The appendices follow the organization of the paper. Appendix A details the data sources and the procedures used to link and clean the data. Appendix B presents further details on the estimation procedure, Monte Carlo simulations to assess the sensitivity to mis-specification, and details on the optimization algorithms used in the paper. Appendix C presents details on the instrument. Appendix D discusses the parameter estimates under the alternative models. Appendix E presents proofs of the theoretical results on salary competition used in the paper.