Capital gains vs. wealth taxes
Standard optimal capital tax theory abstracts from modeling asset prices, making it unsuitable for thinking about capital gains and wealth taxation. We study optimal redistributive taxation in an environment with asset price movements, adopting the modern finance view that asset prices fluctuate not only because of changing cash flows, but also due to other factors […] The post Capital gains vs.…
The conventional wisdom in capital tax theory, as outlined in the abstract of Standard optimal capital tax theory, disregards the impact of asset price movements. This leaves the subject of capital gains and wealth taxation unaddressed. The study in question, however, delves into optimal redistributive taxation within an environment where asset prices can fluctuate for various reasons, not just shifting cash flows. These reasons are referred to as "discount rates" in modern finance literature.
The research concludes that a mix of realization-based capital gains taxes and cash flow taxes offers an optimal solution for wealth allocation. This is true regardless of the reason behind asset price fluctuations. Additionally, the capital gains tax effectively steers clear of distortions in portfolio decisions, a risk often referred to as the "lock-in effect." This is achieved by focusing on total net trades, rather than gains from selling individual assets.
This approach contrasts with the traditional Haig-Simons comprehensive income tax concept, as well as recent proposals suggesting wealth or accrual-based capital gains taxes. The research also highlights that wealth taxes fall short in comparison to this alternative. The findings are based on a paper published in Econometrica by economists Mark Aguiar, Benjamin Moll, and Florian Scheuer.
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