I want to calculate the standard deviation for a specific year group i.e.-
| year | variable | SD_variable |
| 1990 | 1 | a |
| 1991 | 2 | a |
| 1992 | 3 | a |
| 1993 | 4 | b |
| 1994 | 5 | b |
| 1995 | 6 | b |
There's countrycode also which implies I need to use egen
> bysort countrycode: egen SD_variable= sd(variable)
But the above command calculate SD from 1990-95
Where I want to calculate the same for a specific periods- 1990-92 & 1993-95
Can you please help?
0 Response to egen for specific time period
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