I had meant to post something about a short Statistics Canada article that was released in November 2013 entitled Long Term Trends in Unionization. The authors looked at unionization rates in Canada from 1981 to 2012. The Overview provides a good summary of the findings. These statistics identify some interesting trends and no doubt will inform the way in which unions go about trying to add to their ranks.
Employers (particularly those in certain sectors) would be well advised to keep an eye on these developments and take measures to address, in a proactive manner, different and more assertive union strategies that try to turn their ship.