A unique dataset from NASDAQ OMX Nordic facilitates an in-depth analysis of various trader categories, shedding light on their roles within the trading ecosystem. Our investigation specifically focuses on the effect of algorithmic traders on market quality, compared to the activities of other...

Hirshleifer et al. (2009) document a negative relation between abnormal trading volume in stocks with earnings announcements and the number of “competing” earnings announcements on the same day. They argue that this relation stems from distraction on the part of fundamental investors. We...

A logical strategy to contain the COVID-19 pandemic is to completely isolate everyone for two weeks (the incubation period of the virus). However, such a strategy can have prohibitive economic and social costs and, therefore, will be difficult to implement. At the same time, the current...

In this paper we present a budget-constrained optimal control model aimed at finding the optimal enforcement profile for a street-level, illicit drug crackdown operation. The objective is defined as minimizing the number of dealers dealing at the end of the crackdown operation, using this as a...