I have five lists of roughly the same 100 universities which vary over the course of five years. Most Uni's are in all five, however, in each list there are differences such as some new Uni's in year 3 or 4 etc, and then some Uni's no longer in the market by year 2,3,4 etc. So each list is slightly different. Some have 110, 97, 105 etc.
I need to link all the applications received to one main list which includes all uni's ever in the market over the five years. How do i get the lists to merge in a way that keeps each "applications recieved" in line with the right institution?
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