<p>What classes as an undergraduate should I take if I want to pursue this field in grad school…also rankings?</p>
<p>it varies by program – go find programs you’d likely be interested in and look up their admissions requirements. same with rankings, google helps.</p>
<p>on that note, i have no idea what industrial organization means.</p>
<p>If you are talking about Industrial Organization in regards to economics, it would be wise to load up on econ and math courses. You would probably go to a grad econ program if this is the area you want to specialize in. Keep in mind that Industrial Organization is only a sub field of econ. You might only take two classes that are specifically aimed toward Industrial Organization theory.</p>