Private Sector Unionization in Pittsburgh
While the data used to calculate that has a fair bit of volatility and sample error, note it is the same data used to calculate the unemployment rate we all over-parse each month. Probably comparable error in the two metrics, so either use them both or discount them both equally. With that caveat, the latest data is showing what has to be a new all-time low in the rate of unionization here, or at least the lowest since the Sons of Vulcan stood up shop here. Again, given some measurement caveats, it looks like the biggest annual drop in data back to 1986 at least.
I will not be surprised if there is not some reversion in that dip when data for 2014 is calculated. Still, a decade ago I thought stabilization in this time series might lead to an uptick going forward. That looks not to have happened.