Before revision:  Furthermore, we show that fluctuations of the growth rate for new industries URLanize into a power law distribution over relatively short time scales . Our results provide the first strong evidence of statistical mechanical universality in economic systems, and can be used as an empirical test for theories of microeconomic growth .
After revision:  Furthermore, we show that fluctuations of the growth rate for new industries URLanize into a power law distribution over relatively short time scales .