We develop a principal/agent model for matching agents in two-sided assignments. A principal has preferences over all agents' assignments, and agents have privately-known preferences about their own match (but are indifferent about others'). Unhappy agents can quit, but the principal can stop...

I develop a framework to study common situations, in which substitute goods are sold in separate, good-specific multi-unit (pay-as-bid) auctions. I characterize bidding behavior and investigate auction design features that could increase revenues. The setting I develop gives rise to an...

Faster trading improves liquidity in periodic call auction markets, in contrast to continuous-timemarkets. We build a model where high-frequency traders (HFTs) engage in duels to trade onstale quotes. More frequent periodic auctions increase the likelihood that a single HFT arrives inany given...