0120-6346 0120-6346 S0120-63462018000400147 10.22395/seec.v21n49a6 Colombia Colombia 00 12 2018 00 12 2018 21 49 147 169

2009 4407 47 2008 4606 38 2006 58 3 3 450-74 2011 14 57-71 Banco Mundial 2007 a 12 Banco Mundial 2007 b 9 Banco Mundial 2011 72 2012 36 1 1 143-51 2009 44 2 2 536-63 2010 70 106-13 2000 179-223 2003 15 2002 46 1 1 13-28 2004 56 563-95 2005 a 1 2005 b 2 2010 11 4 4 515-30 2009 2009 Los Ángeles, CA 23-5 2006 123 123 60 2012 7 2 2 14-24 2004 10 4 4 437-57 2009 18 1 1 12-52 2017 50 361-413 2010 38 4 4 647-63 2009 2011 385 385 25 2011 55 71 2007 4 4 119-45 2000 78-158 2000 9-77 2003 3 4 4 396-416 2010 12 4 4 431-55 2006 36 1999 2011 95 2 2 186-200 2000 1-8 1996 2011 5 1 1 58-67 USAID -United States Agency for International Development - 2001