A question about the double majoring

<p>When I double major something... say for ex, linguistics and macro economics...</p>

<p>Do I study both more shallowly than would I do when I major in only one thing?</p>

<p>or do I spend more time and study both of them as deep as I would do if I major in only one of'em?</p>

<p>Do I need to pay more tuition if I have more subjects by double majoring?</p>