950 resultados para CICLOS ECONOMICOS


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Introducción: En el párrafo que citamos, de Sir John R. Hicks, el economista británico reconoce la importancia de tener un abordaje del proceso económico y de las situaciones de desajuste que influyen en su marcha, desde una posición que considere la importancia del capital, el tiempo, y el rol preponderante de la tasa de interés. Que tenga, asimismo, en consideración toda la dinámica del fenómeno de formación de capital y de elección entre distintos sistemas de producción. Ya antes había manifestado: “¿Qué determina el equilibrio de corto plazo de un sistema cerrado, cuando se le concibe no solo en términos de gustos y recursos, sino en términos de planes y expectativas, orientado hacia el futuro que queda fuera del período en cuestión?” (2) Pero: ¿Por qué este interés en analizar el proceso de elección de sistemas de producción y de formación de capital desde una visión dinámica y considerando el punto de vista de los comerciantes, o tomadores de decisión en la economía, es decir, si se prefiere, de los empresarios? ¿De donde surge esta idea? El subtitulo del libro citado en el epígrafe nos puede dar una pista

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Resumen: Axel Leijonhufvud, economista reconocido internacionalmente por sus trabajos sobre la literatura de John Maynard Keynes y el keynesianismo (Leijonhufvud, 1968), ofreció su lectura de la crisis subprime de 2008, reconociendo que la misma encaja más con la teoría austríaca del ciclo económico de Ludwig von Mises y Friedrich Hayek, que con el marco teórico keynesiano. En este artículo ofrecemos evidencia para tal afirmación.

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Esse artigo usa uma metodologia de decomposição tendência-ciclo para estimar o produto potencial brasileiro e investigar a importância relativa dos choques permanentes e transitórios. Conclui-se que os primeiros explicam quase que 100% da variância do produto privado. A partir desta evidência, investiga-se a existência de relações de longo prazo entre o produto potencial e diversos possiveis determinantes do crescimento a longo prazo, como investimentos externos, escolaridade média e taxa de analfabetismo da população econolTÚcamente ativa. Conclui-se que as duas primeiras possuem uma relação de longo prazo com o produto potencial, e que a elasticidade de longo prazo é não desprezível. A luz desta evidência, discute-se questões de política econômica.

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Although there has been substantial research on long-run co-movement (common trends) in the empirical macroeconomics literature. little or no work has been done on short run co-movement (common cycles). Investigating common cycles is important on two grounds: first. their existence is an implication of most dynamic macroeconomic models. Second. they impose important restrictions on dynamic systems. Which can be used for efficient estimation and forecasting. In this paper. using a methodology that takes into account short- and long-run co-movement restrictions. we investigate their existence in a multivariate data set containing U.S. per-capita output. consumption. and investment. As predicted by theory. the data have common trends and common cycles. Based on the results of a post-sample forecasting comparison between restricted and unrestricted systems. we show that a non-trivial loss of efficiency results when common cycles are ignored. If permanent shocks are associated with changes in productivity. the latter fails to be an important source of variation for output and investment contradicting simple aggregate dynamic models. Nevertheless. these shocks play a very important role in explaining the variation of consumption. Showing evidence of smoothing. Furthermore. it seems that permanent shocks to output play a much more important role in explaining unemployment fluctuations than previously thought.

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Reduced form estimation of multivariate data sets currently takes into account long-run co-movement restrictions by using Vector Error Correction Models (VECM' s). However, short-run co-movement restrictions are completely ignored. This paper proposes a way of taking into account short-and long-run co-movement restrictions in multivariate data sets, leading to efficient estimation of VECM' s. It enables a more precise trend-cycle decomposition of the data which imposes no untested restrictions to recover these two components. The proposed methodology is applied to a multivariate data set containing U.S. per-capita output, consumption and investment Based on the results of a post-sample forecasting comparison between restricted and unrestricted VECM' s, we show that a non-trivial loss of efficiency results whenever short-run co-movement restrictions are ignored. While permanent shocks to consumption still play a very important role in explaining consumption’s variation, it seems that the improved estimates of trends and cycles of output, consumption, and investment show evidence of a more important role for transitory shocks than previously suspected. Furthermore, contrary to previous evidence, it seems that permanent shocks to output play a much more important role in explaining unemployment fluctuations.

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We use the information content in the decisions of the NBER Business Cycle Dating Committee to construct coincident and leading indices of economic activity for the United States. We identify the coincident index by assuming that the coincident variables have a common cycle with the unobserved state of the economy, and that the NBER business cycle dates signify the turning points in the unobserved state. This model allows us to estimate our coincident index as a linear combination of the coincident series. We establish that our index performs better than other currently popular coincident indices of economic activity.

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We use the information content in the decisions of the NBER Business Cycle Dating Committee to construct coincident and leading indices of economic activity for the United States. We identify the coincident index by assuming that the coincident variables have a common cycle with the unobserved state of the economy, and that the NBER business cycle dates signify the turning points in the unobserved state. This model allows us to estimate our coincident index as a linear combination of the coincident series. We establish that our index performs better than other currently popular coincident indices of economic activity.

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We study constrained efficient aggregate risk sharing and its consequence for the behavior of macro-aggregates in a dynamic Mirrlees’s (1971) setting. Privately observed idiosyncratic productivity shocks are assumed to be independent of i.i.d. publicly observed aggregate shocks. Yet, private allocations display memory with respect to past aggregate shocks, when idosyncratic shocks are also i.i.d.. Under a mild restriction on the nature of optimal allocations the result extends to more persistent idiosyncratic shocks, for all but the limit at which idiosyncratic risk disappears, and the model collapses to a pure heterogeneity repeated Mirrlees economy identical to Werning [2007]. When preferences are iso-elastic we show that an allocation is memoryless only if it displays a strong form of separability with respect to aggregate shocks. Separability characterizes the pure heterogeneity limit as well as the general case with log preferences. With less than full persistence and risk aversion different from unity both memory and non-separability characterize optimal allocations. Exploiting the fact that non-separability is associated with state-varying labor wedges, we apply a business cycle accounting procedure (e.g. Chari et al. [2007]) to the aggregate data generated by the model. We show that, whenever risk aversion is great than one our model produces efficient counter-cyclical labor wedges.

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We use the information content in the decisions of the NBER Business Cycle Dating Committee to construct coincident and leading indices of economic activity for the United States. We identify the coincident index by assuming that the coincident variables have a common cycle with the unobserved state of the economy, and that the NBER business cycle dates signify the turning points in the unobserved state. This model allows us to estimate our coincident index as a linear combination of the coincident series. We compare the performance of our index with other currently popular coincident indices of economic activity.

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This paper has three original contributions. The first is the reconstruction effort of the series of employment and income to allow the creation of a new coincident index for the Brazilian economic activity. The second is the construction of a coincident index of the economic activity for Brazil, and from it, (re) establish a chronology of recessions in the recent past of the Brazilian economy. The coincident index follows the methodology proposed by The Conference Board (TCB) and it covers the period 1980:1 to 2007:11. The third is the construction and evaluation of many leading indicators of economic activity for Brazil which fills an important gap in the Brazilian Business Cycles literature.

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Instituto Brasileiro de Economia

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In a general equilibrium Ramsey type model with heterogeneous agents we study the conditions for which a credit restriction can be a source of endogenous cycle to credit and capital.

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We develop and quantitatively implement a dynamic general equilibrium model with labor market matching and endogenous deterllÚnation of the job destruction rate. The mo deI produces a elose match with data on job creation and destruction. Cyelical fluctuations in the job destruction rate serve to magnify the effects of productivity shocks on output; as well as making the effects much more persistent. Interactions between the labor and capital markets, mediated by the rental rate of capital, play the central role in propagating shocks.