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Avoiding biased versions of Wooldridge’s simple solution to the initial conditions problem

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  • Rabe-Hesketh, Sophia
  • Skrondal, Anders

Abstract

Wooldridge (2005) provided a simple and elegant solution to the initial conditions problem for dynamic nonlinear unobserved-effects models. His original auxiliary model includes the time-varying explanatory variables at each period. Unfortunately, a popular constrained version that includes within-means of the explanatory variables can be severely biased. We show that there are several ways to avoid this problem.

Suggested Citation

  • Rabe-Hesketh, Sophia & Skrondal, Anders, 2013. "Avoiding biased versions of Wooldridge’s simple solution to the initial conditions problem," Economics Letters, Elsevier, vol. 120(2), pages 346-349.
  • Handle: RePEc:eee:ecolet:v:120:y:2013:i:2:p:346-349
    DOI: 10.1016/j.econlet.2013.05.009
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    References listed on IDEAS

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    1. Konstantinos Drakos & Panagiotis Th. Konstantinou, 2013. "Investment decisions in manufacturing: assessing the effects of real oil prices and their uncertainty," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 28(1), pages 151-165, January.
    2. Pierre‐Carl Michaud & Konstantinos Tatsiramos, 2011. "Fertility and female employment dynamics in Europe: the effect of using alternative econometric modeling assumptions," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 26(4), pages 641-668, June.
    3. Gabriella Conti & Stephen Pudney, 2011. "Survey Design and the Analysis of Satisfaction," The Review of Economics and Statistics, MIT Press, vol. 93(3), pages 1087-1093, August.
    4. Jeffrey M. Wooldridge, 2005. "Simple solutions to the initial conditions problem in dynamic, nonlinear panel data models with unobserved heterogeneity," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 20(1), pages 39-54.
    5. Wiji Arulampalam & Mark B. Stewart, 2009. "Simplified Implementation of the Heckman Estimator of the Dynamic Probit Model and a Comparison with Alternative Estimators," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 71(5), pages 659-681, October.
    6. Rabe-Hesketh, Sophia & Skrondal, Anders & Pickles, Andrew, 2005. "Maximum likelihood estimation of limited and discrete dependent variable models with nested random effects," Journal of Econometrics, Elsevier, vol. 128(2), pages 301-323, October.
    7. Alpaslan Akay, 2012. "Finite‐sample comparison of alternative methods for estimating dynamic panel data models," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 27(7), pages 1189-1204, November.
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    More about this item

    Keywords

    Dynamic model; Initial conditions; Panel data; Unbalanced panels;

    JEL classification:

    • C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data; Spatio-temporal Models
    • C25 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Discrete Regression and Qualitative Choice Models; Discrete Regressors; Proportions; Probabilities

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