Comparability under this method is less dependent on close physical similarity between the products transferred than under the comparable uncontrolled price method. Substantial differences in the products may, however, indicate significant functional differences between the controlled and uncontrolled taxpayers. Thus, it ordinarily would be expected that the controlled and uncontrolled transactions involve the production of goods within the same product categories. Furthermore, significant differences in the value of the products due, for example, to the value of a trademark, may also affect the reliability of the comparison. Finally, the reliability of profit measures based on gross profit may be adversely affected by factors that have less effect on prices. For example, gross profit may be affected by a variety of other factors, including cost structures (as reflected, for example, in the age of plant and equipment), business experience (such as whether the business is in a start-up phase or is mature), or management efficiency (as indicated, for example, by expanding ...
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