Introduction
For most emerging market governments, decisions about how to manage the national currency are among the most politically consequential choices a leader can make. A weaker currency tends to favor exporters and import-competing manufacturers but raises the cost of imported goods and squeezes household purchasing power. A stronger currency does the opposite. Because exchange rates touch nearly every economic actor in a country, they generate intense and often contradictory political pressures. Yet for decades, the dominant approach to studying currency management treated these choices as fundamentally technocratic — questions of macroeconomic optimization to be answered by central bankers and finance ministry economists. That approach has been challenged by a substantial body of political-economy research that takes seriously the distributional politics, institutional constraints, and external pressures that actually shape currency policy in the developing world.
This review surveys that literature. The question driving the field is deceptively simple: why do emerging market governments make the currency choices they do, and what explains the variation we observe across countries and over time? The puzzle is sharpened by the fact that economic theory often predicts what an "optimal" currency policy would look like for a given country, yet actual policy frequently deviates from those predictions — sometimes dramatically. China has spent two decades resisting upward pressure on the renminbi despite mounting economic costs and intense diplomatic friction with the United States. Argentina has repeatedly defended overvalued pegs that crashed in spectacular fashion (The Economist, 2023). Turkey, Brazil, and South Africa have lived through cycles of capital surge and sudden stop that no domestic policy framework seems able to fully insulate against. These are not stories of pure economics. They are stories of who wins, who loses, and which coalitions can durably impose their preferences on monetary authorities.
Currency management matters not just for emerging market citizens but for the global economy. Roughly $7.5 trillion changes hands every day in foreign exchange markets, and emerging market currencies account for a growing share of that turnover. The choices governments make — whether to peg, float, intervene, impose capital controls, or accumulate reserves — ripple outward through trade balances, capital flows, and the transmission of monetary policy from advanced economies to the rest of the world. Understanding what drives these choices is therefore a first-order question for international political economy.
This review proceeds in three parts. The first section traces the evolution of the field from the macroeconomic "trilemma" framework to a more politically grounded view of exchange rate choice. The second section examines the literature on capital controls and the recent rethinking that has followed the global financial crisis. The third section surveys the smaller but rapidly growing body of work on the distributional politics of currency management — who wins, who loses, and how interest groups shape policy outcomes. The conclusion identifies what the field has learned, where disagreements remain, and what kinds of evidence would be needed to advance the conversation.
Scholarly Context
The Trilemma and Its Discontents
The starting point for almost any discussion of currency management in emerging markets is the policy trilemma, sometimes called the impossible trinity. The trilemma holds that a country cannot simultaneously pursue three goals — a fixed exchange rate, free capital mobility, and an independent monetary policy. It must give up one. Aizenman, Chinn, and Ito (2010) provide what has become the standard empirical operationalization of the trilemma, constructing indices that measure each country's position along the three dimensions and tracking how those positions have evolved over time. Their analysis covering more than 170 countries from the 1970s onward shows that emerging markets have generally moved toward intermediate positions — neither pure floats nor hard pegs, with substantial but incomplete capital account openness — rather than the corner solutions that an earlier generation of economists predicted.
This gradual convergence on the middle has been described by Calvo and Reinhart (2002) as a "fear of floating." In their landmark study published in the Quarterly Journal of Economics, Calvo and Reinhart documented that countries which formally classify their exchange rate regimes as floating in fact intervene heavily to limit currency volatility. The fear, they argue, is rooted in the structural vulnerabilities of emerging economies: heavy foreign-currency-denominated debt makes large depreciations devastating for corporate and sovereign balance sheets, low credibility makes inflation pass-through unusually rapid, and shallow domestic financial markets amplify the real effects of currency swings. The implication is that the menu of feasible currency regimes is much narrower in practice than it appears in textbook discussions.
A more radical critique of the trilemma framework has come from Hélène Rey, whose 2013 Jackson Hole paper argued that the trilemma is in fact a "dilemma." Rey's claim is that the global financial cycle — driven primarily by U.S. monetary policy and global risk appetite — transmits financial conditions to emerging markets regardless of their exchange rate regime. Even floating exchange rates, on this account, do not insulate countries from external monetary shocks. The only true protection comes from active management of the capital account. Rey's argument has been controversial but enormously influential, and a substantial subsequent literature has tried to test whether floating regimes do or do not provide meaningful insulation (Klein & Shambaugh, 2015).
Capital Controls and the Post-Crisis Rethink
A closely related strand of the literature focuses on capital controls — the various tools governments use to restrict cross-border financial flows. For most of the 1990s and early 2000s, the dominant view among international financial institutions was that capital account liberalization was both desirable and inevitable. The 1997-98 Asian financial crisis began to shake that consensus, but it was the global financial crisis of 2008 that produced the most decisive shift. Even the IMF, long a champion of open capital accounts, acknowledged in its 2012 institutional view that capital controls could be a legitimate part of the policy toolkit under certain conditions.
Dani Rodrik has been one of the most consistent critics of the older orthodoxy, arguing that the case for unrestricted capital mobility was always weaker than the case for free trade in goods, and that emerging markets in particular have legitimate reasons to manage capital flows (Rodrik, 2017). The crisis vindicated this position. Total cross-border capital flows to emerging markets are highly volatile, surging when global conditions are favorable and reversing abruptly when they are not (Forbes & Warnock, 2012). These reversals — sudden stops, in the language of the literature — are associated with deep recessions, banking crises, and political instability.
The IMF's own research has converged on a similar position. The Fund now distinguishes between capital flow management measures that are appropriate as part of a broader macroprudential toolkit and those that are deployed as substitutes for needed macroeconomic adjustment. This shift represents a significant departure from earlier orthodoxy, though the operational implications remain contested.
The Distributional Politics of Currency Choice
The strands of the literature surveyed so far operate primarily at the level of macroeconomic outcomes. A separate body of work — smaller, more recent, and more rooted in political science than economics — asks who actually benefits and loses from particular currency policies, and how these distributional stakes shape political coalitions. Jeffry Frieden's Currency Politics (2015) is the most ambitious statement of this approach. Frieden argues that exchange rate policy preferences are predictable from sectoral characteristics: tradable-goods producers prefer weaker and more stable currencies, while non-tradables sectors and consumers of imports prefer stronger ones. The political battle over currency policy is thus a battle between coalitions whose membership can be read off from the structure of the economy.
David Steinberg's Demanding Devaluation (2015) builds on this framework but pushes the argument further. Steinberg asks why some developing countries persistently maintain undervalued currencies (China being the canonical example) while others maintain overvalued currencies that periodically collapse (Argentina, Mexico in the 1990s). His answer combines sectoral interests with political institutions: undervaluation requires both a powerful manufacturing lobby and a state with sufficient autonomy from labor and consumer pressures to suppress real wages over extended periods. Where either condition is absent, overvaluation is the more politically sustainable equilibrium even though it is economically destructive in the long run.
The Steinberg framework is powerful, and his case studies of China, Argentina, South Korea, Mexico, and Iran are among the most detailed empirical accounts of currency politics in the literature. The argument has the additional virtue of explaining variation that macroeconomic frameworks struggle with. The trilemma can tell us what tradeoffs a country faces; it cannot tell us why two countries facing similar tradeoffs make different choices.
Recent work has extended this distributional approach in several directions. Scholars have examined how regime type affects currency vulnerability, with some arguing that authoritarian regimes are more prone to currency crises because they lack the institutional checks that constrain leaders from running unsustainable policies. Others have looked at the role of financial sector development, central bank independence, and integration with the dollar system in shaping the menu of feasible currency choices.
Conclusion
Several findings emerge consistently across the literature surveyed here. First, the trilemma remains a useful organizing framework, but emerging markets in practice operate in a more constrained space than the framework's pure tradeoffs suggest. Fear of floating is real, and the global financial cycle compresses the space for genuinely autonomous monetary policy under any regime. Second, capital controls have been substantially rehabilitated as a policy tool, and the post-2008 consensus is more permissive than the orthodoxy of the 1990s. Third, distributional politics matters — perhaps more than macroeconomic optimization — in explaining why countries make the currency choices they do.
What remains contested? The most fundamental debate is whether the global financial cycle has truly displaced the trilemma. Rey's argument is powerful, but a substantial body of empirical work continues to find that exchange rate flexibility does provide meaningful, if incomplete, insulation. The disagreement is partly about how to measure monetary autonomy and partly about how to characterize the magnitude of the effects involved.
A second open question concerns the durability of the post-2008 consensus on capital controls. The institutional view at the IMF has shifted, but actual practice in emerging markets remains highly variable, and the political economy of why some countries deploy controls effectively while others do not is incompletely understood.
Third, the distributional politics literature has made enormous strides in explaining cross-country variation, but it has not yet fully integrated with the macroeconomic literature on currency crises and capital flow management. A frame that combines sectoral coalitions with the external constraints emphasized by Calvo and Reinhart, Aizenman et al., and Rey would represent a meaningful advance.
What kinds of evidence would help? Better data on actual policy implementation — as opposed to formal regime classifications — would address some of the measurement problems that plague the field. More detailed sectoral data linked to currency policy outcomes would allow sharper tests of distributional theories. And case studies of countries that have successfully navigated periods of intense external pressure (Brazil's experience with capital controls in the early 2010s, India's gradual liberalization, Vietnam's managed peg) could illuminate the political conditions under which different policy mixes are sustainable.
The field has moved a long way from purely technocratic accounts of exchange rate policy. It still has work to do in integrating its various strands into a fully unified picture. The politics of currency management in emerging markets is, in the end, a politics of constrained choice.
References
Aizenman, J., Chinn, M. D., & Ito, H. (2010). The emerging global financial architecture: Tracing and evaluating new patterns of the trilemma configuration. Journal of International Money and Finance, 29(4), 615–641.
Calvo, G. A., & Reinhart, C. M. (2002). Fear of floating. Quarterly Journal of Economics, 117(2), 379–408.
Forbes, K. J., & Warnock, F. E. (2012). Capital flow waves: Surges, stops, flight, and retrenchment. Journal of International Economics, 88(2), 235–251.
Frieden, J. A. (2015). Currency Politics: The Political Economy of Exchange Rate Policy. Princeton University Press.
Klein, M. W., & Shambaugh, J. C. (2015). Rounding the corners of the policy trilemma: Sources of monetary policy autonomy. American Economic Journal: Macroeconomics, 7(4), 33–66.
Rey, H. (2013). Dilemma not trilemma: The global financial cycle and monetary policy independence. Paper presented at the Jackson Hole Economic Policy Symposium, Federal Reserve Bank of Kansas City.
Rodrik, D. (2017, May 11). The capital-flows contradiction. Project Syndicate.
Steinberg, D. A. (2015). Demanding Devaluation: Exchange Rate Politics in the Developing World. Cornell University Press.
The Economist. (2023, August 19). Argentina's currency crisis enters a new phase.