Original data Altman used for his z-score formula At our university we are researching the usefulness of failing (bankrupticy) prediction models. We are interested in the original datasets Altman used for his models. Does anyone know where this datasets can be found?
We have the same question for the datasets Ohlson used.
The original paper (of Altman) is

Altman, E. I. (1968). Financial ratios, discriminant analysis and the prediction of corporate bankruptcy. The journal of finance, 23(4), 589-609.

We read (p. 593)


  III. DEVELOPMENT OF THE MODEL 
  
  "Sample Selection. The initial sample is composed of sixty-six
  corporations with thirty-three firms in each of the two groups. The
  bankrupt group (Group 1) are manufacturers that filed a bankruptcy
  petition under Chapter X of the National Bankruptcy Act during the
  period 1946-1965. (...) Recognizing that this group is not completely
  homogeneous, due to industry and size differences, a careful selection
  of non-bankrupt firms was attempted. Group 2 consisted of a paired
  sample of manufacturing firms chosen on a stratified random basis.
  (...) Firms in Group 2 were still in existence in 1966. Also, the data
  collected are from the same years as those compiled for the bankrupt
  firms. For the initial sample test, the data are derived from
  financial statements one reporting period prior to bankruptcy.
  (footnote 18: The data was derived from Moody's Industrial Manuals and
  selected Annual Reports. The average lead time of the financial
  statements was approximately seven and one-half months prior to
  bankruptcy.)


The paper does not contain, even in print form, the actual data sample, so BKay's suggestion to contact the authors is your best shot.