Fitzpatrick collected information about 20 failed firms and 20 nonfailed firms during the period 1920-1929 and matched failed and nonfailed firms one by one . Fitzpatrick used 13 popular ratios to test the validity of the assumptions , and concluded that financial ratios displayed differences in the performance of failed and nonfailed firms (Levins , 1997 . Another early analysis prediction model is the work of Merwin (1942 . He used financial ratios to analyze data collected from the income tax returns of 200 failed...











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