gvkey, fiscal year, sales sales growth 1004 1992 200 - 1004 1993 220 0.1 1004 1994 210 e.t.c 1005 1992 355 1005 1993 400 1006 1992 412 1006 1993 500 1007 1992 1520 1007 1993 1580 1007 1994 2000 1007 1995 1890 1007 1996 1400 i want to create a new varible for each fiscal year calculated the sales growth of each company.
... View more