- I. The empirical model
- II. Data sample and profit definitions
- III. Empirical results
- A. Specification test
- B. Test of log structure
- C. Regression results of the empirical model
- IV. Firm-specific versus industry-specific effects explaining firm profit differences
- A. Results on the firm versus singel-industry effects analysis
- B. Results on the firm versus multiple industry effects analysis
- V. Explanation of permanent profit levels by firm-specific factors
- VI. Concluding remarks
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