This paper provides cross-country empirical evidence on the productivity of bank transaction taxes (BTTs). Our data set comprises six Latin American countries that have levied BTTs since the late 1980s: Argentina, Brazil, Colombia, Ecuador, Peru and Venezuela. We find that, for a given tax rate,...

Financial markets have undergone a remarkable transformation over the past two decades due to advances in technology. These advances include faster and cheaper computers, greater connectivity among market participants, and perhaps most important of all, more sophisticated trading algorithms. The...

This paper analyzes the joint responses of commodity futures prices and traders' futures positions to changes in the VIX before and after the recent financial crisis. We find that while financial traders accommodate the needs of commercial hedgers in normal times, in times of distress, financial...

We model the strategic provision of advice in environments where a principal's optimal action depends on an unobserved, binary state of interest. Experts receive signals about the state and each recommends an action. The principal and all experts dislike making errors in their decision and...