<p>In my opinion, no matter where and when they won the Nobel, it still counts. If they were at Caltech before the research that won it, I like to think Caltech contributed on their path. If they were at Caltech during OR AFTER the research then that means Caltech has a nobel-winning mind teaching it’s students. The building the research was done in doesn’t deserve any of the credit, so unless you want to make arguments about students who might have contributed towards the professors work, in my opinion, every school the laureate is at from the time they did their research on has equal claim to the prestige of having a Nobel laureate on their faculty.</p>