Almost all researchers have some form of collaborative relationship. The problem for most people is building this collaboration from a loose, unstructured set of activities to something more concrete, permanent, and fruitful.
If you Google “research collaboration”, you’ll get over 19,000,000 hits, which might be a bit daunting for some. One of the best places to start to understand the dynamics of international collaboration is a report by Caroline Wagner and her colleagues from RAND [full report]. Some of the material below is derived from it.
There are an infinite variety of research collaborations. Some examples are:
Each can be appropriate for different people at different times. A key question is to ask yourself what you are trying to achieve through the activity.
The process of building collaboration can take many routes. Some common threads emerge, however, on examination and comparison of many examples:

Each stage generates critical questions for researchers and research managers. Our experience (and that of many others’) is that failure to pay attention to these questions often leads to failure later in the collaboration.