%0 Journal Article %T Problematics of Time and Timing in the Longitudinal Study of Human Development: Theoretical and Methodological Issues %A Lerner, Richard M. %A Schwartz, Seth J. %A Phelps, Erin %J Human Development %V 52 %N 1 %P 44-68 %@ 0018-716X %D 2009-01-01 %I S. Karger AG %~ DeepDyve