As Anand said we have a separate workforce. We have a bunch of algorithmic and social elements that we have developed for improving quality. In fact,we have wri

As Anand said we have a separate workforce. We have a bunch of algorithmic and social elements that we have developed for improving quality. In fact,we have written an IEEE paper on how to improve quality in crowdsourcing. http://www.cs.berkeley.edu/~bjoern/papers/kulkarni-mobileworks-ieee2012.pdf http://www.cs.berkeley.edu/~bjoern/papers/kulkarni-mobilewor...