请教大家,父亲和母亲的教育水平各有四个等级,如何用stata实现这两个变量随机组合下的eduyear?
clear
input float(id eduyear fedu medu)
8 9 2 2
17 6 1 1
31 12 1 1
39 16 3 2
43 9 1 1
44 15 3 2
47 12 1 1
50 16 3 1
54 12 2 1
60 9 1 1
63 9 2 1
67 12 1 1
68 15 4 2
72 15 4 3
73 15 3 3
82 19 3 1
90 9 2 2
114 12 1 1
118 9 2 1
119 6 3 1
end
label values fedu lev
label def lev 1 "elementary school", modify
label def lev 2 "junior middle", modify
label def lev 3 "senior middle", modify
label def lev 4 "undergraduate(more)", modify
label values medu le
label def le 1 "elementary school", modify
label def le 2 "junior middle", modify
label def le 3 "senior middle", modify


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