<p>For graduate school (the only true business programs currently at either school) UCD is ranked in the top 50, UCI is not. For undergraduate UCD has both a BA in economics and a BS in managerial economics. I believe presently UCI offers a BA in business economics. UCI will have an undergraduate business degree (I think starting in 2008) but students accepted into the university prior to the programs inception will not be able to switch into the new business degree program.</p>