A Declining Portion of Union Members are Young because ....... a declining share of workers are young

The WSJ ran a piece about unions are having increasing difficulty attracting young members. The article noted that in 1983, 39.6 percent of union members were between the ages of 16 and 34. This figure had fallen to just 24.6 percent in 2010, a drop of 15.0 percentage points. [I should point out that the source of these numbers is my colleague at CEPR, John Schmitt. I apologize for the CEPR promotion.] 

This might seem to suggest an alarming failure for unions in their ability to craft a...