In this article, the authors examine the relationship between an employer's implementation of a typical dispute resolution system (DRS) and organizational justice, perceived compliance with the law, and organizational commitment. They draw on unique data from a single, geographically expansive, U.S. firm with more than 100,000 employees in more than 1,000 locations. Holding all timeconstant, location-level variables in place, they find that the introduction of a DRS is associated with elevated perceptions of interactional justice but diminished perceptions of procedural justice. They also find no discernible effect on organizational commitment, but a significant boost to perceived legal compliance by the company. The authors draw on these findings to offer a "differentialeffects" model for conceptualizing the relationship among organizational justice, perceived legal compliance, and the implementation of dispute resolution mechanisms.I n this article, we examine the effects of implementation of a typical workplace dispute resolution system (DRS) on employees covered by the DRS, the vast majority of whom are never claimants or participants in a claim submitted through the DRS. This inquiry is made possible by access to a unique set of survey data from a large national company that, at its peak, employed more than 100,000 workers in more than 1,000 locations. The employer implemented the DRS, described in more detail below, in the middle of the eight-year span of the study, enabling a rare glimpse into *Author names are in alphabetical order.