Collaborating across differences: Build writing relationships with co-author agreements

I had a conversation with a senior colleague recently about the purpose and value of co-author agreements in collaborative writing projects. He and I talk regularly about research and writing but had not touched on the nature of “agreements” in collaborations. He has built his career in a scientific field where co-authors are the norm, and the majority of his publications included graduate students, postdoctoral fellows, or government agency researchers as collaborators.