In the 1980s, Robert Ronstadt of Babson College conducted a 12-year study into the subsequent careers of the graduates of the school’s MBA program in entrepreneurship. post 
The most successful graduates were those who created multiple ventures and lengthened the duration of their entrepreneurial careers by using what Ronstadt calls the “Corridor Principle.”
> The Corridor Principle states that the mere act of starting a venture enables entrepreneurs to see other venture opportunities they could neither see nor take advantage of until they had started their initial venture. pdf