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 … empirical analysis, which show that match-rigging in the top divisions has declined in the post-Duggan and Levitt (2002) period …

distribution of returns for odds’ subgroups displayed the so-called favorite long shot (F/L) bias. Given the evidence of match-rigging … deal with insiders. My results support that match-rigging was associated with a larger F/L bias. …