While evaluators such as Charity Navigator use the fraction of donations spent on program expenses versus administrative overhead as an important indicator, Giving What We Can solely focuses on the cost-effectiveness of the charity's work.[1][19] It believes that the variance in cost-effectiveness of charities arises largely due to the variance in the nature of the causes that the charities operate in, and therefore makes evaluations across broad areas of work such as health, education, and emergency aid before comparing specific organizations.[20] In practice, it recommends a selected few charities in the area of global health.