Jens Hainmueller, Duncan Lawrence, Justin Gest, Michael Hotard, Rey Koslowski, David D. Laitin, A randomized controlled design reveals barriers to citizenship for low-income immigrants, Proceedings of ...

A randomized controlled trial of a community health worker intervention in a population of patients with multiple chronic diseases: study design and protocol. Contemp Clin Trials. 2017;53:115–21.

We conducted this phase 2, multicenter, randomized, double-blind, placebo-controlled trial in the United States (see the Supplementary Appendix, available with the full text of this article at ...

Many groundbreaking vaccines were initially tested using this methodology. For example, the Salk polio vaccine field trial in the 1950s employed a randomized, placebo-controlled design.