Statistical properties and stability of ratings in a subset of US firms

Alexander B. Matthies

No 2013-002, SFB 649 Discussion Papers from Humboldt University Berlin, Collaborative Research Center 649: Economic Risk

Abstract: Standard explanatory variables that determine credit ratings do not achieve significant effects in a sample of 100 US non-financial firms in an ordered probit panel estimation. Sample size and selection as well as the distribution of explanatory variables across rating classes may be the cause this problem. Furthermore, we find evidence to suggest that variable coefficients vary over rating classes when analysed with an unordered loogit model. The sample reproduces well-established macroeconomic effects of credit ratings found by Blume et al. (1998) and highlights the influence of the rating agencies' through-the-cycle approach on rating transitions.

Keywords: rating agency; business cycle; through-the-cycle rating methodology; method comparison (search for similar items in EconPapers)
JEL-codes: G20 G24 G30 G32 (search for similar items in EconPapers)
Date: 2013
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Persistent link: https://EconPapers.repec.org/RePEc:zbw:sfb649:sfb649dp2013-002

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