ARLINGTON, Va.— Last week, two newspaper boxes for The Onion appeared on my block in Pentagon City. Back in January, I blogged about The Onion’s arrival.

The Onion is not available until April 5, but it already has two more boxes on the block than the CityPaper. Even though they are different types of publications, they are competitors. Why? Advertising. Both are publications target the 18-34 audience and at least in Pentagon City, The Onion clearly has the edge in reaching that audience.