WebIntelligence now has direct no inner join mechanism right now. In order to display only rows that are in both data providers you can work with block filters on your measure objects. Try out following (block) filter expression:
Handicap Indicator Is not null
for univ1. By this you will get an left outer join instead of full outer relationship .
If you can add another measure from univ2 which does not change your results, you can filter on this field in the same way and then you will end up with an inner join relation between your two data providers.