1870-2171
1870-2171
S1870-21712020000200139
10.29201/pe-ipn.v16i31.266
Mexico
Mexico
Mexico
00
12
2020
00
12
2020
16
31
139
156
[
1991
59
3
3
817-58
]
[
1992
60
4
4
953-66
]
[
2003
36
1
1
126-36
]
[
2008
40
2
2
161-73
]
[
1978
5
2
2
181-9
]
[
1998
45
1
1
115-35
]
[
1999
31
4
4
525-30
]
[
1981
49
4
4
1057-72
]
[
1987
55
2
2
251-76
]
[
1988
12
2-3
2-3
231-54
]
[
1991
59
6
6
1551-80
]
[
1991
5
1
1
105-16
]
[
1992
54
1-3
1-3
159-78
]
[
1994
]
[
1992
74
4
4
678-88
]
[
1977
4
1
1
49-53
]
[
1987
55
3
3
703-8
]
[
2002
9
11
11
731-5
]
[
1990
57
1
1
99-125
]
[
1986
53
4
4
473-95
]
[
1988
75
2
2
335-46
]
[
1990
58
1
1
165-93
]
[
2011
7
2
2
55-71
]
[
1998
5
7
7
423-8
]
[
1998
30
8
8
1055-65
]
[
2001
8
4
4
279-83
]
[
2005
43
4
4
472-88
]
[
1993
61
4
4
783-820
]
[
1981
9
1
1
121-30
]
[
2012
12
3
3
515
]
[
World Bank
1987
]