中文摘要：

在多产品多制造商的生产-销售系统中，考虑制造商是否开发APP的渠道选择问题，分析了APP丰富度、产品间的可替代程度及产品的品牌效应对生产-销售系统定价策略的影响，构建了生产-销售系统逆需求模型，得到四种渠道选择与定价策略下的子博弈纳什均衡解。结果表明：产品品牌效应的增加有利于提高生产-销售系统总需求与总利润，产品可替代程度的增加会导致企业低价恶性竞争，降低生产-销售系统总利润，APP丰富度的增加可以为企业带来更多收益，挖掘潜在市场需求，APP的开发使得企业与消费者双赢，并且两个制造商均选择开发APP是帕累托最优策略。

英文摘要：

With the rapid development of Internet technology, many manufacturers begin to adopt the dualchannel strategy, such as Benz.Nike and some other enterprises have been gained much benefits by adopting this distribution pattern. But with the introducing of direct channel, some conflict and competition arise between online and offline channels. How to coordinate this situation, make a better integration between online and offline channels bring a new challenge for the scholars and businessmen. APP served as an effective media to connect online and offline channels, and brings many benefits for enterprises; therefore many enterprises begin to consider whether to develop APP and what effects may arise in their production and distribution systems. In addition, two kinds of substitutable products produced by two manufacturers, and one manufacturer＇s product has a stronger brand effect, how the brand effect of a product and the substitutability between two kinds of products influence the performances and the pricing strategies of production and distribution systems are also considered, these make the research more close to actual. Thus, according to media richness theory and spillover Effect theory, richness of APP is added into the demand model, sub-game Nash equilibrium are obtained under four different channel selection and pri- cing strategies by backward induction, by comparing the total profits of production and distribution systems before and after develop APP to decide channel selection strategies, furthermore, analyzing the effect of APP richness, brand effect and the substitutable degree of the products on pricing strategies. The study results can be summarized as follows. Firstly,the channel price, market demand and total profits increase with the brand effect of the product, enterprises should improve brand image to attract more consumers and make much more benefits for themselves; Secondly, with the substitutability of the products increase , the total profits and price of production and distribution syst