Round-up and reflections by my colleague Nick Aylott (apologies for the self-referential link at the end).
Henrik Oscarsson notes that a quirk in the Swedish election system may lead the Alliance to lose the majority it would have won if the system had been more proportional.
Whoops: Forgot these
Gissur Erlingsson argues that the success of the Sweden Democrats was caused not by a change in public opinion (demand) but a change in organisational strategies and capabilities (supply). If you have some kind of institutional access, you might also want to check these (gated) papers by Jens Rydgren: “Radical Right Populism in Sweden: Still a Failure, But for How Long?” (from 2002) and “Is extreme right-wing populism contagious? Explaining the emergence of a new party family” (from 2005).