Cracking down on corruption would reap big economic rewards for governments around the world, according to new analysis by the International Monetary Fund (IMF). In a chapter published Thursday as part of the IMF's April 2019 Fiscal Monitor report, researchers found reducing corruption across all countries would increase total tax revenues by $1 trillion, or roughly 1.25 percent of global GDP (gross domestic product). "The gains would be greater considering that lower corruption would raise economic growth, further boosting revenues," the report added. Among advanced economies, countries with the lowest levels of corruption collected nearly 5 percent of GDP more in tax revenues on average than countries with the highest levels of corruption, the IMF found. For a country the size of the U.K., for example, that math could translate into hundreds of millions of dollars in additional government incomes per year.

The IMF defines corruption as "the abuse of public office for private gain" which can transpire in various ways like payments of bribes, embezzlement, nepotism and conflicts of interest. In the report, the Washington-based fund did not rank the most corrupt countries but described corruption as a "global problem demanding greater international cooperation to tackle it." Measuring the economic costs of corruption is tough since it can occur at various levels of government, from tax collection to the negotiation of contracts between private companies and the public sector. The IMF, along with other international organizations like the World Bank and the Organization for Economic Cooperation and Development (OECD), have prioritized studying global corruption and giving policy recommendations for curbing behavior like bribery and money laundering. A 2018 survey by the OECD found 42 percent of state-owned enterprises reported corrupt acts or other irregular practices in their company during the past three years. High-profile probes of organizations like Petrobras in Brazil or 1MDB in Malaysia have highlighted the widespread nature of corruption in recent years.