Tenure and Output
---- Acknowledgements -----
Forthcoming, Labour Economics, 2007. We thank John Abowd, Joe Altonji, Avner Ben-Ner, Nicolas Williams, and referees for their suggestions and thank participants for meetings of the Society of Labor Economics and the ASSA meetings. We thank Valentin Agafonov and Diane Lee for excellent research assistance. The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research.