Difference between Undeclared status and "Pre-something" status?

<p>Hi guys!</p>

<p>I have been admitted into UCLA for the upcoming year. I have been admitted with my major as "Undeclared - Social Sciences". However, I have seen some other people who have received admission letters under the name "Pre-Economics" or "Pre-Business Economics". </p>

<p>Will I still be able to major in either of these two courses after my freshman year? Or is preference given to the people who got admitted with a "Pre Economics" status? </p>

<p>Thanks in advance to everyone who replies! (and congrats on being accepted too!)</p>