AI-Powered IMF Research Rewrites History of Financial Controls and Liberalization

A new IMF study using AI and 70 years of archival data shows that governments have relied on a much wider range of financial restrictions than previously understood to manage crises, currencies, and capital flows. The research challenges the idea of steady financial liberalization, revealing repeated waves of tightening during periods of global instability such as the collapse of Bretton Woods and major debt crises.

A major new study by researchers at the International Monetary Fund (IMF) and Columbia University is challenging long-held assumptions about global financial liberalization. The paper, authored by Katharina Bergant, Andrés Fernández, Ken Teoh, and Martín Uribe, uses artificial intelligence to trace how governments around the world managed cross-border financial flows over the past seven decades.

Drawing on the IMF's vast archive of Annual Reports on Exchange Arrangements and Exchange Restrictions (AREAER), the researchers created a database of more than 40,000 policy changes across 195 countries since 1950. Their findings suggest that the world's financial system has not steadily moved toward openness, as commonly believed. Instead, governments repeatedly tightened and loosened restrictions in response to crises, political pressures, and economic instability.

Governments Used Far More Than Traditional Capital Controls

The study argues that earlier research focused too narrowly on capital-account restrictions, missing a much broader set of tools governments used to regulate international finance. According to the researchers, capital-account measures represented only about one-fifth of all restrictions historically imposed.

Countries also relied heavily on foreign exchange regulations, export surrender rules, import-payment restrictions, controls on resident and non-resident accounts, and financial-sector regulations. These measures were often used together to manage currency pressures, stabilize domestic markets, and protect foreign reserves.

The findings show that governments treated financial regulation as a flexible policy toolkit rather than a single category of "capital controls." During periods of instability, policymakers combined multiple restrictions across different sectors to manage economic risks.

The Bretton Woods Collapse Triggered a Wave of Restrictions

One of the study's most important findings concerns the collapse of the Bretton Woods monetary system in the 1970s. Rather than leading immediately to financial openness, the end of fixed exchange rates triggered a sharp tightening of restrictions in many countries.

Governments imposed stricter foreign exchange controls, tightened financial-sector regulations, and increased export and payment restrictions to cope with exchange-rate volatility and balance-of-payments pressures. The researchers describe this period as one of the largest waves of financial tightening in modern history.

Liberalization accelerated only from the mid-1980s onward as globalization and deregulation gained momentum. Even then, the process was uneven. High-income countries opened their financial systems much faster than developing economies, many of which continued relying on restrictions to manage external shocks and financial risks.

Crises Still Push Governments Toward Restrictions

The study also reveals how governments use restrictions during crises. Financial controls were rarely introduced one at a time. More than three-quarters of all measures occurred within a month of another policy action, showing that governments typically launched coordinated packages of restrictions rather than isolated interventions.

During currency and sovereign debt crises, countries more than doubled their use of restrictions, especially measures aimed at stopping capital flight and stabilizing exchange rates. Outflow controls became particularly common during periods of financial stress.

The researchers also found strong links between political conditions and the use of restrictions. Countries with weaker institutions, higher corruption, political tensions, or economic instability were more likely to rely on these measures. Election years also saw increased use of cross-border restrictions, suggesting political considerations often shaped financial policy decisions.

Artificial Intelligence Opens a New Window Into Economic History

A key innovation of the study is its use of artificial intelligence to analyze decades of IMF archives. Researchers trained large language models to identify whether measures represented tightening or loosening, whether they targeted inflows or outflows, and what type of restriction they imposed.

The AI system achieved accuracy levels close to those of human experts while allowing researchers to process millions of words of historical material quickly and consistently. The approach helped uncover patterns that earlier datasets could not capture.

The paper concludes that global financial history is far more cyclical and interventionist than many economists assumed. Rather than permanently embracing open capital markets, governments have repeatedly adjusted the balance between financial openness and economic control in response to changing global conditions.

At a time when geopolitical tensions, economic fragmentation, and financial instability are once again shaping international markets, the study suggests that restrictions on cross-border financial flows may remain an important part of government policy for years to come.