World Bank (WB) has played a crucial role in the development of the economies of the world, especially in the emerging countries. We recognize the leadership it has shown and the intellectual authority the WB has on planning offices, practitioners and consultants. For this reason it is very...

We show that project evaluation should be based on free cash flows at nominal prices. We present a case where the results from the constant price method are biased upwards and there is a risk to accept bad projects. It is a widespread practice to evaluate projects at constant prices. With an...