Last year a study was published called : Study of the effects on employment of public aid to renewable energy sources
http://www.juandemariana.org/pdf/090327-employment-public-aid-renewable.pdf

Europe’s current policy and strategy for supporting the so-called “green jobs” or renewable energy dates back to 1997, and has become one of the principal justifications for U.S. “green jobs” proposals. Yet an examination of Europe’s experience reveals these policies to be terribly economically counterproductive.

Spain's official response was as expected. http://switchboard.nrdc.org/blogs/paltman/media/Rodriguez%20letter.pdf

9 days ago came this from 2 Italian researchers who reported even worse results in Italy.
http://online.wsj.com/article/SB10001424052748704342604575222021623817924.html?mod=WSJ_latestheadlines
The "green economy" is supposed to be a win-win situation, as massive subsidies for renewable energy sources and other "clean" technologies would help both the environment and the economic recovery. The facts on the ground tell a different story, though. In Italy, for example, we calculated that each green job comes at the expense of 4.8 "dirty" jobs. That's an awful lot of waste for a movement that's meant to be all about efficient resource use.
...
Our results are largely consistent with the evidence provided by Professor Gabriel Calzada of the Universidad Rey Juan Carlos, who found that in Spain, one green job costs on average as much as 2.2 "dirty" jobs. The reason why the Italian figure is more than twice as high is mostly because Italy, unlike Spain, is technology importer, not a producer.


There's been a document leak that shows internally, Spain's government knows the green jobs experiment is a failure of even worse proportion than last year's study.

http://pajamasmedia.com/blog/spains-green-policies-an-economic-disaster/
Pajamas Media has received a leaked internal assessment produced by Spain’s Zapatero administration. The assessment confirms the key charges previously made by non-governmental Spanish experts in a damning report exposing the catastrophic economic failure of Spain’s “green economy” initiatives.

So now we know why Spain is moving to ditch their green jobs investments in the face of economic catastrophe. Time will tell if they are too late.
http://www.businessweek.com/news/2010-04-30/spain-pricks-solar-power-bubble-as-greek-fate-looms-update1-.html