This article analyzes the manifold situations in which the efficient-market hypothesis (EMH) has influenced — or has failed to influence — federal securities regulation and state corporate law, and the prospective roles for the EMH in these contexts. In federal securities regulation, the EMH...

Borrowing decisions affect most households, with large stakes and implications for subfields as varied as macroeconomics and industrial organization. I review theoretical and empirical work on household debt: its prevalence, level, growth, and composition, as well as various measures of consumer...

The intersection of research and policy on consumer credit often has a Goldilocks feel. Some researchers and policymakers posit that consumer credit markets produce too much credit. Other researchers and policymakers posit that markets produce too little credit. I review theories and evidence on...

We develop a theoretical model to study the welfare effects of libertarian paternalism on information acquisition, social learning, and financial decision-making. Individuals in our model are permitted to appreciate and use the information content in the default options set by a social planner....

We study the impact of loan-to-value regulation on supply and demand for unregulated debt that is used for home acquisition. In our setting, part of the dwelling price is in the form of pre-existing debt exempt from the regulation. Variations in the latter prior to the LTV regulation generated...

VaR_Delta-Normal fails in two counts: subadditivity and potentially producing losses larger than its portfolio value. This paper solves the second inconsistency developing formulas derived from a put option, named PVaR_Delta-Normal and Put_Expected_Shortfall, PSF_Delta-Normal; the latter also...

The article presents an overview of the assumptions and unintended consequences of the widespread adoption of modern portfolio theory (MPT) in the context of the growth of large institutional investors. We examine the many so-called risk management practices and financial products that have been...

I develop a sequential trading model with ambiguity-averse market makers and provide a theoretical explanation to the historical coincidence of ambiguous events, asset illiquidity, and price variability. My model implies that the bid-ask spread of an asset contains an additive component of...

We augment a simple inventory model with new features of the post-crisis regulations to offer new predictions on the effects of post-crisis regulations on the over-the-counter markets. First, the increased capital requirements of Basel III lead to an overall increase in order rejection rates of...

When households make financial decisions, one may expect them to be both informative and rational – just as any other financial agent. In this paper, we question whether this hypothesis is error-free and correct by using a unique large-scale event study. Our results do not support the axioms...