Lately we've been discussing numerous texts at our workplace (a research institute) with a native speaker (British). Those pieces of work are mostly reports, proposals, and scientific papers.
Our teacher/editor claims that the word "collaboration" carries a negative connotation and therefore suggested to not use it. However the term seems - at least to me - to be widely used in scientific context and professional matters.
So the question is whether "collaboration" really sounds negative or not?