“…Highly restrictive and arbitrary requirements are often imposed so as to reduce the number ofpractitioners coming into the state. This limits mobility ofpractitioners, limits trade, and increases the cost of services (e.g., Boulier, 1980;HEW, 1971;Kleiner, Gay, & Greene, 1982;Perloff, 1980;Pratt, 1980). This is particularly prevalent in the southern and western states, which tend to attract persons wanting to relocate.…”