قوانین استهلاک و تغییر ناپذیری ارزش با شرکت های استخراج معادن

The application of Samuelson's theorem on value invariance to the case of intertemporally optimizing firms is shown to require a judiciously chosen economic depreciation formula which depends on both current stock and current flow variables, in order to prevent the firms from changing their actions in the face of the tax regime. We illustrate by deriving depreciation rules which achieve non-distortingness of actions and value-invariance for resource-extracting firms.