A tenure track position I'm applying to (Netherlands) asks for a "motivation letter" in addition to the research statement. It doesn't give any details about what it should contain. Therefore my question is in general, what kind of information should one include in a motivation letter (for a tenure track professor position), and what kind of page length should one aim for?
One thing I can think of is to talk about my current employment and why this job would be better for me. Perhaps the purpose is to convince them that, if I was actually offered the position, that I would indeed accept it?