Norway is reviewing its subsidies for electric vehicles after generous government incentives made the country the biggest user of battery powered cars in the world, hurting state revenues, the finance ministry said. Norway registered its 50,000th electric car on Monday, almost three years earlier than expected thanks to government schemes that have cut taxes and provided a plethora of benefits, including an exemption from tolls and parking fees, free recharging stations and the use of bus lanes. http://www.reuters.com/article/2015/04/20/norway-autos-idUSL5N0XH34320150420
This has been discussed over and over in the investment threads. The incentives will last at least in to 2017, the political atmosphere right now does not at all point to any incentives being removed before then. Reuters is basing this on old info.
If Norway's "state revenues" are being hurt, then it is probably not because of EV subsidies...the reason is the same as here in Canada... all countries that are oil exporters are experiencing lower revenue ...