<p>You should only ED if the school is the one you want to attend. For international students (and lower-income Americans applying to 100% need schools) this would be altered to: if it increases your odds and you like the school enough that won’t won’t regret not going anywhere else, go ahead.
However, be aware that internationals applying ED are often deferred if they need aid, since the amount of money available ought to be spent on the most interesting applicants only.</p>