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Generating innovations in economic variables

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  • Vitor Leone
  • Lawrence Leger

Abstract

Stock prices should respond only to unpredictable components of economic news ('innovations') in efficient markets. While innovations used in empirical investigations of the economic underpinnings of stock market risk should at least satisfy this basic requirement, this may not guarantee satisfactory research results. Three methods of generating innovations are evaluated for a variety of economic variables. First differencing produces unsatisfactory, serially correlated innovations in general. Both ARIMA and Kalman Filter innovations are unpredictable, but in a further evaluation the component scores from Principal Components Analysis are regressed against economic innovations using PcGets. The results are far less noisy when Kalman Filter innovations are used.

Suggested Citation

  • Vitor Leone & Lawrence Leger, 2008. "Generating innovations in economic variables," Applied Financial Economics Letters, Taylor and Francis Journals, vol. 4(6), pages 409-415.
  • Handle: RePEc:taf:apfelt:v:4:y:2008:i:6:p:409-415 DOI: 10.1080/17446540701748965
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    References listed on IDEAS

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    Cited by:

    1. Vitor Leone, 2011. "From Property Companies to Real Estate Investment Trusts: The Impact of Economic and Property Factors on UK Listed Property Returns," Economic Issues Journal Articles, Economic Issues, vol. 16(1), pages 19-36, March.

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    JEL classification:

    • G1 - Financial Economics - - General Financial Markets

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