Randomized Controlled Trials
Randomized controlled trials are the gold standard in research, producing causal evidence about the efficacy and impact of policies and programs.
A randomized controlled trial, or RCT, is considered the gold standard in research. A RCT is a rigorous study that randomly assigns participants to either a “treatment group” who are offered the intervention, or a “control group” who have access to all other services except for the intervention. By measuring what would have happened to the treatment group without the intervention, an RCT lets researchers isolate the effect of the intervention itself.
The Crime Lab uses RCTs as our preferred method of project evaluation wherever possible. While RCTs can be time and resource intensive, they generate high-quality results to ensure that our partners and policymakers can make informed decisions about how to best support communities affected by gun violence.
Latest Updates
We’ve Been Thinking About Gun Violence All Wrong
Jens Ludwig, Crime Lab Pritzker Director and author of “Unforgiving Places: The Unexpected Origins of American Gun Violence,” pens an op-ed for TIME Magazine arguing that the root cause of gun violence is not what we think it is — rather than a deliberate, rational act, most shootings start with arguments that escalate and end in tragedy because someone has a gun.

The Indicator from Planet Money: What we misunderstand about gun violence
Crime Lab Pritzker Director Jens Ludwig joins NPR’s The Indicator from Planet Money podcast to discuss why he believes many of us fundamentally misunderstand the problem of gun violence and how behavioral economics reveals some potential solutions.

Rethinking Gun Violence
Vital City sat down with Crime Lab Pritzker Director Jens Ludwig to discuss his new book, Unforgiving Places: The Unexpected Origins of American Gun Violence,” which shows how changing individual behavior is possible — and that these changes can result in declines in gun violence.
