Dear all,
in my panel data set (unbalanced) I have a variable called "RD spendings". I have those data for the years 2001-2009 (sometimes less years) for 200 companies each year. Now I need to predict/forecast the missing data for 1999 and 2000. I think that -interpolate- is not possible. Looking at the trend between 2001 and 2009, I can tell that the spendings are rising most of the times.
Can somebody give me a suggestion what would be the best solution with Stata?
Thank you
Lisa
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