Tony Rossell provides some preliminary data on the 2013 Membership Marketing Benchmarking Research.
From our research the lesson has been pretty consistent over time that most associations can easily implement modest dues rate increases without adversely impacting their membership.
See original article at blogspot.com
More Communication Strategies:
Membership Marketing Blog: Early Benchmarking Results Confirm Continued Growth in Association Membership Counts 
Membership Marketing Blog: Free Download of the 2013 Membership Marketing Benchmarking Report Now Available 
Membership Marketing Blog: Winning in Membership Marketing Even if you are Wrong 99.5% of the Time