Network Neutrality and Provider Investment Incentives

Just returned from the Bay Area Algorithmic Game Theory Symposium, with some nice talks; in particular, Jean Walrand gave a really nice presentation of a simple model to investigate provider incentives in the network neutrality debate. I thought his presentation was a good example of why simple mathematical models can be useful: if you ask the right questions, then the insight delivered makes the abstractions worthwhile. His paper can be found here.