and specify their financing and infrastructure needs. Ponce de León does not merely observe that some reforms survive and others do not. She identifies the mechanism.

According to the book, partisan engagement in designing financing and infrastructure promotes feasible and sustainable implementation. These interests become protective shields. Doctors trained to work in the system have a stake in its survival. Administrators who depend on it resist its dismantling. Beneficiaries who use it regularly learn to defend it.

Conversely, a reform based on a temporary political coalition, a party in power, a favorable governor, an emergency budget, remains dependent on the stability of that coalition. Changes in political composition can reduce or transform the reform. Patients it targeted did not have time to develop dependence on the system. Professionals involved work in precarious structures, easily dissolved by the next administration.

Ponce de León distinguishes the increase in formal coverage from effective access sustained by stable financing and sufficient infrastructure. Coverage can expand rapidly. Embedding requires time, resources, and political continuity beyond electoral cycles.

Mexico and Peru: two laboratories, two trajectories

The empirical heart of the book is a close comparison of Chile, Mexico, and Peru across two decades of healthcare reform.

Mexico launched the Seguro Popular in 2003, under President Vicente Fox. The objective was ambitious: to cover the fifty million Mexicans who remained outside the employment-linked insurance system. The program functioned, in part. Millions of families gained formal access to primary care. But Ponce de León presents the Seguro Popular as a reform primarily driven and shaped by technocrats, with limited programmatic involvement from political parties.

Financing relied on federal budget resources and coordination agreements with states. Health professionals worked under precarious contracts. When President López Obrador dissolved it in 2020 to replace it with the Instituto de Salud para el Bienestar (INSABI), the latter experienced infrastructure deficits and operational and monitoring weaknesses. Some health facilities experienced closures or reorganizations.

Chronic patients experienced interruptions in their care.

The Peruvian case differs in form but converges toward a similar finding. Peru developed its coverage expansion progressively, gradually widening access to informal workers in a primary care system. Where formal coverage was accompanied by infrastructure, human resources, and sustainable financing, effective access was strengthened. When Peruvian reform fails to produce effective access, Ponce de León primarily attributes this to partisan disengagement and an insufficiently specified technocratic design.

The comparison is not a plea for a single model. It demonstrates that a reform’s ability to endure depends, according to Ponce de León, on parties’ programmatic commitment and credible provisions for financing and infrastructure.

The book and chronic disease

Ponce de León devotes several chapters to a shift that makes the problem even more acute: the transition from infectious disease epidemiology to chronic disease epidemiology. For decades, Latin American health systems were built to treat acute episodes—an infection, childbirth, trauma. This model, centered on public hospitals and episodic consultation, is poorly adapted to managing chronic diseases: diabetes, hypertension, cardiovascular disease, kidney failure.

Chronic diseases require long-term, regular, coordinated follow-up across multiple levels of care. They also require that patients return, which they do only if they trust the system and have access without major financial or geographic barriers. This is precisely what organizational fragility prevents. A system with unstable human resources, irregular access structures, and non-integrated medical records cannot ensure this follow-up.

According to Ponce de León, the absence of financing and infrastructure specifications compromises effective access and the sustainability of reforms.

This finding resonates with a broader debate on the conditions for health system effectiveness. European data show that spending more in hospitals does not necessarily produce better results: what matters is the system’s configuration, how it coordinates, at what level it intervenes, what continuity it guarantees. Ponce de León’s book applies this logic to Latin America with an institutional precision that few works had achieved until now.

The book’s blind spots

The Politics of Healthcare Expansion is a comparative political science book, and this delimits its field. Ponce de León is interested in public policy formation and its institutional sustainability. She is less interested in what happens inside consultations: the clinical quality of care, access to medicines, the skills actually mobilized. A reader seeking analysis of medical training or pharmaceutical supply chains will need to look elsewhere.

The choice of two cases, Mexico and Peru, is methodologically defensible, but it leaves open questions that the comparison cannot settle. Brazil, with its Unified Health System (SUS), offers a case of much deeper institutional embedding: constitutional since 1988, financed by a dedicated budget line, defended by a coalition of actors that includes unions, health professionals, and social movements. The book does not explicitly explain why Ponce de León does not include Brazil in her main comparison. The Brazilian SUS is precisely the type of institution the author wishes for, with all its contradictions: insufficient financing, persistent regional inequalities, and rampant privatization.

The book is also reticent on the role of private actors. In Latin America, an increasing share of care is provided by the private sector—clinics, complementary insurance, pharmacies. Ponce de León analyzes public systems, but the interactions between public coverage and private supply are left in the background. This is a real blind spot, especially since the rise of private supply can both relieve public systems and weaken their financing by capturing more solvent contributors.

Challenges for Latin American health systems through 2045

Ponce de León’s book closes on the present. But her thesis opens directly onto a trajectory question: over the next twenty years, Latin American populations will age rapidly. Mexico, Brazil, Chile, and Colombia are experiencing demographic aging comparable to that of the 1980s-1990s in Europe, but in a context of more limited resources and administrative capacities.

Demographic aging transforms the structure of health needs. Cardiovascular disease, diabetes, dementia, and cancers—all requiring long and costly follow-up—will weigh increasingly heavily on health spending. A system organized around acute episodes and emergency department visits absorbs this burden poorly. It transforms it into avoidable hospitalizations, late complications, premature deaths.

The issue posed implicitly by Ponce de León’s book is this: what institutional arrangement enables an underfunded public health system to sustainably finance prevention and chronic disease management? Two trajectories emerge, which the author does not explore but which her thesis allows us to articulate.

The first passes through progressive institutional embedding: regularization of primary health personnel, creation of dedicated budget lines for chronic diseases protected from political cycles, development of medical records shared across levels of care. This is the direction some regions of Peru and a few Mexican states have taken experimentally. It is slow, politically difficult, and depends on an administrative will that political transitions regularly call into question.

The second relies on public-private hybrids, contracting private actors within a public framework, community mutual insurance covering informal workers, digital platforms for remote monitoring. This path can move faster and bypass bureaucratic rigidities. But it tends to widen quality differences among beneficiaries depending on their ability to access paid complementary services. The case of cell therapies shows how powerful medical innovations can remain inaccessible if prescription and administration circuits are not built alongside them: the logic applies to any system that delegates care without building the organizations that make it real.

Ponce de León’s book provides a reading framework: the signals to monitor are the sustainability of financing, infrastructure development, and effective access to health services. These signals allow one to assess the implementation of a reform and its vulnerability to political changes.

Reasons to read this book

This book is addressed first to those working on health policies in contexts of limited resources—researchers, decision-makers at multilateral organizations, program managers in Latin American health ministries. It offers them a rigorous analytical framework and empirically dense case studies.

But it also interests anyone following comparative social policies more broadly. Ponce de León’s thesis, that a reform’s durability depends on the organizations it creates, not merely on the rights it proclaims, holds well beyond health. It applies to education, social protection, and pensions. The book’s strength is to demonstrate this with an institutional precision often lacking in more general work on public policy resilience.

It arrives at a moment when Latin America must decide whether to consolidate coverage extensions of the past twenty years or let them erode. Ponce de León’s diagnosis stresses that some reforms already show signs of erosion. But her severity is analytical, never fatalistic. What a reform has undone can be rebuilt, provided we understand why it gave way.

Bibliographic information Title: The Politics of Healthcare Expansion Author: Zoila Ponce de León Publisher: Cambridge University Press Publication date: July 8, 2026

Sources

  1. Zoila Ponce de León, The Politics of Healthcare Expansion, Cambridge University Press, 2026. https://www.cambridge.org/core/books/politics-of-healthcare-expansion/A945D1F2A216BBD120B5467C33C8E676
  2. OECD, Health at a Glance: Latin America and the Caribbean 2026, Organisation for Economic Co-operation and Development.