The growth in the availability of longitudinal data--data collected over time on the same individuals--as part of program evaluations has opened up exciting possibilities for evaluators to ask more nuanced questions about how individuals' outcomes change over time. However, in order to leverage longitudinal data to glean these important insights,…

This handbook was compiled to assist OECD Member countries in the long term development of their educational statistics and to provide them with a basis of comparison for the collection of internationally comparable statistics useful to educational planners. Recent methodologica" approaches to long term planning are also discussed. The…