We resolve Roll's R2 puzzle. Before legislation enacted to prevent such practices, information leakage through selective disclosure could be incorporated into market prices prior to public release of news. I.e., "news days" did not deliver news to the stock market. Now they do. We show changes...

We construct and estimate a dynamic oligopoly model of the Bitcoin mining market. Mining equipment manufacturers produce differentiated durable capital goods and endogenously choose optimal investments in R&D. Miners make dynamic purchase decisions based partly on beliefs regarding...

We exploit a novel natural experiment to establish a clear causal relation between media attention and consumer investment behavior. Our findings indicate a 31 percent local average increase in quarterly capital flows into mutual funds mentioned in a prominent Wall Street Journal “Category...

This work analyzes data on all public US firms in the 50 year period 1970-2019, and presents 18 stylized facts of their scale, income, growth, return, investment, and dynamism. Special attention is given to (i) identifying distributional forms; and (ii) scale effects --- systematic difference...

This paper describes the Difference-of-Log-Normals (DLN) distribution. A companion paper Parham (2023) makes the case that the DLN is a fundamental distribution in nature, and shows how a simple application of the CLT gives rise to the DLN in many disparate phenomena. Here, I characterize its...