How do you decide whether or not to collaborate with an acquaintance? Some time ago I met someone at a conference who was doing research in an area that I was just beginning to delve into. We've had a few (minimal) e-exchanges since, and recently they suggested we "work together on something" - the "something" being the project I'm developing, I think.

I like the idea of working with this person and even sharing authorship on the project I'm starting, but I'm still somewhat new to the research side of academics and - based on the mixed experiences I've had collaborating with people I don't know well - I feel very cautious about jumping into a collaboration with someone whose work I don't know well (they're still a student and don't have much out there yet) - and more importantly, whose work ethic I don't know at all.

Does anyone have an approach to potential collaborations - particularly with people you don't know well - which may help to minimize the possibility of things going awry?
It is good to be wary if you don't have much experience with the person and their basic ethical patterns. On the other hand, collaboration is a good thing generally if people contribute on an equitable (not necessarily equal) basis. 

It depends on how much risk you are willing to take here and how important this particular project is to you. Once you agree, and the other person contributes anything, it will be difficult to back out. If success in this project seems vital to your future, I'd suggest not taking on much risk here. If it is "just another paper among others" then you can afford to take a chance. 

But, I'd suggest that you work out the issue at the beginning of the project and not hope for the best. In particular: Will you be co-authors of the work? Who is the first/primary author of the resulting paper, assuming that is a consideration? Or, will one of you be the author and the other get appropriate acknowledgement? How much effort is each willing to put into the project. If it is a major effort for one party but just a minor (hobby) project for the other, then misunderstandings are possible. Are you willing to do the work yourself if the other party quits? Will you still be OK with co-authorship in that case? 

Think about the worst case. Is that acceptable? But think about the most likely case, given what you do know about the other person. 

Lots of questions on this site arise because participants didn't set up parameters and understandings at the start. The writers are mostly unhappy with the outcome and wonder how to recover. There are usually comments that indicate these things should have been worked out early and it is too late, at the end, for a happy outcome. 

However, I think that most collaborations are more successful and can lead to long term productive relationships. Valuable, but with both upside and downside potential.