In terms of trajectories and transition to retirement, to measure those kinds of studies you really need a longitudinal survey. A number of countries have created longitudinal surveys on aging, and retirement specifically.
A new longitudinal survey was launched two years ago, called LISA, the longitudinal and international study of adults. It had a collection last year, and the results should be released in the fall of 2013. In that one, because we had asked respondents for their permission to use some administrative records...already in the first wave of information we'll be able to go back in time and try to see who had employment income, maybe who stopped and started again, and we'll try to see where they are now. It may not give us a full picture, but it will start to highlight some of the questions you're asking about the information.
We had a predecessor in the survey of labour and income dynamics, and I can try to see if we can provide you with a bit of information on trends—not reasons, but trends. Maybe I can look at something, and with LISA we should also be able to provide you with information.