A Spline Analysis of the Small Firm Effect: Does Size Really Matter?

Joel Horowitz (), Tim Loughran and N. E. Savin
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Tim Loughran: Univ. of Iowa
N. E. Savin: Univ. of Iowa

Econometrics from University Library of Munich, Germany

Abstract: This paper uses average monthly returns and linear spline regressions to investigate the relation between expected return and firm size during 1980-1994. We find that the average monthly returns are approximately constant across size deciles. The estimated spline regressions vary substantially from year-to-year. Our analysis of the year- by-year estimates suggests that the annual regression function is essentially flat, except possibly for the smallest two deciles. The results are similar for the January and non-January months. Hence, the evidence does not support the prevalent use of size as an explanatory variable for returns during the 1980-1994 period.

JEL-codes: C1 C5 C8 (search for similar items in EconPapers)
Pages: 40 pages
Date: 1996-08-15
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