我的观察是在类似于中心商业区等地方, McDonald 和 KFC经常成为邻居,市场定位相似,顾客群基本上重合,或许他们的象masquake 说的"After McDonald and KFC open branches in this area,Burger King will also open a branch, 1 month later, within 1 mile away".“After McDonald and Burger King open branches, KFC will open abranch two months later and one mile away,”但是在次一级的商业区或者居民区, 单干的情形较多。