Certifiers have a crucial role in facilitating effective communication in the online and the traditional world. As a way of generating statistically meaningful information, certification has been adopted in financial statements evaluation and more recently in various online communities as well....

This dissertation explores several aspects of the theory in industrial organization.The first chapter builds a model with two cost asymmetric firms who not only have Cournot competition in the spot market but also have the opportunity to trade forward contracts. It is shown that with forward...

This dissertation looks at several issues in designing an optimal skill-basedconsumer contest (SBCC). Consumer product (or service) companies, such asonline entertainment providers, often use SBCCs to promote the consumption oftheir products (or services). The main objective of a SBCC is to...

We solve the problem of optimal securitization for an issuer facing heterogeneous investorswith arbitrary time and risk preferences. We show that the optimal securitizationis characterized by multiple nonlinear tranches, and each investor gets a portfolio of thesetranches. In particular, when...