As part of the credibility revolution in applied economics, researchers need to turn away from significance thresholds and stars, and instead focus on economic importance. Yet, existing measures of importance in regression analysis have fundamental flaws. Using an axiomatic approach, I develop...

This article describes methods used in the field of spatial economics that combine insights from economic theory and evidence from data in order to answer counter- factual questions. I outline a general framework that emphasizes three elements: a specific question to be answered, a set of...