Abstract
Determination of business scope would be essential elements in enterprise business models. How business scope should be determined depending on the business environment, regarded as core business or diversified business areas or processes, regarded as specialization among developed companies and developing companies? In this paper I will present theory on "time series analysis of business models" using the pattern of international specialization based in international economics, especially describing out the patterns of vertically integrated business model between core business and diversified business as the backward linkage industries of core business. And I will present examples of vertically integrated business model between electronic appliances and integrated circuits and discrete semiconductor devices as the backward linkage industries fits to the theory on "time series analysis of business models". Theory of time series analysis will contribute to the theoretical basis for the research of business models.