Przeglądaj wg Autor "Wróbel-Rotter, Renata"

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    Bayesowskie graniczne funkcje kosztu dla sektora dystrybucji energii
    (Oficyna Wydawnicza AFM, 2009) Osiewalski, Jacek; Wróbel-Rotter, Renata
    The paper discusses the application of the Bayesian stochastic frontier cost functions as a tool for assessing and comparing the cost efficiency of firms. The analysis is based on the microeconomic production theory and the concept of inefficiency that is related to the existence of inner mechanisms responsible for observing costs higher than indicated by theory, given technical and economic environment of firms. The stochastic cost frontier a llows to estimate individual cost efficiency and to precisely decompose the observed cost into theoretical categories, such as minimal excessive or systematic cost, which play crucial role in assessing the economic behavior of firms. From the empirical perspective the most important is the minimal cost, which denotes the cost that is indispensable to achieve the observed production level giv en technology, input prices, cost effects of random variability. The Bayesian estimation of stochastic cost frontiers for panel data allows to treat a number of issues unsolved on the classical ground, such as stability of empirical results, assessment of the uncertainty of cost categories and efficiency coefficients. As a fundamental tool for the analysis we present the Bayesian random effects mode l with constant efficiency distribution. The methodology is illustrated with the cost function for the 14 firms operating in the electricity distribution sector observed over 6 years.
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    Dynamiczne stochastyczne modele równowagi ogolnej: Zarys metodologii badań empirycznych
    (Oficyna Wydawnicza AFM, 2007) Wróbel-Rotter, Renata
    The paper presents general idea of construction and estimation of Dynamic Stochastic General Equilibrium Models. Models belonging to the class of DSGE combine in one specification the optimization behavior of consumers and producers with mechanisms that allow to model the nominal and real rigidities observed at the macroeconomic level. DSGE models are widely applied by financial institutions as a consequence of their ability to flexibly include and test alternative economic hypotheses and the existence of estimation methods. The article begins by reviewing main components of the theoretical model with discussion of the most important assumptions, which is followed by presentation of methods for solving rational expectation models and the Bayesian estimation of structural parameters.
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    Folia Oeconomica Cracoviensia, Vol. LIII
    (Krakowska Akademia im. Andrzeja Frycza Modrzewskiego, Polska Akademia Nauk - Oddział w Krakowie - Komisja Nauk Ekonomicznych i Statystyki, 2012) Marzec, Jerzy; Osiewalski, Jacek; Pipień, Mateusz; Prędki, Artur; Wróbel-Rotter, Renata; Iwasiewicz, Andrzej
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    Folia Oeconomica Cracoviensia, Vol. XLIX-L
    (Krakowska Akademia im. Andrzeja Frycza Modrzewskiego, Polska Akademia Nauk - Oddział w Krakowie - Komisja Nauk Ekonomicznych i Statystyki, 2009) Kosiorowski, Daniel; Gurgul, Henryk; Wójtowicz, Tomasz; Osiewalski, Jacek; Wróbel-Rotter, Renata; Iwasiewicz, Andrzej; Grabiński, Tadeusz; Kwiatkowski, Łukasz; Kwiatkowski, Jacek; Iwasiewicz, Andrzej
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    Folia Oeconomica Cracoviensia, Vol. XLVIII
    (Krakowska Akademia im. Andrzeja Frycza Modrzewskiego, Polska Akademia Nauk - Oddział w Krakowie - Komisja Nauk Ekonomicznych i Statystyki, 2007) Gurgul, Henryk; Majdosz, Paweł; Młodkowski, Paweł; Fiszeder, Piotr; Wróbel-Rotter, Renata; Pipień, Mateusz; Denkowska, Sabina; Broda, Zdzisław Jan; Iwasiewicz, Andrzej
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    Wybrane zagadnienia współczesnego modelowania strukturalnego, Część I: Estymowane modele równowagi ogólnej w zarysie
    (Oficyna Wydawnicza AFM, 2012) Wróbel-Rotter, Renata
    The paper presents mail building blocks of the estimated general equilibrium models. Models belonging to that class combine in one specification the optimization behavior of consumers and producers with mechanisms that allow to model the nominal and real rigidities observed at the macroeconomic level. Moreover, they allow flexibly to test alternative economic hypotheses. This article contains the first p art of the methodology that discusses theoretical assumptions, the second one is devoted to estimation and verification methods and will appear as the continuation article. The goal is to present wide context of they usefulness and highlight methodological challenges.
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    Wybrane zagadnienia współczesnego modelowania strukturalnego, Część II: wnioskowanie w estymowanych modelach równowagi ogólnej
    (Oficyna Wydawnicza AFM, 2012) Wróbel-Rotter, Renata
    The paper presents methods of estimation and evaluation of general equilibrium models, highlights problematic fields and challenges. After definition of preferences, technology and structural shocks model's equations, derived by solving microeconomic optimization problems, are loglinearised and the rational expectation solution is found. The next important step is the connection of theoretical variables with the observed counterparts tha t allows to construct the likelihood. Estimation, verification and numerical convergence plays crucial role in the overall goodness of the model. A general equilibrium model can also be used to construct hybrid vector autoregression that allows to test degree of its misspecification.