Risultati della ricerca
Creator: Luttmer, Erzo G. J. Series: Working paper (Federal Reserve Bank of Minneapolis. Research Department) Number: 703 Abstract:
Consider an economy in which various types of labor are used to produce consumption, but not all types of labor are useful for upgrading the stock of organization capital–that is, for replacing old projects with more productive new projects. When news induces consumers to want to save more, low-quality projects are destroyed across all sectors of the economy, even though the economy is set to increase its stock of new projects. Labor that can be used to create new projects becomes more expensive and labor that cannot becomes cheap. Average wages may not change at all, and the employment of workers who cannot invest in new projects will decline. If physical capital complements the inputs of these workers, investment in physical capital tends to move together with their employment. These results are derived analytically for a prototype economy that has the essential ingredients of empirically relevant equilibrium models of firm heterogeneity.
Parola chiave: Aggregate consumption, Factor prices, and Bayesian updating Soggetto: E25 - Aggregate Factor Income Distribution, E32 - Business Fluctuations; Cycles, and L16 - Industrial Organization and Macroeconomics: Industrial Structure and Structural Change; Industrial Price Indices
Creator: Geweke, John Series: Working paper (Federal Reserve Bank of Minneapolis. Research Department) Number: 532 Abstract:
This paper integrates and extends some recent computational advances in Bayesian inference with the objective of more fully realizing the Bayesian promise of coherent inference and model comparison in economics. It combines Markov chain Monte Carlo and independence Monte Carlo with importance sampling to provide an efficient and generic method for updating posterior distributions. It exploits the multiplicative decomposition of marginalized likelihood into predictive factors, to compute posterior odds ratios efficiently and with minimal further investment in software. It argues for the use of predictive odds ratios in model comparison in economics. Finally, it suggests procedures for public reporting that will enable remote clients to conveniently modify priors, form posterior expectations of their own functions of interest, and update the posterior distribution with new observations. A series of examples explores the practicality and efficiency of these methods.
This paper was prepared for the inaugural Colin Clark Lecture, Australasian Meetings of the Econometric Society, July 1994.
Parola chiave: Computation, Model comparison, Bayesian inference, and Econometric modeling Soggetto: C53 - Forecasting Models; Simulation Methods and C11 - Bayesian Analysis: General
Creator: Boot, Arnoud W. A. (Willem Alexander), 1960-, Greenbaum, Stuart I., and Thakor, Anjan V. Series: Economic growth and development Abstract:
The paper proposes a theory of ambiguous financial contracts. Leaving contractual contingencies unspecified may be optimal, even when stipulating them is costless. We show that an ambiguous contract has two advantages. First, it permits the guarantor to sacrifice reputational capital in order to preserve financial capital as well as information reusability in states where such tradeoff is optimal. Second, it fosters the development of reputation. This theory is then used to explain ambiguity in mutual fund contracts, bank loan commitments, bank holding company relationships, the investment banker's "highly confident" letter, non-recourse debt contracts in project financing, and other financial contracts.
Soggetto: G20 - Financial Institutions and Services: General and K12 - Contract Law
Creator: Ostroy, Joseph M. and Potter, Simon M. Series: Finance, fluctuations, and development Abstract:
We formulate a representative consumer model of intertemporal resource reallocation in which fluctuations in equity prices contribute to the smoothing of consumption flows. Features of the model include (a) an incompletely observable stochastic process of productivity shocks leading to fluctuating confidence of beliefs and (b) technologies involving commitments of a resource good. These features are exploited to show that (1) equities are not a representative form of total wealth and (2) the valuation of currently active firms is not representative of the valuation of all firms. We examine the implications of (1) and (2) to argue that empirical findings for the volatility and 'value shortfall' of equity prices may be consistent with a frictionless representative consumer model having a low degree of risk-aversion. Simulation of a calibrated version of the model for a risk-neutral consumer shows that when the 'data' is analyzed according to current econometric procedures, it is found to exhibit volatility of the same order of magnitude as that found in the actual data, although the model contains no excess volatility.
Parola chiave: Technological commitments, Equity premium, Uncertainty of beliefs, Excess volatility, and Value shortfall Soggetto: G12 - General financial markets - Asset pricing ; Trading volume ; Bond interest rates, E44 - Money and interest rates - Financial markets and the macroeconomy, G14 - General financial markets - Information and market efficiency ; Event studies, and E13 - General aggregative models - Neoclassical
Creator: Boot, Arnoud W. A. (Willem Alexander), 1960-, Greenbaum, Stuart I., and Thakor, Anjan V. Series: Monetary theory and financial intermediation Abstract:
We explain why contracting parties may choose ambiguous financial contracts. Introducing ambiguity may be optimal, even when unambiguous contracts can be costlessly written. We show that an ambiguous contract has two advantages. First, it permits the guarantor to sacrifice reputational capital in order to preserve financial capital as well as information reusability in states where such tradeoff is optimal. Second, it fosters the development of reputation. This theory is then used to explain ambiguity in mutual fund contracts, bank loan commitments, bank holding company relationships, the investment banker's "highly confident" letter, non-recourse debt contracts in project financing, and other financial contracts.
Soggetto: G20 - Financial Institutions and Services: General, K12 - Contract Law, and D86 - Information, knowledge, and uncertainty - Economics of contract : Theory
Creator: Roberds, William Series: Business analysis committee meeting Abstract:
One of the more significant developments in econometric modeling over the past decade has been the invention of the forecasting technique known as Bayesian vector autoregression (BVAR). This paper provides a detailed description of the process of specifying a BVAR model of quarterly time series on the U.S. macroeconomy. The postsample forecasting performance of the model is evaluated at an informal level by comparing the model's performance to certain naive forecasting methods, and is evaluated at a formal level by means of efficiency tests. Although the null hypothesis of efficiency is rejected for the model's forecasts, the accuracy of the model exceeds that of naive forecasting methods, and seems comparable to that of commercial forecasting firms for early quarter forecasts.
Parola chiave: BVAR, Vector autoregression, and Bayesian analysis Soggetto: C11 - Bayesian Analysis: General and C53 - Forecasting Models; Simulation Methods
Creator: Todd, Richard M. Series: Working paper (Federal Reserve Bank of Minneapolis. Research Department) Number: 355 Abstract:
Forecasts are routinely revised, and these revisions are often the subject of informal analysis and discussion. This paper argues 1) that forecast revisions are analyzed because they help forecasters and forecast users to evaluate forecasts and forecasting procedures, and 2) that these analyses can be sharpened by using the forecasting model to systematically express its forecast revision as the sum of components identified with specific data revisions and forecast errors. An algorithm for this purpose is explained and illustrated.
Parola chiave: Forecast revisions, Innovation, Forecasting, and Data revisions Soggetto: E17 - General Aggregative Models: Forecasting and Simulation: Models and Applications
Creator: Adam, Klaus, Marcet, Albert, and Nicolini, Juan Pablo Series: Working paper (Federal Reserve Bank of Minneapolis. Research Department) Number: 720 Abstract:
Consumption-based asset pricing models with time-separable preferences can generate realistic amounts of stock price volatility if one allows for small deviations from rational expectations. We consider rational investors who entertain subjective prior beliefs about price behavior that are not equal but close to rational expectations. Optimal behavior then dictates that investors learn about price behavior from past price observations. We show that this imparts momentum and mean reversion into the equilibrium behavior of the price-dividend ratio, similar to what can be observed in the data. When estimating the model on U.S. stock price data using the method of simulated moments, we find that it can quantitatively account for the observed volatility of returns, the volatility and persistence of the price-dividend ratio, and the predictability of long-horizon returns. For reasonable degrees of risk aversion, the model generates up to one-half of the equity premium observed in the data. It also passes a formal statistical test for the overall goodness of fit, provided one excludes the equity premium from the set of moments to be matched.
Parola chiave: Asset pricing, Learning, Internal rationality, and Subjective beliefs Soggetto: G12 - Asset Pricing; Trading Volume; Bond Interest Rates and E44 - Financial Markets and the Macroeconomy
Creator: Lepetyuk, Vadym and Stoltenberg, Christian Series: Working paper (Federal Reserve Bank of Minneapolis. Research Department) Number: 705 Abstract:
The rise in within-group consumption inequality in response to the increase in within-group income inequality over the last three decades in the U.S. is puzzling to expected-utility-based incomplete market models. The two-sided lack of commitment models exhibit too little consumption inequality while the standard incomplete markets models tend to predict too much consumption inequality. We show that a model with two-sided lack of commitment and chance attitudes, as emphasized by prospect theory, can explain the relationship and can avoid the systematic bias of the expected utility models. The chance attitudes, such as optimism and pessimism, imply that the households attribute a higher weight to high and low outcomes compared to their objective probabilities. For realistic values of risk aversion and of chance attitudes, the incentives for households to share the idiosyncratic risk decrease. The latter effect endogenously amplifies the increase in consumption inequality relative to the expected utility model, thereby improving the fit to the data.
Parola chiave: Risk sharing, Consumption inequality, Prospect theory, and Limited enforcement Soggetto: D52 - Incomplete Markets, D31 - Personal Income, Wealth, and Their Distributions, and E21 - Macroeconomics: Consumption; Saving; Wealth
Creator: Bullard, James and Duffy, John, 1964- Series: Joint committee on business and financial analysis Abstract:
Trend-cycle decomposition has been problematic in equilibrium business cycle research. Many models are fundamentally based on the concept of balanced growth, and so have clear predictions concerning the nature of the multivariate trend that should exist in the data if the model is correct. But the multivariate trend that is removed from the data in this literature is not the same one that is predicted by the model. This is understandable, because unexpected changes in trends are difficult to model under a rational expectations assumption. A learning assumption is more appropriate here. We include learning in a standard equilibrium business cycle model with explicit growth. We ask how the economy might react to the important trend-changing events of the postwar era in industrialized economies, such as the productivity slowdown, increased labor force participation by women, and the "new economy" of the 1990s. This tells us what the model says about the trend that should be taken out of the data before the business cycle analysis begins. Thus we use learning to address the trend-cycle decomposition problem that plagues equilibrium business cycle research. We argue that a model-consistent approach, such as the one we suggest here, is necessary if the goal is to obtain an accurate assessment of an equilibrium business cycle model.
Parola chiave: Learning, Productivity slowdown, New economy, Equilibrium business cycle theory, and Business cycle fluctuations Soggetto: E30 - Prices, business fluctuations, and cycles - General and E20 - Macroeconomics : Consumption, saving, production, employment, and investment - General