I recently obtained my exam results at university and while looking at the score distribution I noticed a peculiar remark.
They state that the distribution is obtained using data from the last 5 years, but where the past years are weighted degressively by a factor 0,8.
After looking on the net (and finding for example What is the most scientific way to assign weights to historical data?) I don't really understand why one would apply exponential smoothing in this case. Is there some obvious reason to put more emphasis on the current year that I am missing?