AUVSI have just released their report The Economic Impact of Unmanned Aircraft Systems Integration in the United States which forecasts 70,000 jobs created by 2015 and $13.6 billion economic impact in the US.
http://www.auvsi.org/econreport
IFR, the International Federation of Robotics, released “The Positive Impact of Robots on Jobs” in 2011 . The report was authored by Peter Gorle and Andrew Clive from Metro Martech.
http://www.ifr.org/uploads/media/Metra_Martech_Study_on_robots_02.pdf
IFR updated this report in February 2013.
http://www.ifr.org/uploads/media/Update_Study_Robot_creates_Jobs_2013.pdf
Automate, January 2013, featured a presentation by the IFR: