San Jose, capital of Silicon Valley, has a high 91.2% opportunity share, while Atlanta is the lowest in the top 15 with 69. According to the Kaufman Index of Startup Activity 2015 opportunity share measures the percentage of new entrepreneurs not coming out of unemployment during given period of time.
From the another component of Kaufman Index of Startup Activity 2015, Austin, Texas, came out on top in the rate of new entrepreneurs, calculated as the percentage of adults becoming entrepreneurs in a given month.
The Rate of New Entrepreneurs measures the percentage of the adult, non-business-owner population, that starts a business each month. It captures all new business owners … In 2014, an average of 0.31 percent of the adult population, or 310 out of 100,000 adults, created a new business each month. This business-creation rate translates into more than 500,000 adults becoming entrepreneurs in each month during the year. As it can be seen below, during period of time of 1996-2014 about 300 (+/- 30) out of 100,000 adults, created a new business each month.