hat is one of the takeaways from a new report by the city's chief economist that analyzes trends in San Francisco's gig economy from 2000 to 2014. It is the first time the city has studied the prevalence of its alternative workforce.

Drawing from a mix of census numbers and government labor and economic statistics, it concludes that 29 percent of employees are part of the gig economy — roughly the same percentage as in 2000.

"What we are not seeing yet is that those platforms are leading to more people being part-time employed or self-employed than we have seen for 20 years," said Ted Egan, the city economist who wrote the report.

The one exception is in the transportation industry, but even Uber and Lyft aren't fundamentally changing the job landscape, the report suggests. On the whole, wage employment in San Francisco has grown faster than self-employment.