This plot demonstrates a visual technique to quickly identify departments that publish proportionally more "Unrestricted" ETDs than other departments. Please note that only four departments are shown here, and that the data used in this particular plot is from a very limited time period.
During this time period, all Math ETDs and most Architecture ETDs were submitted as "Unrestricted". Computer Science was balanced, and Educational Policy and Leadership ETDs tended toward submissions with time-limited embargoes or other restrictions.