. cdsimeq(sp poverty age gender party education_year urban)(poverty sp education_year party gender
> householdsize married)


                        NOW THE FIRST STAGE REGRESSIONS

      Source |       SS           df       MS      Number of obs   =    10,777
-------------+----------------------------------   F(9, 10767)     =         .
       Model |  123096.194         9  13677.3549   Prob > F        =         .
    Residual |           0    10,767           0   R-squared       =    1.0000
-------------+----------------------------------   Adj R-squared   =    1.0000
       Total |  123096.194    10,776  11.4231806   Root MSE        =         0

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outcome = poverty > 0 predicts data perfectly
r(2000); You have requested some statistical calculation and there are
  no observations on which to perform it.  Perhaps you specified   if or in and inadvertently filtered all the data.