0123-3769 0123-3769 S0123-37692019000200149 10.19053/01233769.8844 Ecuador 00 12 2019 00 12 2019 24 2 149 170

2001 Banco Mundial 2002 2007 1999 1979 2010 14 0 0 2015 2011 29 39 39 44-57 2013 49 2 2 41-61 2015 2 2 2 194-211 2009 1 1 1 6-20 2017 12 1 1 107-26 2006 2009 35 1 1 5-20 2006 2008 9 8 8 891-914 2010 Buenos Aires, Argentina 2015 Ensenada, Argentina 1997 2002 55-68 2012 66-96 2008 2018