Well, this isn't quite the whole report - its a pdf of a draft on the subject that was to be presented at the 2006 Annual American Political Science Association Conference held last August:

The American Way of War and Peace in Comparative Perspective
Abstract
Why do states lose to weaker foes in so-called “small” wars? The United States, for example, enjoys a reputation for unmatched tactical proficiency on the battlefield yet has witnessed a post-1945 decline in its ability to secure its political aims in war. Using a new dataset of small wars and insurgencies (1800-2003), we argue the paradox of tactical success but strategic failure has afflicted all states since 1900. While crude indicators of military and economic power are an excellent predictor of war outcomes in the nineteenth century, such variables are no longer tied to political victory after 1900. Indeed, we argue that as states embrace the “modern” way of warfare – typified by mechanized warfare that uses rapid decisive operations (RDO) to strike an adversary’s center of gravity – they become less capable of winning small wars and insurgencies. Two variables serve to lock states onto this suboptimal path: (1) the process of industrialization and the rise of market-based economies and (2) a cultural understanding of modern warfare as appropriate, indeed, required, for civilized states. The paper uses a nested research design that pairs large-N statistical test (including fractal pooling) with a within-case comparison of American operations in Iraq (2003-06).