The DuPont model breaks the calculation of return on equity (ROE) into three ratios: Net profit margin (NPM) Asset turnover ratio Equity multiplier If ROE changes over time or diverges from normal ...

A model that scores well for dust removal should perform comparably for pollen. The Dupont ProClear Allergen Merv 13 is part of the Air Filters test program at Consumer Reports. In our lab tests ...