Investors with taxable portfolios sometimes delay the sale of appreciated stock to defer capital gains taxes. While this strategy does help to reduce taxes, it can cause the portfolio to become more concentrated over time, leading to higher overall volatility and lower long-term returns. This...

We study the optimality of taxing capital income according to a Rate-of-Return Allowance proposed by the Mirrlees Review. In a mean-variance framework the optimal tax on risk-free returns is zero with constant returns to scale in private investment, but positive with decreasing returns to scale,...

We study the optimal taxation of risk-free and excess capital income with heterogeneous rates of return, alongside an optimal nonlinear earnings tax. Households can hold three assets: one risk-free, one risky but diversifiable, and one a private investment with idiosyncratic risk whose expected...

Since most countries impose significant levels of taxes on the returns from investments, it is important to understand the nature of the burden that such taxation imposes upon investors. This paper derives and analyzes expressions for the tax-burden imposed on an investor in terms of the loss of...