There are tons of articles out there on the damage caused by rodents, especially to farms and crops, but also to individual homes. And as mentioned in the other post, there are articles that speak to the elevation of rodent populations due to decimation of snake populations. And lets not forget the subsiquent outbreak of disease as natures way of controlling surges in these rodent populations, outbreaks that are often transmittable to humans. I think that may be your best angle for your paper. Another thing to consider, and I'm sure there are papers out there on it, but as the rodent populations increase, so do there other predators, namely coyotes. When the coyotes have an unlimited rodent supply, they get much healthier and in turn their population increases. As they get healthier and more of them seek food, deer become easier prey and hence the deer populations are affected as well. This is just a small narrow view of the wide spread effects on the food web when one vital component is removed.
Hope this helps.