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ARBITRAGE PRICING MODELS: THE SUFFICIENT NUMBER OF FACTORS AND EQUILIBRIUM CONDITIONS
Author(s) -
Ehrhardt Michael C.
Publication year - 1987
Publication title -
journal of financial research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.319
H-Index - 49
eISSN - 1475-6803
pISSN - 0270-2592
DOI - 10.1111/j.1475-6803.1987.tb00483.x
Subject(s) - arbitrage , econometrics , economics , simple (philosophy) , mathematical economics , financial economics , epistemology , philosophy
The typical methodology for estimating an Arbitrage Pricing Model is inadequate with respect to two issues. First, the statistical tests used to determine the sufficient number of factors are inappropriate and may actually overstate the relevant number of factors. Second, the methodology fails to determine whether the estimated model satisfies equilibrium conditions. A simple test that corrects both deficiencies is developed in this paper.