Hey Peter, now my professor change his criteria on cleansing up those data, instead of keep fully 12-monthly data for every year, he suggested me to keep those years that contain----equal or more than 10-monthly data (i.e. 12-monthly data, 11-monthly data and 10-monthly data), in which the 10 months or 11 months do not need be in sequence, as long as there are 10-monthly or 11-monthly values in a year, then keep that year. The final dataset still will be based on fund ID and Year. Could you kindly give me a hand? I am so stressful. Many thanks.
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