2
Published 2012
Corporación de Investigación, Estudio y Desarrollo de la Seguridad Social 

4
Published 2018
OECD Publishing

7
Published 2015
OECD Publishing

8
Published 2018
OECD Publishing

10
by Huysentruyt, Marieke
Published 2014
OECD Publishing

11
by Castañeda, Ernesto
Published 2021
MDPI - Multidisciplinary Digital Publishing Institute

12
Published 2019
OECD Publishing

15
by Batra, Kavita
Published 2022
MDPI - Multidisciplinary Digital Publishing Institute

16
by Chen, Jie
Published 2022
MDPI - Multidisciplinary Digital Publishing Institute

17
by Mwanri, Lillian
Published 2022
MDPI - Multidisciplinary Digital Publishing Institute

19
Published 2019
OECD Publishing

20
Published 2021
OECD Publishing