(with Marc Oliver Rieger and Tõnn Talpsepp) Journal of Empirical Finance, 2018, vol. 45, pp. 59–67. DOI: 10.1016/j.jempfin.2017.09.010 Analyzing a large sample of U.S. firms, we show that the asymmetry of stock return volatility is positively related... 

Finance Research Letters, 2012, vol. 9(3), pp. 167–175. DOI: 10.1016/j.frl.2011.10.003 This paper proposes a novel measure of economic uncertainty based on the frequency of internet searches. The theoretical motivation is offered by findings in economic... 

(with Alexander F. Wagner and Richard J. Zeckhauser) CEOs conducting earnings conference calls display distinctive styles in their word choice. Some CEOs emphasize uncertainty by using qualifying words such as “approximately”, “probably”, and...