Is Tulane a Tier 1 (highest level) research school?

Is Tulane a Tier 1 (highest level) research school?

Yes.

See here: https://en.wikipedia.org/wiki/List_of_research_universities_in_the_United_States

Tulane is also one of only 60 AAU schools. The AAU is composed of the largest research universities in the country. It is by invitation only. Tulane has been a member since the 1950’s.

I would probably stick to the @x22011 list.