There are two major reasons why policymakers pay greater attention to case studies than empirical models. First, they are generally older, having completed their primary education well before the behavioral revolution, and the government doesn’t provide much incentive to stay current in your field. Case studies are generally easy to understand and appreciate regardless of your educational level or methodological training. Second, the tension between qualitative and quantitative analysis in the government is, in times and places, much more acrimonious than it is in many political science departments, but this applies more at the level of the government analyst than the policymaker.

Carment Rowlands Formal Models and Conflict Intervention