A Comment on "Cycles and Instability in a Rock-Paper-Scissors Population Game: A Continuous Time Experiment"

The authors (Cason, Friedman and Hopkins, Review of Economic Studies, 2014) claimed that control treatments (using simultaneous matching in discrete time) replicate previous results that exhibit weak or no cycles. After correcting two mathematical mistakes in their cycles tripwire algorithm, we study the cycles by scanning the tripwire in the full strategy space of the games and we find significant cycles that were omitted by the authors. So we suggest that all of the treatments exhibit significant cycles.