Efficiency in Large Dynamic Panel Models with Common Factor
This paper deals with efficient estimation in exchangeable nonlinear dynamic panel models with common unobservable factor. The specification accounts for both micro- and macro-dynamics, induced by the lagged individual observation and the common stochastic factor, respectively. For large cross-sectional and time dimensions, and under a semiparametric identification condition, we derive the efficiency bound and introduce efficient estimators for both the micro- and macro-parameters. In particular, we show that the fixed effects estimator of the micro-parameter is not only consistent, but also asymptotically efficient. The results are illustrated with the stochastic migration model for credit risk analysis.
|Date of creation:||Aug 2008|
|Date of revision:||Mar 2009|
|Contact details of provider:|| Web page: http://www.SwissFinanceInstitute.ch|
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