Human capital is a key successful factor for a company to increase profit or in business growth from practice experience in the knowledge economic age. However, there are inconsistent results for this argument in empirical studies. The purpose of this paper is to examine these associations after considering business complementarity variable for electronic companies which are listed on TSE and OTC in Taiwan. We find that business complementarity is not only a key determinant of business performance, but also influences the effects of investments in human or asset capitals, or the compensation policy on operating performance for companies.