. Author manuscript; available in PMC: 2018 Nov 12.
Published in final edited form as: Soc Sci (Basel). 2017 Sep 9;6(3):108. doi: 10.3390/socsci6030108
Submitted for possible open access publication under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).