When I read about the situation at ProRail last week, I was shocked. How can it come as a surprise that a large part of your key employees is retiring? This is not something that just happens suddenly, this happens because your workforce is aging. Apparently, the unions did see the problem coming. ProRail itself lacked a strategy focused on...

How many social media connections do you have? The British anthropologist dr. Robin Dunbar calculates the average social group size, based on the size of the neocortex (a part of your brain ;)). Dunbar used the correlation observed for non-human primates to predict a social group size for humans. As a result of his study, Dunbar predicted a human "mean group...