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RANDOMIZE: Stata module to create random assignments for experimental trials, including blocking, balance checking, and automated rerandomization

Author

Listed:
  • Chris Kennedy

    (University of California, Berkeley)

  • Christopher B. Mann

    (Skidmore College)

Programming Language

Stata

Abstract

randomize conducts random assignment of units to equally sized groups. It can check for balance on a specified list of covariates. If blocking variables are specified it will conduct the randomization within blocks. It can rerandomize within blocks a certain number of times, such as conducting 100 randomizations and choosing the randomization with the best balance across covariates. It can also rerandomize until the balance statistic (Wilks' lambda on a manova) exceeds a certain cut-off value (e.g. 0.2). If unequal allocation sizes are desired, multiple groups can be aggregated after the randomization. Assignments are allocated in a random order within each block, ensuring that group sizes differ by no more than one observation in each block.

Suggested Citation

  • Chris Kennedy & Christopher B. Mann, 2015. "RANDOMIZE: Stata module to create random assignments for experimental trials, including blocking, balance checking, and automated rerandomization," Statistical Software Components S458028, Boston College Department of Economics, revised 01 Jun 2017.
    • Handle: RePEc:boc:bocode:s458028
    Note: This module should be installed from within Stata by typing "ssc install randomize". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
    as

    Download full text from publisher

    File URL: http://fmwww.bc.edu/repec/bocode/r/randomize.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/r/randomize.sthlp
    File Function: help file
    Download Restriction: no
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