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All content in this area was uploaded by Fredrik Wulfsberg on Jul 23, 2019
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N
i s wist t
(1)
(2)
¯wist
0
100
200
300
400
500
1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979
0
.05
.1
.15
.2
.25
1800
1900
2000
2100
2200
2300
1967 1969 1971 1973 1975 1977 1979
˜wist =
¯wist
¯wt
˜wist
˜wit =X
s∈i
Nist
Nit
˜wist
˜wit
˜wst =X
i∈s
Nist
Nst
˜wist
˜wst
˜wist ˜wit ˜wst
0 2 4 6
Density
.6 .8 1 1.2
0 5 10 15 20
Density
.9 1 1.1 1.2