<p>Harvard is single choice early action, which means that there is no binding contract except the agreement that you do not apply to any other institution early. If you research Wharton, you may find you like it better. If you do not and still prefer Harvard, then you can apply to Harvard early and Wharton regular decision. Students in the US usually apply to six or seven schools at varying levels of competition (reaches, matches, and safeties), and some of those students apply to one or more schools early (under early action, single choice early action, or early decision plans). For business, I will also suggest the University of Michigan, which is easier to get into but offers a very competitive program where you can gain a spot into their graduate business program as a freshman applicant, as long as you keep your grades high. Since it is a state school, you can apply to both Michigan and Harvard early, if you decide to do so.</p>