This work studies a Robust Multi-product Newsvendor Model with Substitution (R-MNMS), where the demand and the substitution rates are stochastic and are subject to cardinality-constrained uncertainty sets. The goal of this work is to determine the optimal order quantities of multiple products to...

This paper studies a multi-product newsvendor problem with customer-driven demand substitution, where each product, once run out of stock, can be proportionally substituted by the others. This problem has been widely studied in the literature, however, due to nonconvexity and intractability,...

This dissertation consists of two essays. In the first essay, I examine the source of momentum in stock returns. The reversal of momentum returns has been interpreted as evidence that momentum results from delayed overreaction to information. I examine momentum and reversals conditional on...

Prior studies have linked long-term reversals to the magnitude of locked-in capital gains, suggesting that reversals are driven by tax effects and not overreaction. We show that locked-in capital gains do not explain the reversals in winners when winner returns are based intangible information...

The well-documented negative relationship between idiosyncratic volatility and stock returns is puzzling if investors are risk-averse. However, under prospect theory, while investors are risk-averse in the domain of gains, they exhibit risk-seeking behavior in the domain of losses. Consistent...

Consistent with the hypothesis that momentum profits are attributable to the cross-sectional dispersion in expected returns, Bulkley and Nawosah (2009) report that momentum is nonexistent in demeaned returns. Motivated by their work, I examine whether absence of momentum in demeaned returns is...

In this dissertation, I study two topics in the context of revenue management. The ¯rst topicinvolves building a mathematical model to analyze the competition between many retailerswho can change the price of their respective products in real time. I develop a game-theoreticmodel for the...