Dropping observations with a specific value but only for one year and specific country

[Ahmed Farhod]

Hello everyone,

I have panel data that include firm-years observations for many countries. I want to drop only observations that don't have a market return of -2556.27 but only if the country is "BR" and the year is "2009".

I tries this code but it drops all of the observations in BR and 2009:
drop if (year==2009 & CTRY=="BR" & markRET!=-2556.27)

Thanks in advance

[Rich Goldstein]

sounds like a precision problem to me - whatever the situation for your variable markRET, it is apparently never exactly equal to -2556.27; see

help precision

[Ahmed Farhod]

Many thanks Rich, you are right, it turned is a precision problem. I have solved it by rounding the variable.