*I did not conduct data analyses for this project, but please email me at firstname.lastname@example.org to request access to data/syntax files and I will contact my co-author. **Citation:** Aizpitarte, A., Atherton, O.E., Zheng, L.R., Alonso-Arbiol, I., & Robins, R.W. (in press). Developmental precursors of relational aggression among Mexican-origin youth. *Child Development*.