**Author details**

Ruut Veenhoven1,2\* and Silke Kegel3

1 Erasmus Happiness Economics Research Organization EHERO, Erasmus University Rotterdam, Netherlands

2 Optentia Research Program, North-West University, South Africa

3 Psychology, University of Konstanz, Germany

\*Address all correspondence to: veenhoven@ese.eur.nl

© 2024 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.
