This replication package contains the dataset and the R scripts required to reproduce the empirical analysis presented in the article “Testing Zipf’s and Gibrat’s Laws in the Spanish University System: Evidence from a decade of institutional transformation.” The dataset is constructed using official student enrolment data obtained from the Spanish Ministry of Science, Innovation and Universities. The package includes the data file, the R code used to generate the estimations and figures reported in the article, and a README file providing instructions for reproducing the results.