A useful warning from an economist.
In economics, RCTs have been all the rage, especially in the field of international development, despite critiques by the Nobel laureate Angus Deaton, Lant Pritchett, andDani Rodrik, who have attacked the inflated claims of RCT’s proponents. One serious shortcoming is external validity. Lessons travel poorly: If an RCT finds out that giving micronutrients to children in Guatemala improves their learning, should you give micronutrients to Norwegian children?
Stuart Butler at Brookings supports the argument.
So does Dan Davies.
Related: "The politics of evidence-based policymaking".