Haas School of Business
University of California at Berkeley
545 Student services building, #1900
Berkeley, CA 94720
NBER Working Papers and Publications
|February 2018||Social Transmission Bias and Investor Behavior|
with Bing Han, David Hirshleifer: w24281
We offer a new social approach to investment decision making and asset prices. Investors discuss their strategies and convert others to their strategies with a probability that increases in investment returns. The conversion rate is shown to be convex in realized returns. Unconditionally, active strategies (e.g., high variance and skewness) dominate, although investors have no inherent preference over these characteristics. The model has strong predictions for how adoption of active strategies depends on investors' social networks. In contrast with nonsocial approaches, sociability, self-enhancing transmission and other features of the communication process determine the popularity and pricing of active investment strategies.
|January 2010||Limited Capital Market Participation and Human Capital Risk|
with Jonathan Berk: w15709
The non-tradability of human capital is often cited for the failure of traditional asset pricing theory to explain agents' portfolio holdings. In this paper we argue that the opposite might be true --- traditional models might not be able to explain agent portfolio holdings because they do not explicitly account for the fact that human capital does trade (in the form of labor contracts). We derive wages endogenously as part of a dynamic equilibrium in a production economy. Risk is shared in labor markets because firms write bilateral labor contracts that insure workers, allowing agents to achieve a Pareto optimal allocation even when the span of asset markets is restricted to just stocks and bonds. Capital markets facilitate this risk sharing because it is there that firms offload t...
Published: Jonathan B. Berk & Johan Walden, 2013. "Limited Capital Market Participation and Human Capital Risk," Review of Asset Pricing Studies, vol 3(1), pages 1-37.