I want to know the answer to the following question:
What year was research completed to demonstrate humans benefited by having dogs hunt with them?
All the background I'm provided with is that "The relationship between the presence of a dog and success in the hunt is often mentioned as a primary reason for the domestication of the wolf, and a 2004 study of hunter groups with and without a dog gives quantitative support to the hypothesis that the benefits of cooperative hunting was an important factor in wolf domestication.". Is that enough to answer the question?