About the Authors

Nicola Dimitri


Affiliation Department of Political Economy and Statistics, University of Siena, Siena, Italy

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

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