1990-8644 1990-8644 S1990-86442019000400136 Ecuador 00 12 2019 00 12 2019 15 69 136 140

2012 2012 2009 1994 2016 2004 OECD 2000 2006 2010 1 1 1 10-21 2010 1 2 2 2017 11 2 2 2001 2007 2007 13 1 1 87-90