Metaphor of tadpoles applicable to Silicon Valley

Interesting theory regarding the nagging conundrum: "Why other countries have difficulties to copy Silicon Valley?" Frogs lay 20,000 eggs but only a few survive to evolve into adult frogs to enjoy mosquito dinners. In the same token, only 1% of startups become viable companies and less than 0.1% become the so-called unicorns. Only in Silicon Valley does it have the chance and will to fall over each other in this massive battlefield. If the population of startups is statistically significant, it is always true that a few will emerge with flying colors.   http://www.newsweek.com/silicon-valley-failing-succeeding-367179