Photo: SkyPics Studio/Shutterstock Data on the sharing economy (Uber, Airbnb and so on) are scarce, but a recent study estimates that the revenue growth of these platforms has been dramatic. In…

With deep azure skies, bountiful sunshine, and a crisp but mild breeze today, spring is by far my favorite season in Washington. Today marks the 40th year since the advent of Earth Day, an…