L11

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  • Publicación |
    El efecto del fenómeno El Niño sobre los precios minoristas corre a través de su efecto sobre los costos mayoristas, exclusivamente, y no a través de cambios en la estructura del mercado minorista.
  • Publicación |
    Abstract

    Price dispersion is a prevalent feature even of markets where, arguably, homogeneous good are traded. At the heart of the causes of price dispersion lie the firms’ strategic interactions with their customers and rivals. Consumers’ eagerness and ability to search for lower prices tends…

  • Publicación |

    We introduce a dispatch model of Colombia's independent system operator (XM) in order to study the relative merits of self-commitment vs. centralized unit comment.  We capitalize on the transition that took place in 2009 from self-unit commitment to centralize unit commitment and use data…

  • Publicación |

    In this paper we discuss cost and profit efficiency for a sample of financial institutions on the Colombian financial market in the period 1989-2003, using stochastic frontier efficiency analysis. During the period, the cost efficient frontier deteriorates, but profit efficient frontier is…

  • Publicación |

    This paper analyzes the determinants of interest margins in the Colombian Financial System. Based on the model by Ho and Saunders (1981), interest margins are modelled as a function of the pure spread and bank-specific institutional imperfections using quarterly data for the period 1994:IV-2005:…