Why does Lawrence have such a low 4-year grad rate?

<p>Most of the colleges in the same league seem to have a 4-year grad rate of at least 70%, but Lawrence is 59% (2010). Anybody know why? I notice Oberlin's grad rate is also low--even lower, in fact--so I wondered if this has something to do with the music conservatory?</p>

<p>Five-year combo BA/BMusic degree is popular.</p>

<p>Thanks! I thought it was something like this, but wanted to make sure.</p>

<p>That’s a relief for me also, I had wondered why it was so low!</p>