Training field days increase awareness and adoption of technology, irrespective of how the demonstrators are selected

A simple training increased adoption of an agricultural technology by over 90%, with persistent improvements in agricultural production and land use

The Colombian government used roads as a token of exchange for legislative support, sparking debates about the proper handling of public resources

The use of double-fortified salt in school lunches reduced anaemia by 22–27% among schoolchildren aged 7 and 8 in Bihar, India

A one-off demonetisation led to a shift to electronic payments, which in turn increased tax compliance

Action plans are a cost-effective way to improve job search outcomes for unemployed youth

The adoption of sales registration machines in Ethiopia substantially increased tax revenue, but by less than expected due to taxpayer responses

Comprehensive corporate income tax audits improve future tax compliance, but narrow scope audits can actually reduce compliance

Conflict-driven displacement can trigger structural transformation, but can also cause long-lasting social and psychological trauma