Trade liberalization and social determinants of health: A state of the literature review

Defining equity, its determinants, and the foundations of equity science

Advancing equity as a priority is increasingly declared in response to decades of evidence showing the association between poorer health outcomes and the unfair distribution of resources, power, and wealth across all levels of society. Quandries present, however, through incongruence, vagueness and disparate interpretations of the meaning of equity dilute and fragment efforts across research, policy and practice. Progress on reducing health inequities is, in this context, unsurprisingly irresolute. In this article, we make a case for equity science that reimagines the ways in which we (as researchers, as systems leaders, as teachers and mentors, and as citizens in society) engage in this work. We offer a definition of equity, its determinants, and the paradigmatic foundations of equity science, including the assumptions, values, and processes., and methods of this science. We argue for an equity science that can more meaningfully promote coherent alignment between intention, knowledge and action within and beyond the health sciences to spark a more equitable future.

What Are Healthy Societies? A Thematic Analysis of Relevant Conceptual Frameworks

BACKGROUND

While support for the idea of fostering healthy societies is longstanding, there is a gap in the literature on what they are, how to beget them, and how experience might inform future efforts. This paper explores developments since Alma Ata (1978) to understand how a range of related concepts and fields inform approaches to healthy societies and to develop a model to help conceptualize future research and policy initiatives.

METHODS

Drawing on 68 purposively selected documents, including political declarations, commission and agency reports, peer-reviewed papers and guidance notes, we undertook qualitative thematic analysis. Three independent researchers compiled and categorised themes describing the domains of a potential healthy societies approach.

RESULTS

The literature provides numerous frameworks. Some of these frameworks promote alternative endpoints to development, eschewing short-term economic growth in favour of health, equity, well-being and sustainability. They also identify values, such as gender equality, collaboration, human rights and empowerment that provide the pathways to, or underpin, such endpoints. We categorize the literature into four "components": people; places; products; and planet. People refers to social positions, interactions and networks creating well-being. Places are physical environments-built and natural-and the interests and policies shaping them. Products are commodities and commercial practices impacting population health. Planet places human health in the context of the 'Anthropocene.' These components interact in complex ways across global, regional, country and community levels as outlined in our heuristic.

CONCLUSION

The literature offers little critical reflection on why greater progress has not been made, or on the need to organise and resist the prevailing systems which perpetuate ill-health.

How to Build Healthy Societies: A Thematic Analysis of Relevant Conceptual Frameworks

BACKGROUND

As the Sustainable Development Goals deadline of 2030 draws near, greater attention is being given to health beyond the health sector, in other words, to the creation of healthy societies. However, action and reform in this area has not kept pace, in part due to a focus on narrower interventions and the lack of upstream action on health inequity. With an aim to guide action and political engagement for reform, we conducted a thematic analysis of concepts seeking to arrive at healthy societies.

METHODS

This paper drew on a qualitative thematic analysis of a purposive sample of 68 documents including political declarations, reports, peer reviewed literature and guidance published since 1974. Three independent reviewers extracted data to identify, discuss and critique public policy levers and 'enablers' of healthy societies, the "how."

RESULTS

The first lever concerned regulatory and fiscal measures. The second was intersectoral action. The final lever a shift in the global consensus around what signifies societal transformation and outcomes. The three enablers covered political leadership and accountability, popular mobilization and the generation and use of knowledge.

CONCLUSION

Documents focused largely on technical rather than political solutions. Even as the importance of political leadership was recognized, analysis of power was limited. Rights-based approaches were generally neglected as was assessing what worked or did not work to pull the levers or invest in the enablers. Frameworks typically failed to acknowledge or challenge prevailing ideologies, and did not seek to identify ways to hold or governments or corporations accountable for failures. Finally, ideas and approaches seem to recur again over the decades, without adding further nuance or analysis. This suggests a need for more upstream, critical and radical approaches to achieve healthy societies.

Estimating the unintended impact of the North American free trade agreement on U.S. public health

The North American Free Trade Agreement (NAFTA) was introduced in 1994 between Canada, Mexico, and the United States to encourage trilateral trade. In 2008, an unrestricted reciprocal sugar trade agreement, was implemented between Mexico and the United States as part of NAFTA, which led to a significant decrease in the United States' sugar price. However, critics argue that free trade agreements that reduce trade barriers on products such as sugar threaten public health. This study uses the synthetic control method to investigate the causal impact of the unrestricted sugar trade agreement on sugar consumption and diabetes prevalence in the United States. First, we show that sugar consumption in the United States increased by an average of 16% annually after the agreement was signed, corresponding to 5240g per capita. Second, we show that the crude prevalence of diabetes increased by an average of 1% annually in the United States after the agreement was signed, with an increase of 1% and 2% for men and women, respectively. This unintended consequence of NAFTA has had an estimated economic cost of $324.37 million annually.

A review of international trade and investment agreements and nutrition policy space in the Pacific

Small Island Developing States (SIDS) in the Pacific are heavily reliant on imported foods which are often nutritionally deficient, and typically high in salt, fat, and sugar. To curb nutrition-related non-communicable diseases, nutrition policies are needed to create food environments that promote healthy diets. However, international trade and investment agreements (TIAs) may interfere with the policy space for SIDS to regulate their food environments by requiring member states to meet trade obligations that could conflict with their nutrition policy goals. In this review, we identify real examples of where TIAs have been responsible for changes in Pacific SIDS' nutrition policies alongside the potential for further constraints on healthy nutrition policies from Pacific Island participation in TIAs. In addition, we note the effects of regulatory chill from TIA obligations in Pacific SIDS, whereby healthy nutrition policies are not considered, developed, or implemented due to the threat of trade disputes or the complexity of TIA procedural requirements. Existing literature indicates that TIAs have shaped nutrition policies to fit within the global trade paradigm despite SIDS' nutrition policy imperatives. More can be done locally, regionally, and internationally to increase the importance of nutrition in the trade agenda, leverage regional institutions to champion nutrition regulation and support SIDS in navigating the trade and nutrition policy environment.

The Impact of Foreign Trade on Health Inequality in China: Evidence From China Family Panel Studies (CFPS)

Objectives: To assess the health inequality caused by foreign trade in China using individual self-rated health data from China Family Panel Studies (CFPS).

Methods: The GMM model was used to explore the direct and indirect effects of foreign trade on health level, and the concentration index method was then used to decompose the contribution of foreign trade to health inequality.

Results: The direct effect of foreign trade does not contribute to the current health inequality, although the indirect effects of trade contribute to health inequality through inequalities in income and healthcare utilization. The indirect pollution effect of trade does not cause health inequality. Subsequently, the direct effect of trade aggravates the dynamic expansion trend of health inequality, whereas the indirect effects of trade alleviate the increasing trend of health inequality.

Conclusion: Although foreign trade improves the overall health level in China, it contributes to health inequality. Optimizing product structure of trade, adjusting income distribution, and enhancing medical securities for low-income groups are necessary to alleviate the health inequality caused by foreign trade.

Impacts of the Internet on Health Inequality and Healthcare Access: A Cross-Country Study

Access to information and resources through the Internet has become an increasingly critical aspect of contemporary life. Based on the WHO Health Equity Assessment Toolkit (HEAT) and cross-country panel data, this paper investigates the effect of Internet access on health inequality across different income groups. The results indicate that access to the Internet significantly improves the average health condition and alleviates health inequality. In addition, employing cross-country data from the Global Burden of Disease (GBD) database, this paper further examines the social and economic determinants of access to healthcare. Specifically, it is found that Internet access significantly facilitates healthcare access and mitigates the negative impact of income inequality on healthcare access. Considered together, these findings shed light on the importance of the Internet in reducing health inequality and improving healthcare access.

Does free-market capitalism drive unequal access to health? An empirical analysis, 1970-2015

Many scholars, particularly in public health, argue that neoliberal capitalist economic forces adversely affect communities by increasing inequalities, ultimately affecting health. Apparently, corporate capitalism affects health and communitarian concerns because governments place corporate profits over the publićs interests. Using unique data collected by the Varieties of Democracy (VDEM) project that capture the degree of access of the poorest segments of society to health services comparable with those available to the richest segments, this study finds that an index of economic freedom robustly reduces inequality of access to health. We argue that these results obtain because greater exposure to global markets increases the premium on the productivity of labour, increasing incentives for political elites to invest in productivity-enhancing public goods. Our results are robust to a number of alternative models and data, and robust to instrumental variables analyses addressing potential endogeneity. Rather than free-market capitalism increasing health-related neglect of society, our data suggest that free-market capitalist conditions promote equitable access to health. This is good news for governments wishing to grow their economies, reform broken health systems for gaining advantages in a competitive global economy, and serve communitarian interests, such as shared good health.

Health Inequality as a Large-Scale Outcome of Complex Social Systems: Lessons for Action on the Sustainable Development Goals

Action on the Sustainable Development Goals (SDGs) needs to become real and impactful, taking a "whole systems" perspective on levers for systems change. This article reviews what we have learned over the past century about the large-scale outcome of health inequality, and what we know about the behaviour of complex social systems. This combined knowledge provides lessons on the nature of inequality and what effective action on our big goals, like the SDGs, might look like. It argues that economic theories and positivist social theories which have dominated the last 150 years have largely excluded the nature of human connections to each other, and the environment. This exclusion of intimacy has legitimatised arguments that only value-free economic processes matter for macro human systems, and only abstract measurement constitutes valuable social science. Theories of complex systems provide an alternative perspective. One where health inequality is viewed as emergent, and causes are systemic and compounding. Action therefore needs to be intensely local, with power relationships key to transformation. This requires conscious and difficult intervention on the intolerable accumulation of resources; improved reciprocity between social groups; and reversal of system flows, which at present ebb away from the local and those already disadvantaged.

Relieving the tension between national health equity strategies and global health equity

Globally, numerous national strategies have taken aim at reducing health inequities. An ever-present tension characterizing these strategies, however, is their lack of attention to the global political economy. This commentary argues that national policies which target only domestic factors (without engaging with the global political economy) will be limited, both, in their ability to address national levels of health equity and the larger global health inequity problem. Meaningful proposals to reduce health inequities have been made that take into account a global political economy perspective. National health equity strategies could provide the lacking momentum to advance such proposals, but will require united and sustained advocacy by global health and health equity scholars. Ultimately, relieving the tension between national health equity commitments and global health equity concerns could be one of the new approaches needed to improve health equity worldwide.

International trade and the neoliberal diet in Central America and the Dominican Republic: Bringing social inequality to the center of analysis

Scholarship on international trade and health analyzes the effects of trade and investment policies on population exposure to non-nutritious foods. These policies are linked to the nutrition transition, or the dietary shift towards meat and processed foods associated with rising overweight and obesity rates in low- and middle-income countries. We argue for expanding the trade and health literature's focus on population exposure through the concept of the neoliberal diet, which centers subnational social inequality as both an outcome of neoliberal agri-food trade policies and a determinant of dietary change. We develop this perspective through a regional analysis of non-nutritious food availability following the implementation of the Dominican Republic-Central America Free Trade Agreement (CAFTA-DR), together with an extended case study, from the late 1990s to the present, of household expenditure and food price changes in the Dominican Republic, the region's largest food importer. Our analysis demonstrates that low-income consumers face increasing household food expenditures in a context of overall food price inflation, in addition to relatively higher price increases for healthy versus ultraprocessed foods. Neoliberal policies not only contribute to restructuring the availability and pricing of healthy food for low-income consumers, but they also exacerbate social inequality in the food system through corporate-controlled supply chains and farmer displacement. Our findings support policy proposals for socially distributive forms of healthy food production to stem the negative effects of the nutrition transition.

Globalization and health equity: The impact of structural adjustment programs on developing countries

Among the many drivers of health inequities, this article focuses on important, yet insufficiently understood, international-level determinants: economic globalization and the organizations that spread market-oriented policies to the developing world. One such organization is the International Monetary Fund (IMF), which provides financial assistance to countries in economic trouble in exchange for policy reforms. Through its 'structural adjustment programs,' countries around the world have liberalized and deregulated their economies. We examine how policy reforms prescribed in structural adjustment programs explain variation in health equity between nations-approximated by health system access and neonatal mortality. Our empirical analysis uses an original dataset of IMF-mandated policy reforms for a panel of up to 137 developing countries between 1980 and 2014. We employ regression analysis to evaluate the relationship between these reforms and health equity, taking into account the non-random selection and design of IMF programs. We find that structural adjustment reforms lower health system access and increase neonatal mortality. Additional analyses show that labor market reforms drive these deleterious effects. Overall, our evidence suggests that structural adjustment programs endanger the attainment of Sustainable Development Goals in developing countries.

Agricultural trade policies and child nutrition in low- and middle-income countries: a cross-national analysis

BACKGROUND

There has been growing interest in understanding the role of agricultural trade policies in diet and nutrition. This cross-country study examines associations between government policies on agricultural trade prices and child nutrition outcomes, particularly undernutrition.

METHODS

This study links panel data on government distortions to agricultural incentives to data from 212,258 children aged 6 to 35 months participating in Demographic and Health Surveys from 22 countries between 1991 and 2010. Country fixed-effects regression models were used to examine the association between within-country changes in nominal rates of assistance to tradable agriculture (government price distortions as a percentage of original prices) and child nutritional outcomes (height-for-age, weight-for-age, and weight-for-height Z-scores) while controlling for a range of time-varying country covariates.

RESULTS

Five-year average nominal rates of assistance to tradable agriculture ranged from - 72.0 to 45.5% with a mean of - 5.0% and standard deviation of 18.9 percentage points. A 10-percentage point increase in five-year average rates of assistance to tradable agriculture was associated with improved height-for-age (0.02, 95% CI: 0.00-0.05) and weight-for-age (0.05, 95% CI: 0.02-0.09) Z-scores. Improvements in nutritional status were greatest among children who had at least one parent earning wages in agriculture, and effects decreased as a country's proportion of tradable agriculture increased, particularly for weight-for-age Z-scores.

CONCLUSIONS

Government assistance to tradable agriculture, such as through reduced taxation, was associated with small but significant improvements in child nutritional status, especially for children with a parent earning wages in agriculture when the share of tradable agriculture was not high.

Analyzing the impacts of global trade and investment on non-communicable diseases and risk factors: a critical review of methodological approaches used in quantitative analyses

Background

A key mechanism through which globalization has impacted health is the liberalization of trade and investment, yet relatively few studies to date have used quantitative methods to investigate the impacts of global trade and investment policies on non-communicable diseases and risk factors. Recent reviews of this literature have found heterogeneity in results and a range of quality across studies, which may be in part attributable to a lack of conceptual clarity and methodological inconsistencies.

Methods

This study is a critical review of methodological approaches used in the quantitative literature on global trade and investment and diet, tobacco, alcohol, and related health outcomes, with the objective of developing recommendations and providing resources to guide future robust, policy relevant research. A review of reviews, expert review, and reference tracing were employed to identify relevant studies, which were evaluated using a novel quality assessment tool designed for this research.

Results

Eight review articles and 34 quantitative studies were identified for inclusion. Important ways to improve this literature were identified and discussed: clearly defining exposures of interest and not conflating trade and investment; exploring mechanisms of broader relationships; increasing the use of individual-level data; ensuring consensus and consistency in key confounding variables; utilizing more sector-specific versus economy-wide trade and investment indicators; testing and adequately adjusting for autocorrelation and endogeneity when using longitudinal data; and presenting results from alternative statistical models and sensitivity analyses. To guide the development of future analyses, recommendations for international data sources for selected trade and investment indicators, as well as key gaps in the literature, are presented.

Conclusion

More methodologically rigorous and consistent approaches in future quantitative studies on the impacts of global trade and investment policies on non-communicable diseases and risk factors can help to resolve inconsistencies of existing research and generate useful information to guide policy decisions.

Electronic supplementary material

The online version of this article (10.1186/s12992-018-0371-8) contains supplementary material, which is available to authorized users.

Does trade liberalization reduce child mortality in low- and middle-income countries? A synthetic control analysis of 36 policy experiments, 1963-2005

Scholars have long argued that trade liberalization leads to lower rates of child mortality in developing countries. Yet current scholarship precludes definitive conclusions about the magnitude and direction of this relationship. Here I analyze the impact of trade liberalization on child mortality in 36 low- and middle-income countries, 1963–2005, using the synthetic control method. I test the hypothesis that trade liberalization leads to lower rates of child mortality, examine whether this association varies between countries and over time, and explore the potentially modifying role of democratic politics, historical context, and geographic location on the magnitude and direction of this relationship. My analysis shows that, on average, trade liberalization had no impact on child mortality in low- and middle-income countries between 1963 and 2005 (Average effect (AE): −0.15%; 95% CI: −2.04%–2.18%). Yet the scale, direction and statistical significance of this association varied markedly, ranging from a ∼20% reduction in child mortality in Uruguay to a ∼20% increase in the Philippines compared with synthetic controls. Trade liberalization was also followed by the largest declines in child mortality in democracies (AE 10-years post reform (AE₁₀): −3.28%), in Latin America (AE₁₀: −4.15%) and in the 1970s (AE₁₀: −6.85%). My findings show that trade liberalization can create an opportunity for reducing rates of child mortality, but its effects cannot be guaranteed. Inclusive and pro-growth contextual factors appear to influence whether trade liberalization actually yields beneficial consequences in developing societies.

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Impact of trade liberalization on child mortality is currently unclear.

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Analysis of this relationship using synthetic control method.

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There is no universal association between trade liberalization and child mortality.

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Impact of trade liberalization and child mortality varies substantially.

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Reductions in child mortality greatest in democracies, Latin America, and pre-1990.