Decomposing Taxable Equity Prices
Stiglitz's asset pricing model reflects the value of equity as composed of the value of productive capital and capitalized monopoly rents. He further states in his recent book on inequality regarding a hypothetical decomposed asset value model for ideal taxation, with asset prices being decomposed into risk-free treasury bill rates, market beta, alpha generated by firm's a portfolio manager and monopoly rents (which i think is blurry-lined with the aforementioned alpha generation) and how to avoid taxing risk-free rate portion to prevent market distortions, tax market rates at the same level as corporate taxation, tax the alpha generation as income taxation (instead of CGT) and tax monopoly rents as heavily as possible to correct for monopoly externalities.
What are some caveats of such a model, if hypothetically it was possible to decompose asset prices? If there are any references or responses to this analysis by Stiglitz I would really appreciate it!
I am not sure if this is the right forum to ask a question like this, please redirect if there are better places to ask this.