http://library.fes.de/pdf-files/dialog/13464.pdf
https://www.veblen-institute.org/IMG/pdf/rapport_pub_et_conso_synthese.pdf
https://www.cesifo-group.de/DocDL/ifoDD_18-01_03-09_Ochsner.pdf
https://www.socialeurope.eu/wp-content/uploads/2020/04/socialtrust.pdf