Spectrum auctions explained (by Scott Kominers in Bloomberg)

Explaining economics is something economists should do more of (especially in light of some of the silly things written about economics in the popular press by people who misunderstand what they are writing about).  Here's a good example of good explanation, written clearly, by an expert:

To Improve Wireless Networks, Auction the Airwaves:
People are watching TV on devices, so mobile companies need more spectrum and broadcasters need less. Here's how to get there.
By Scott Duke Kominers