In this study we tested the validity of justice climate and peer justice, measured as second-order constructs, in a real work setting. First, we investigated the appropriateness of aggregating first-order facets of justice climate and peer justice to work-unit level of analysis. Second, we examined the construct validity of justice climate and peer justice as two different factor structures. Third, we tested the hierarchical structure of justice climate and peer justice as second-order factors. Finally, we examined the predictive validity of second-order factors justice climate and peer justice within a nomological network composed of reciprocity with the supervisor and reciprocity with coworkers. We conducted these analyses in a sample of 532 employees nested in 79 organizations. Our results suggest the validity of justice climate and peer justice measured as second-order factors. We discuss these results and their implications for organizational justice research. (C) 2016 Colegio Oficial de Psicologos de Madrid. Published by Elsevier Espana, S.L.U.