One strength of the transactional net margin method is that net profit indicators (e.g. return on assets, operating income to sales, and possibly other measures of net profit) are less affected by transactional differences than is the case with price, as used in the CUP method. Net profit indicators also may be more tolerant to some functional differences between the controlled and uncontrolled transactions than gross profit margins. Differences in the functions performed between enterprises are often reflected in variations in operating expenses. Consequently, this may lead to a wide range of gross profit margins but still broadly similar levels of net operating profit indicators. In addition, in some countries the lack of clarity in the public data with respect to the classification of expenses in the gross or operating profits may make it difficult to evaluate the comparability of gross margins, while the use of net profit indicators may avoid the problem. (An example illustrating the sensitivity of gross and net profit margin indicators is found in Annex I to Chapter II.) ...

One strength of the transactional net margin method is that net profit indicators (e.g. return on assets, operating income to sales, and possibly other measures of net profit) are less affected by transactional differences than is the case with price, as used in the CUP method. Net profit indicators also may be more tolerant to some functional differences between the controlled and uncontrolled transactions than gross profit margins. Differences in the functions performed between enterprises are often reflected in variations in operating expenses. Consequently, this may lead to a wide range of gross profit margins but still broadly similar levels of net operating profit indicators. In addition, in some countries the lack of clarity in the public data with respect to the classification of expenses in the gross or operating profits may make it difficult to evaluate the comparability of gross margins, while the use of net profit indicators may avoid the problem. (An example illustrating the sensitivity of gross and net profit margin indicators is found in Annex I to Chapter II.) ...