It is important to evaluate the performance of objects mathematically 
from various aspects, and to reflect the result on decision making of 
marketing. These aspects should influence consumers' lifestyle as 
economies that indicate characters of social structure. Economies of 
network is defined that an economic activities of some agents 
influences those of others, so called network externality. To put it 
another way, economies of network are those of scale of consumers. 
In this article, we propose a benchmarking method based on two ratios 
LP and PCA focusing on measuring complementary network externality.