1. The “second” spatial dimension, i.e. the angle of the vector corresponding to the goods’ location and the arbitrarily fixed abscissa, is neglected in this study—as in many others, cf. for instance Stahl (1982).
2. It should be noted that Hicks’ composite commodity theorem virtually refers to market goods. If wages and the individual’s stock of human capital are assumed to be constant within a period, Hicks’ concept can, however, be transferred to commodities in the sense of the new consumer theory.
3. Machina (1985) e.g. states that the “preponderance of evidence” suggests that individual choice is indeed stochastic. Cf. Machina (1985, p. 576).
4. Cf. Luce (1959) or Luce and Suppes (1965).
5. For tests of individual rationality cf. McFadden and Richter (1990), who consider the individuals’ choice among varying subsets of a finite choice set, as well as Daly and Zachary (1979), Williams (1977), Börsch-Supan (1990), or Koning and Ridder (1994), who focus at rationahty tests for fixed choice sets.