Look at Swedish reform, where DB was changed to DC system.

http://documents.worldbank.org/curated/en/2012/06/16439040/nonfinancial-defined-contribution-pension-schemes-changing-pension-world-progress-lessons-implementation

see this Worl Bank book, with a lot of examples!

Look also at the Polish Case. In 1999 we changed DB to NDC+DC  

Look at research published by Olivia Mitchell of the Wharton School of Business and head of the Pension Research Counsel --search for research on "plan design".  Also look for experiments and research by Steve Utkus, of Vanguard, who has worked with her. 

A team of academics who have done a lot of research in this area are Bridgette Madrian, David Laibson, James Choi, and John Beshears

We run a stochastic simulation model with different versions of parameterized NDC pension system to demographic and economic situation in Mexico. We show that the sustainability of the NDC system is an argument to support a proposal to reform pension plans in Mexico.