sentences:  This index evaluates the risk of corruption in countries' military sector.The World Bank collects a range of data on corruption, including survey responses from over 100,000 firms worldwide and a set of indicators of governance and institutional quality.Moreover, one of the six dimensions of governance measured by the Worldwide Governance Indicators is Control of Corruption, which is defined as "the extent to which power is exercised for private gain, including both petty and grand forms of corruption, as well as 'capture' of the state by elites and private interests."