Interesting to see Renewables fare so well during the sample period, given the negative press the industry attracts. Is there a source for the segment that goes into further detail? It would be interesting to see if the biggest winners within the segment were high-tech areas (solar panel development), or service-related areas within the industry (specialized service technicians, LEED certified contractors, etc.)

Isn't this data highly dependent upon who signs up for LinkedIn? The busboy at a local restaurant seems less likely to sign up for LinkedIn than a software engineer would -- which seems like it would skew the data.