Research in Economics
Research in Economics > 2012 > 66 > 1 > 72-81
Research in Economics > 2013 > 67 > 2 > 111-116
Research in Economics > 2017 > 71 > 1 > 159-170
Research in Economics > 2012 > 66 > 1 > 72-81
Research in Economics > 2013 > 67 > 2 > 111-116
Research in Economics > 2017 > 71 > 1 > 159-170