Article history: Received 29 March 2013 Available online 10 February 2014 JEL classification: C72 D83 D85

Article history: Received 30 November 2007 Available online 31 August 2011 JEL classification: D82 D83

Article history: Received 3 September 2010 Available online 21 June 2011 JEL classification: C72 D82

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