- clear
- input ID str8 Gender str8 Country Income Timepoint
- 1 Male China 502 20
- 1 Male China 1000 30
- 2 Female USA 800 20
- 2 Female USA 1500 30
- end
- reshape wide Income, i(ID) j(Timepoint)
- ren (Income20 Income30) (Timepoint_20 Timepoint_30)


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