Catherine Rampell: Alan Krueger’s minimum wage research was remarkable. So was his happiness work.

When I first learned of Princeton University economics professor Alan Krueger's tragic passing over the weekend, I thought about happiness.Sure, most people would probably associate this intellectual giant and longtime public servant with his work on the minimum wage. In a paper looking at cross-state labor markets, he upturned decades of conventional wisdom that said raising the minimum wage would necessarily reduce employment. His finding that a higher wage floor could actually increase jobs f