Article history: Received 12 December 2007 Available online 24 December 2008 JEL classification: J33 M52 C93

Article history: Received 19 February 2007 Available online 30 October 2009 JEL classification: C78 D70 D78

Article history: Received 14 September 2010 Available online 22 August 2013 JEL classification: D86

Article history: Received 26 May 2009 Available online 29 July 2010 JEL classification: C72

Article history: Accepted 22 April 2013 JEL classification: C62 C68 D43 D21 L13 L25

Article history: Accepted 15 February 2011 JEL classification: D90 C62 O21

Article history: Accepted 30 October 2013 JEL classification: E62 O11 O41

Article history: Received 13 February 2010 Available online 1 June 2012 JEL classification: C72 D83

Article history: Received 4 April 2013 Available online 27 November 2013 JEL classification: C70 D82

Article history: Accepted 20 November 2013 Available online xxxx JEL classification: G12 G14