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Heterogeneidad observada y no observada en la formación de los precios del IPC colombiano

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  • Juan Manuel Julio

Abstract

En este trabajo se caracterizan las reglas de precios de los minoristas colombianos a través de funciones de hazard. Se enfatiza la reducción del sesgo derivado de la heterogeneidad observada como no observada en dichas funciones. El efecto de la heterogeneidad observada se reduce al estimar la hazard a niveles muy desagregados, a través de la estratificación, al incluir variables de estado y al estimar estas separadamente para incrementos y disminuciones. El efecto de la heterogeneidad no observada se reduce al introducir un término de efectos aleatorios denominado fragilidad, frailty, que permite a minoristas del mismo estrato tener rachas de precios más cortas que otros. La base de datos contiene 12’052.970 reportes de precios y cubre un periodo de tiempo con inflación decreciente y otro con inflación creciente, la cual la hace ideal para estudiar la presencia de costos de menú.

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  • Juan Manuel Julio, 2010. "Heterogeneidad observada y no observada en la formación de los precios del IPC colombiano," Revista ESPE - Ensayos sobre Política Económica, Banco de la Republica de Colombia, vol. 28(63), pages 66-99, December.
    • Handle: RePEc:bdr:ensayo:v:28:y:2010:i:63:p:66-99
    DOI: 10.32468/Espe.6302
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    Cited by:

    1. Juan Manuel Julio-Román, 2019. "Estimating the Exchange Rate Pass-Through: A Time-Varying Vector Auto-Regression with Residual Stochastic Volatility Approach," Borradores de Economia 1093, Banco de la Republica de Colombia.
    2. Andrés González & Lavan Mahadeva & Juan D. Prada & Diego Rodríguez, 2011. "Policy Analysis Tool Applied to Colombian Needs: Patacon Model Description," Revista ESPE - Ensayos Sobre Política Económica, Banco de la República, vol. 29(66), pages 222-245, December.
    3. Martha Misas A. & Juan Carlos Parra A. & Enrique López E., 2011. "Heterogeneidad en la fijación de precios en Colombia: análisis de sus determinantes a partir de modelos de conteo," Vniversitas Económica, Universidad Javeriana - Bogotá, vol. 0(0), pages 1-40, January.

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    More about this item

    Keywords

    Fijacion de precios; Rigideces de Precios; modelos de duracion; función hazard;
    All these keywords.

    JEL classification:

    • D74 - Microeconomics - - Analysis of Collective Decision-Making - - - Conflict; Conflict Resolution; Alliances; Revolutions
    • Q1 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture

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