2631-2786 2631-2786 S2631-27862019000300009 10.35290/rcui.v6n1.2019.67 USA Mexico México 00 04 2019 00 04 2019 6 1 9 22

2004 Berlín, Alemania ONU 2007 1997 41-60 2001 Aalborg 1987 16 87-99 2004 Segunda 2010 2011 2010 2010 163-75 2006 35 1441-9 OCDE-EUROSTAT 2000 ONU 2007 2001 1 2 2 167-81 1988 2005 73 2 2 28-44 2005 2002 343 343 97-109 2005 25 9 9 1059-70 2008 4a 2004 2002 2 4 4