Per citar aquest document: http://ddd.uab.cat/record/69620
Heterogeneous dynamics, aggregation and the persistence of economic shocks
Mayoral, Laura
Universitat Autònoma de Barcelona. Unitat de Fonaments de l'Anàlisi Econòmica
Universitat Autònoma de Barcelona. Institut d'Anàlisi Econòmica

Data: 2009
Descripció: 39 p.
Col·lecció: Working papers ; 786.09
Resum: It has been recently emphasized that, if individuals have heterogeneous dynamics, estimates of shock persistence based on aggregate data are significatively higher than those derived from its disaggregate counterpart. However, a careful examination of the implications of this statement on the various tools routinely employed to measure persistence is missing in the literature. This paper formally examines this issue. We consider a disaggregate linear model with heterogeneous dynamics and compare the values of several measures of persistence across aggregation levels. Interestingly, we show that the average persistence of aggregate shocks, as measured by the impulse response function (IRF) of the aggregate model or by the average of the individual IRFs, is identical on all horizons. This result remains true even in situations where the units are (short-memory) stationary but the aggregate process is long-memory or even nonstationary. In contrast, other popular persistence measures, such as the sum of the autoregressive coefficients or the largest autoregressive root, tend to be higher the higher the aggregation level. We argue, however, that this should be seen more as an undesirable property of these measures than as evidence of different average persistence across aggregation levels. The results are illustrated in an application using U. S. inflation data.
Drets: Aquest document està subjecte a una llicència d'ús de Creative Commons, amb la qual es permet copiar, distribuir i comunicar públicament l'obra sempre que se'n citin l'autor original, la universitat, la unitat i l'institut i no se'n faci cap ús comercial ni obra derivada, tal com queda estipulat en la llicència d'ús Creative Commons
Llengua: Anglès.
Document: workingPaper
Matèria: Heterogeneous dynamics, aggregation, persistence, impulse response function, sum of the autoregressive coefficients, U.S. inflation persistence.

Adreça alternativa: http://hdl.handle.net/2072/41984


39 p, 341.1 KB

El registre apareix a les col·leccions:
Documents de recerca > Working papers

 Registre creat el 2011-04-04, darrera modificació el 2016-06-11



   Favorit i Compartir