Seminar

One-Sided Generalized Dynamic Factor Models: Representation and Estimation

Paolo Zaffaroni (Imperial College London)

May 28, 2013, 15:30–17:00

Toulouse

Room MF 323

Econometrics Seminar

Abstract

Factor model methods recently have become extremely popular in the theory and practice of large panels of time series data. Those methods rely on various factor models which all are particular cases of the Generalized Dynamic Factor Model (GDFM) introduced in Forni, Hallin, Lippi and Reichlin (2000). In that paper, however, estimation relies on Brillinger’s concept of dynamic principal components, which produces filters that are in general two-sided and therefore yield poor performances at the end of the observation period and hardly can be used for forecasting purposes. In the present paper, we remedy this problem, and show how, based on recent results on singular stationary processes with rational spectra, one-sided estimators are possible for the parameters and the common shocks in the GDFM. consistency is obtained, along with rates. An empirical section, based on US macroeconomic time series, compares estimates based on our model with those based on the usual static representation restriction, and provide convincing evidence that the assumptions underlying the latter are not supported by the data. With : Mario Forni -Universita di Modena e Reggio Emilia, CEPR and RECent, Marc Hallin-ECARES, Université Libre de Bruxelles and ORFE, Princeton University, Marco Lippi-Universita di Roma La Sapienza and EIEF.