Hi,
I've information about ID's current and previous city of residence. I want to create a new variable (displaced: Yes/No) showing where the ID has relocated or not. Is it possible to calculate this?

I tried the following, but its not gicing the expected results:

Code:
. levelsof before , local(Avals)
1 2 3 4 5 6 7 8 9 10 96

. 
. levelsof now , local(Bvals)
1 2 3 4 5 6 7 8 9 10

. local  before now : list uniq


Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input byte(before now) float id
 2  2   1
10 10   2
 6  6   3
 9  9   4
 6  6   5
 9  9   6
 1  1   7
 4  4   8
 6  4   9
 4  3  10
 9  9  11
 5  5  12
 5  4  13
 4  4  14
 2  2  15
 2  1  16
 4  2  17
 2  2  18
 9  9  19
 8  8  20
 9  9  21
 4  7  22
 2  2  23
10 10  24
 3  3  25
 4  1  26
 2  2  27
 5  5  28
 2  8  29
 5  6  30
 7  7  31
 9  9  32
 9  9  33
 7  7  34
 5  5  35
 8 10  36
 2  2  37
 1  1  38
10 10  39
 9  9  40
 2  2  41
 8  8  42
10  8  43
 2  2  44
 7  8  45
 3  3  46
 8  8  47
 7  7  48
 4  3  49
10 10  50
 2  1  51
 3  2  52
 5  5  53
 7  7  54
 4  4  55
 5  5  56
 4  4  57
 4 10  58
 9  9  59
 4  4  60
 2  2  61
 3  3  62
 3  3  63
 9  9  64
 5  5  65
 7  7  66
 4  3  67
10  4  68
 7  7  69
 3 10  70
 2  2  71
 6  6  72
10 10  73
 8  8  74
 4  8  75
 2  3  76
10  2  77
 9  2  78
10  9  79
 5  5  80
96  8  81
 8  8  82
 2  2  83
 8  8  84
 8  8  85
10  2  86
 6  6  87
 9  9  88
 1  1  89
 3  3  90
 6  6  91
 9  9  92
 4  4  93
 2  2  94
 9  9  95
 2  1  96
10 10  97
 4  3  98
10  2  99
 9  9 100
end
label values before WB17
label def WB17 1 "BUTHA-BUTHE", modify
label def WB17 2 "LERIBE", modify
label def WB17 3 "BEREA", modify
label def WB17 4 "MASERU", modify
label def WB17 5 "MAFETENG", modify
label def WB17 6 "MOHALES HOEK", modify
label def WB17 7 "QUTHING", modify
label def WB17 8 "QACHAS NEK", modify
label def WB17 9 "MOKHOTLONG", modify
label def WB17 10 "THABA-TSEKA", modify
label def WB17 96 "OUTSIDE OF LESOTHO", modify
label values now HH7A
label def HH7A 1 "BOTHA-BOTHE", modify
label def HH7A 2 "LERIBE", modify
label def HH7A 3 "BEREA", modify
label def HH7A 4 "MASERU", modify
label def HH7A 5 "MAFETENG", modify
label def HH7A 6 "MOHALES HOEK", modify
label def HH7A 7 "QUTHING", modify
label def HH7A 8 "QACHAS NEK", modify
label def HH7A 9 "MOKHOTLONG", modify
label def HH7A 10 "THABA-TSEKA", modify