To me, an employee has to have deep knowledge in the field of study itself. This is the most important of course, as one can bluff his or her way through the ladder but will be discovered at the end. So the level of knowledge in own discipline is very important
Secondly, or as the research put it, the person has to have great communication skills. Well, this is true too, but how many employees that I have encountered in my working life have this skill?