Measuring trends over time – whether at the national or international level - remains one of the most critical challenges facing corruption research. Due to cost and logistical constraints, governance indicators are often either limited in their geographic or time-period coverage, which makes it difficult to track change. Current corruption indicators gather the various stakeholders’ views of levels of corruption in a given country or assess the state of the anti-corruption legal and institutional frameworks in place. Tracking international trends would involve either repeating worldwide surveys on a regular basis using aggregated indicators or generating comparable country level data, with major resource implications to ensure global coverage.