This paper tests the hypothesis that the introduction of the Accelerated Cost Recovery System in 1981 caused a reduction in stock prices by reducing the value of existing capital. A second hypothesis that these depreciation changes benefited firms by increasing the return from new investment is...

The first section of this paper introduces the topic. The next section shows that many parallel tax systems share common features and constructs a general model of the cost of capital based on the Hall-Jorgenson (1967) cost of capital formula. Section 3 presents conditions under which a parallel...

A change in the tax law that increases investment incentives for new assets may result in excess returns on new investment, causing firm value to increase. Alternatively, because the investment incentives apply only to new investments, the value of existing assets that compete with these...