. xtset  Stckd_new  Year_new
       panel variable:  Stckd_new (unbalanced)
        time variable:  Year_new, 1 to 6, but with gaps
                delta:  1 unit

. xi:xtreg  Invest FDMonetary FD Monetary State Cashflow Tobinq Size Lever ROA i.year,fe
variable year not found
r(111);

. xi:xtreg  Invest FDMonetary FD Monetary State Cashflow Tobinq Size Lever ROA i.Year_new,fe
unknown egen function group()