{| class="wikitable" border="1"
|-valign="top"
! Ph.D. Programs by Number of Relevant Faculty
! Ph.D. Programs by Country
! Ph.D. Programs by State
|-valign="top"|<categorytree mode=pages>1 Faculty</categorytree>
<categorytree mode=pages>2 Faculty</categorytree>
<categorytree mode=pages>3 Faculty</categorytree>
<categorytree mode=pages>5 Faculty</categorytree>
<categorytree mode=pages>6+ Faculty</categorytree>
|<categorytree mode=pages>Australasia</categorytree>
<categorytree mode=pages>Canada</categorytree>
<categorytree mode=pages>United Kingdom</categorytree>
<categorytree mode=pages>United States</categorytree>
| row 1, cell 3<categorytree mode=pages>Arizona</categorytree><categorytree mode=pages>California</categorytree><categorytree mode=pages>Florida</categorytree><categorytree mode=pages>Illinois</categorytree><categorytree mode=pages>Indiana</categorytree><categorytree mode=pages>Maryland</categorytree><categorytree mode=pages>Massachusetts</categorytree><categorytree mode=pages>Michigan</categorytree><categorytree mode=pages>Minnesota</categorytree><categorytree mode=pages>New York</categorytree><categorytree mode=pages>North Carolina</categorytree><categorytree mode=pages>Ohio</categorytree><categorytree mode=pages>Pennsylvania</categorytree><categorytree mode=pages>Texas</categorytree><categorytree mode=pages>Utah</categorytree><categorytree mode=pages>Wisconsin</categorytree>
|-
| row 2, cell 1
| row 2, cell 2
| row 2, cell 3
|}
<categorytree mode=pages>1 Faculty</categorytree>
<categorytree mode=pages>2 Faculty</categorytree>
<categorytree mode=pages>3 Faculty</categorytree>
<categorytree mode=pages>4 Faculty</categorytree>
<categorytree mode=pages>5 Faculty</categorytree>
<categorytree mode=pages>6+ Faculty</categorytree>