The assumption that socioeconomic backgrounds are systematically related to preference judgments has been enhanced since the mid- 1970s (Burkart and Medlik 1981:53; Cohen and Taylor 1976:115-
116; Etzel and Wahlers 1984:3; Mathieson and Wall 1982: 17; Matley 1976:l; Wahab 1975:lO). On this basis, the influence of socioeconomic constraints on a decision of where to go is quite obvious. Therefore, it is necessary to do two things: one, isolate various socioeconomic variables; two, check the hypothesis supporting the idea that differentiation in tourist spatial behavior is socioeconomically generated or influenced. This approach was disputed by Timmermans (1984a:212). In his review of developments in spatial-choice modeling, Timmermans contended that recent studies showed the opposite to be the case: that whenever socioeconomic groups had been defined a priori, no systematic differentiation in choice behavior was found.