Erschienen in: LEE, Hongmu, ed., Gianni NICOLINI, ed., Man CHO, ed.. International Comparison of Pension Systems : An Investigation from Consumers’ Viewpoint. 1st edition. Singapore: Springer Nature, 2022, pp. 201-239. ISBN 978-981-19-6445-9. Available under: doi: 10.1007/978-981-19-6446-6_6