Nej, säger Harvards Ed Glaeser:

That is how innovation works: small companies competing like crazy and trying out new things. Across cities, there is a strong connection between an abundance of small firms and local growth. The last thing that the government should be doing is propping up big declining firms. Real innovations are far more likely to come from someone’s garage, which is where Chester Carlson came up with the Xerox machine during the Great Depression.