The relative importance of business-unit factors in determining performance differences of business-units between firms has been widely documented, and the literature has revealed that industry plays a critical role in affecting business-unit profitability. However,previous research has produced mixed results regarding the corporate effects, which were widely defined as the effects of corporate-level factors on the performance of a business-unit. While it is suggested that the influence of corporations on business units may vary in different industries, little empirical research has been conducted to examine the magnitude and the sources of corporate effects within specific industries.