“…These early studies were empirical and descriptive in nature and often took the form of taxonomies. Prominent Public Law scholars from this era include: Edward S. Corwin (see, e.g., Corwin, 1929), Robert E. Cushman (see, e.g., Cushman, 1924), Charles G. Haines (see, e.g., Haines, 1922), and Thomas R. Powell (see, e.g., Powell, 1918) (see Danelski, 1968;Whittington et al, 2008b).…”