Regional economic development lost two intellectual giants over the past 2 years: Bennett Harrison and Benjamin H. Stevens. Their lives intersected, and their written work defines two aspects of what economic development has become as an applied field in social science: technique and application.Both of the "Bens" put their stamp on this issue of Economic Development Quarterly. They did so in different ways, yet in ways that typified their careers and personalities. Both had abiding interests in applying analysis to real-world problems that spin out of regional development. One side of Ben Stevens's work was concerned with theory and the application of statistics and models to regional development. He was a pioneer in the use of linear programming and input-output models in regional analysis. Stevens also wrote a classic review of location theory that has stood the test of time (Stevens, 1985).