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Probabilidad Clásica de Sobreajuste con Criterios de Información: Estimaciones con Series Macroeconómicas Chilenas

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  • Carlos A. Medel

    (Universidad de Nottingham)

Abstract

This paper provides, via Monte Carlo simulations, estimates of the classical probability of overfitting under an autoregressive environment (AR), using the information criteria (IC) of Akaike, Schwarz and Hannan-Quinn (AIC, BIC and HQ), calibrated with Chilean data of total inflation, core inflation, IMACEC, and monthly return of the nominal exchange rate Chilean peso- American dollar. This probability corresponds to the number of times when a candidate model has a strictly greater number of coefficients than the true model, divided by the total number of searches. The results indicate that the increased risk of overfitting is obtained with the AIC, followed by HQ and finally the BIC. The highest probability of overfitting is achieved with the AIC, reaching 32 and 30% with the exchange rate and IMACEC, respectively, followed by 25 and 22% for total and core inflation. Considering the three IC, it is more likely to obtain an overfitted model by just one coefficient. Also, it is more likely that the overfitting does not exceed 10 coefficients. These results are important as quantifying the extent to which these variables are subject to overfitting risk when represented by AR models. The potential problems carried by overfitting includes: (i) the spurious regression, (ii) distor tthe estimation of impulse response function, and (iii) affect the predictive accuracy of the variable of interest. The latter problem is analyzed in detail.

Suggested Citation

  • Carlos A. Medel, 2015. "Probabilidad Clásica de Sobreajuste con Criterios de Información: Estimaciones con Series Macroeconómicas Chilenas," Revista de Analisis Economico – Economic Analysis Review, Universidad Alberto Hurtado/School of Economics and Business, vol. 30(1), pages 57-72, Abril.
  • Handle: RePEc:ila:anaeco:v:30:y:2015:i:1:p:57-72
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    Cited by:

    1. Carlos Medel, 2017. "Forecasting Chilean inflation with the hybrid new keynesian Phillips curve: globalisation, combination, and accuracy," Journal Economía Chilena (The Chilean Economy), Central Bank of Chile, vol. 20(3), pages 004-050, December.
    2. Carlos A. Medel, 2018. "Forecasting Inflation with the Hybrid New Keynesian Phillips Curve: A Compact-Scale Global VAR Approach," International Economic Journal, Taylor & Francis Journals, vol. 32(3), pages 331-371, July.

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    More about this item

    Keywords

    Nonparametric Modelling; Information Criteria; Overfitting; Out-of-sample Analysis;
    All these keywords.

    JEL classification:

    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
    • C51 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Construction and Estimation
    • E23 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Production
    • E27 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Forecasting and Simulation: Models and Applications
    • E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation
    • E37 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Forecasting and Simulation: Models and Applications
    • F31 - International Economics - - International Finance - - - Foreign Exchange

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