**Author details**

Aida Isabel Tavares1,2\* and Carolina Freitas3

1 ISEG, Lisbon School of Economics and Management - University of Lisbon, Portugal

2 CEISUC, Centre for Health Studies and Research - University of Coimbra, Portugal

3 FEUC, Faculty of Economics - University of Coimbra, Portugal

\*Address all correspondence to: aitavar@gmail.com

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
