TY  - JOUR
AU  - Abowd,John M.
AU  - Crepon,Bruno
AU  - Kramarz,Francis
TI  - Moment Estimation with Attrition
JF  - National Bureau of Economic Research Technical Working Paper Series
VL  - No. 214
PY  - 1997
Y2  - August 1997
UR  - http://www.nber.org/papers/t0214
L1  - http://www.nber.org/papers/t0214.pdf
N1  - Author contact info:
John M. Abowd
School of Industrial and Labor Relations
261 Ives Hall
Cornell University
Ithaca, NY 14853
Tel: 607/255-8024
Fax: 866/873-9078
E-Mail: John.Abowd@cornell.edu

Bruno Crepon
CREST
15, boulevard Gabriel Peri
92245 Malakoff Cedex
France
E-Mail: crepon@ensae.fr

Francis Kramarz
CREST-INSEE
15 blvd Gabriel Peri
Malakoff CEDEX, 92245
FRANCE
E-Mail: kramarz@ensae.fr
AB  - We present a method that accommodates missing data in longitudinal datasets of the type usually encountered in economic and social applications.  The technique uses various extensions of  missing at random' assumptions that we customize for dynamic models.  Our method, applicable to longitudinal data on persons or firms, is implemented using the Generalized Method of Moments with reweighting that appropriately corrects for the attrition bias caused by the missing data.  We apply the method to the estimation of dynamic labor demand models.  The results demonstrate that the correction is extremely important.
ER  -