The paper studied on the pricing policy under positive externalities, focusing on the Chinese public utilities products. After analysis, referred to the models of Yang J [1] and Sundararajan [2], they focused on positive externality network products' customizing bundled pricing. What the difference is, they focused on network products, researching on the bundled pricing model under positive externality. This paper, however, is facing public utilities products, and the customized product bundling pricing models under positive externalities are given. In addition, it discusses the optimal-realizable-customized-bundling-pricing contracts for the monopoly companies under the situation of positive externalities existing.

Agriculture, rural and farmers are world-wide issues, and agricultural products have long been a problem for China’s "agriculture, rural and farmers". Because agricultural products show strong positive externality, the formulation of bundled pricing strategy can not only reflect the characteristics of agricultural products, but also in line with the development trend of Chinese agriculture. This paper studies the pricing of product bundles under positive externality- with agricultural products as the object, combined with the pricing of agricultural products, and discusses the situation of custom bundled pricing of agricultural products under positive externality, and provides reference to the custom bundled pricing strategies of agricultural products for rural areas, agriculture and farmers in China.