نتایج جستجو برای: economic modeling and forecasts

تعداد نتایج: 16930526  

1993
J. Scott Armstrong Fred Collopy

This paper examines a strategy for structuring one type of domain knowledge for use in extrapolation. It does so by representing information about causality and using this domain knowledge to select and combine forecasts. We use five categories to express causal impacts upon trends: growth, decay, supporting, opposing, and regressing. An identification of causal forces aided in the determinatio...

2005
William A. Barnett Unja Chae John Keating

We measure the United States capital stock of money implied by the Divisia monetary aggregate service flow, in a manner consistent with the present-value model of economic capital stock and asset pricing theory. The resulting measures differ substantially from the usual simple sum accounting monetary aggregates. We permit non-martingale expectations and time varying discount rates. Based on Bar...

2006
F. Laio

In the present paper we describe some methods for verifying and evaluating probabilistic forecasts of hydrological variables. We propose an extension to continuous-valued variables of a verification method originated in the meteorological literature for the analysis of binary variables, and based on the use of a suitable cost-loss function to evaluate the quality of the forecasts. We find that ...

2003
Miguel A. Ferreira Jose A. Lopez

We find that covariance matrix forecasts for an international interest rate portfolio generated by a model that incorporates interest-rate level volatility effects perform best with respect to statistical loss functions. However, within a value-at-risk (VaR) framework, the relative performance of the covariance matrix forecasts depends greatly on the VaR distributional assumption. Simple foreca...

2006
Michael P. Clements

We ask whether the di¤erent types of forecasts made by individual survey respondents are mutually consistent, using the SPF survey data. We compare the point forecasts and central tendencies of probability distributions matched by individual respondent, and compare the forecast probabilities of declines in output with the probabilities implied by the probability distributions. When the expected...

Journal: Iranian Economic Review 2003

The quantitative relationship between higher education and economic growth in the tradition of “growth accounting equations” and also “neoclassical production function” approach have occupied a pride of place in economics of education, particularly the literature on more developed countries. However, production function type models that allow for isolating the “indirect” (external) effects of h...

2013
Travis Berge

Four model selection methods are applied to the problem of predicting business cycle turning points: equally-weighted forecasts, Bayesian model averaged forecasts, and two models produced by the machine learning algorithm boosting. The model selection algorithms condition on different economic indicators at different forecast horizons. Models produced by BMA and boosting outperform equally-weig...

2002
Michael P. Clements

Regression-based tests of forecast probabilities of particular events of interest are constructed. The event forecast probabilities are derived from the SPF density forecasts of expected inflation and output growth. Tests of the event probabilities supplement statistically-based assessments of the forecast densities using the probability integral transform approach. The regression-based tests a...

2008
Paul Ormerod

By scientific standards, the accuracy of short-term economic forecasts has been poor, and shows no sign of improving over time. We form a delay matrix of time-series data on the overall rate of growth of the economy, with lags spanning the period over which any regularity of behaviour is postulated by economists to exist. We use methods of random matrix theory to analyse the correlation matrix ...

2017
Daniel Armeanu Jean Vasile Andrei Leonard Lache Mirela Panait

The purpose of this paper is to investigate the application of a generalized dynamic factor model (GDFM) based on dynamic principal components analysis to forecasting short-term economic growth in Romania. We have used a generalized principal components approach to estimate a dynamic model based on a dataset comprising 86 economic and non-economic variables that are linked to economic output. T...

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