0003-2573 0003-2573 S0003-25732021000400828 10.31447/as00032573.2021241.12 Portugal 30 12 2021 30 12 2021 241 828 832 2004 2012 12 2/3 2/3 252-78 2017 2018 1990 OCDE 1965 2015 2019 2012 27-58 2012