This paper first develops a simple model to show that incentives for match-rigging in professional sumo differ depending on the rank to which a wrestler belongs. While incentives for match-rigging can arise for wrestlers in the top divisions (sekitori), few incentives arise for...

This paper looks for statistical evidence of match-rigging by yokozuna (grand champions) in Japanese sumo, which previous studies have not yet examined. The results suggest that yokozuna, too, have been involved in match-rigging, suggesting that economic incentives play an important role in...

Medicine theft is a leading cause of inadequate healthcare. Audits of public health supply chains suggest that up to a third of medicines go missing in low-income countries, disproportionately affecting those facing greater health risks and poverty. Despite much investment, policy-makers...