We propose a simple axiomatic system that any depreciation and amortization method - complying with the recent developments in the guidelines set by GAAP and IASB - must obey. The system is consistent with both the matching and the impairment principles. We show that none of the prevalent...

The paper analyzes the case of tax planning that tilts the government gain/loss ratio below one, and provides a proof of a certain type of inefficiency caused by tax planning. As the paper shows, the tax imbalance distorts the firm's output level, providing the firm with an incentive to produce...