THE ECONOMIC LAW OF MARKET AREAS: A FURTHER DISCUSSION*
讨论了费特命名的市场区经济法则，通过六种情形分析两个竞争中心之间的领土划分，每种情形由运费和价格差异组合定义，并考察了边界形式与区位意义。
ABSTRACT. The Economic Law of Market Areas, so named by Fetter, is concerned with the division of a territory between two competing centers. It is argued that this Law can be conveniently examined in terms of six cases, each of which is specified by a combination of differentials in freight rates and prices at the two centers. The locational significance of each case is considered, along with the form and dimensions of the market‐area boundary between the two centers. Three of the cases are each shown to subsume a special case. It is further shown that for any case except one, a reversal of the differentials between the two centers, while resulting in a symmetrically‐equivalent outcome, requires a different (and usually substantial) respecification of the case.