[GAIUS libro nono ad edictum prouinciale. ] §13.4.3.prIdeo in arbitrium iudicis refertur haec actio, quia scimus, quam uaria sint pretia rerum per singulas ciuitates regionesque, maxime uini olei frumenti: pecuniarum quoque licet uideatur una et eadem potestas ubique esse, tamen aliis locis facilius et leuibus usuris inueniuntur, aliis difficilius et grauibus usuris.
[GAIUS from the ninth book on the provincial edict.] This action is referred to the discretion of the judge for this reason, because we know how variable are the prices of things throughout individual cities and regions, especially of wine, oil, and grain; although the power of money also may seem to be one and the same everywhere, yet in some places it is found more easily and at low interest, in others with more difficulty and at high interest.