2007-3364 2007-3364 S2007-33642015000300597 10.12933/therya-15-313 Mexico 00 00 2015 00 00 2015 6 3 597 608

1983 2003 273-91 2015 61 1-82 2000 1994 22 953-69 2012 2007 2003 34 498-515 1994 2010 201-2013 2009 5 1998 1981 Tercera 2001 41-52 2012 6 31-41 1997 2011 89-109 2012 477-86 2014 48 167-99 1989 16 153-65 2013 29 105-28 INEGI 2011 INEGI 2015 2008 36 249-57 1999 482-96 1991 11 175-83 2010 1 41-68 2008 191 170-83 2007 23 127-39 2010 16-9 2009 291-8 2009 2 53-68 1999 29 43-52 2008 1 21-7 2014 63 1-69 2006 2009 Statistics Package for the Social Sciences 2003 2008 33 345-62 2010 33 212-9