00350nam a2200121Ia 4500020001500000082002400015100002100039245008200060260004800142300002800190500000500218700000500223  a0521535387  a330.015195bF857.LP  aFrees, Edward W.  aLongitudinal and panel databanalysis and applications in the social sciences  aCambridgebCambridge University Pressc2004  axvi, 467p. Bibl. Index.  a  a