With the advent of platform economies and the increasing availability of online price comparisons, many empirical markets now select on relative rather than absolute performance. This feature might give rise to the 'winner takes all/most' phenomenon, where tiny initial productivity differences...

The idea that market selection promotes survival and expansion of the 'fittest' producersis a key principle underlying theories of competition. Yet, despite its intuitive appeal, thehypothesis that companies with superior productivity also exhibit higher growth lacks em-pirical support. One...