Article history: Received 2 August 2007 Available online 14 January 2015 JEL classification: C78 D83

Article history: Received 13 April 2016 Available online 28 December 2016 JEL classification: D83

Article history: Received 13 July 2009 Available online xxxx JEL classification: C72 D82

Article history: Accepted 25 February 2013 JEL classification: G12 G14 E43

Article history: Received 8 May 2008 Available online 5 August 2009 JEL classification: A14 D20 J00

Article history: Received 21 April 2008 Available online 28 April 2010 JEL classification: C72

Article history: Received 23 December 2008 Available online 18 January 2009 JEL classification: C70

Article history: Accepted 19 February 2012 JEL classification: C72 D01 D43 L13

Article history: Received 4 October 2010 Available online 9 November 2010 JEL classification: C70 C72 C73

Article history: Received 7 May 2009 Available online 13 February 2010 JEL classification: C7 C9 D74