Consider two workers, bruce and bert, who both have the same job description; for example, they both sell widgets. also consider that they work side-by-side at a widget stand, and they are both paid hourly by their boss, and they both know each other’s hourly wage. at first their hourly wages are the same, and each hour they each sell roughly equal numbers of widgets. then their boss decreases bert’s hourly wage relative to bruce’s and bert knows it. according to the findings of cohn and coworkers (2014, journal of the european economic association 12: 877-898), what does bert do? :