[Air-L] firm age typology

Hi all, For my research I would like to use a firm age typology or a similar categorization which defines firms in certain age brackets as startup, young, etc.. So far, I could not find. I'd appreciate you opinions and suggestions, thanks! -- Melike N Findikoglu PhD Candidate University of Illinois at Chicago College of Business Administration Information and Decision Sciences (312) 532 2817 mfindi2@uic.edu http://www.linkedin.com/in/melikefindikoglu