Business concerns, organizations, or individuals that control each other or that are controlled by a third party. Control may include shared management or ownership; common use of facilities, equipment, and employees; or family interest. The calculation of a firm's size includes the employees or receipts of all affiliates. Affiliation with another business concern is based on the power to control, whether exercised or not. Such factors as common ownership, common management and identity of interest (often found in members of the same family), among others, are indicators of affiliation. Power to control exists when a party or parties have 50 percent or more ownership. It may also exist with considerably less than 50 percent ownership by contractual arrangement or when one or more parties own a large share compared to other parties. The affiliated business concerns need not be in the same line of business.