• Entry
  • Reader's guide
  • Entries A-Z
  • Subject index

Experiments, Randomized

Researchers often use a randomized experiment (also known as a randomized field or controlled trial, or a true or classical experiment) to evaluate the effects of a legal policy, practice, or program. Because they consider randomized experiments the most rigorous approach to such evaluation, they often refer to true experiments as the “gold standard.”

Definition and Characteristics

A randomized experiment is an evaluation design that uses randomization (also known as random allocation or random assignment) to achieve statistically balanced groups. In the typical experiment, the researchers test the impact of an intervention on outcome measures of interest by comparing an experimental group that receives an intervention with a control group that does not. Experiments usually include individuals as the unit of analysis, but it is now becoming ...

    • Loading...
    locked icon

    Sign in to access this content

    Get a 30 day FREE TRIAL

    • Watch videos from a variety of sources bringing classroom topics to life
    • Read modern, diverse business cases
    • Explore hundreds of books and reference titles