About the Authors

Moritz Hetzer

moritz.hetzer@gmail.com

Affiliation Chair of Entrepreneurial Risks, Department of Management, Technology and Economics, Swiss Federal Institute of Technology, Zurich, Switzerland

Didier Sornette

Affiliations Chair of Entrepreneurial Risks, Department of Management, Technology and Economics, Swiss Federal Institute of Technology, Zurich, Switzerland, Swiss Finance Institute, Geneva, Switzerland

Competing Interests

The work has been partially funded by ZKB (Zuercher Kantonal Bank - http://www.zkb.ch). This does not alter the authors′ adherence to all the PLOS ONE policies on sharing data and materials. There are no patents, products in development or marketed products to declare. ZKB had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. The funding by ZKB, which partially supported the submitted work, was a 3-year research grant/PhD-fellowship.

Author Contributions

Conceived and designed the experiments: MH DS. Performed the experiments: MH. Analyzed the data: MH. Contributed reagents/materials/analysis tools: MH. Wrote the paper: MH DS.