References
Mitchell, N.M. (2020). Data Management Using Stata: A Practical Handbook. (2nd ed.). Stata Press.
UCLA Advanced Research Computing. (2025). Stata Learning Modules. Retrieved from https://stats.oarc.ucla.edu/stata/modules/
Mitchell, N.M. (2020). Data Management Using Stata: A Practical Handbook. (2nd ed.). Stata Press.
UCLA Advanced Research Computing. (2025). Stata Learning Modules. Retrieved from https://stats.oarc.ucla.edu/stata/modules/