我們考慮連鎖商店有兩個不同的網路效果：地理位置的網絡與不同連鎖品牌之間的效果。在給定的道路結構下，我們去計算不同商店之間的距離，在這些不同的距離下，可以得出每連鎖品牌的單位矩陣，由這個矩陣去判別不同連鎖品牌之間，互相影響的效果與需求。最後我們得出均衡下的利潤與價格，以及討論均衡價格如何被網路效果影響。 / We consider a chain store model involving two levels of networks: the geographic street networks and the chain store networks. We then calculate each shop's geographic distances between other shops, for a given street network. The distances, together with the chain store identity matrix, will determine the cross-shop substitution effects in each shop's demand function. We characterize the equilibrium price, and discuss how the prices are affected by these two networks.