Leverage Factor
Effectiveness is hard to estimate. We try.
Value of $1 to the very poor
20 x
Investment factor
1.25-1.75 x
Additional value add because money is invested on development rather than squandered on consumption
This later factor might seem low but realize that if it was 2 or 3 it would be easy for a country to work its way out of poverty by investing in and taxing the output of development projects.
Leverage Factor
30 - 40