Thanks for the link! I had read this before, but it was worth revisiting. I especially like McConnell's distinction between long and short-term debt.
This is basically the kind of thing I'm looking for, but I'd like to see more details. In other words, more analogies between financial and development concepts.
As soon as I have the spare cycles, I'm going to write up a hypothetical project scenario, and explore some of the equations that whakka proposed. I think that a narrative might be easier for me to understand than a formal model.