1981-1969 1981-1969 S1981-19692019000100017 10.5380/jpe.v13i0.64894 00 00 2019 00 00 2019 13

2016 2013 2012 38 2 2 373-88 2006 36 128 128 377-401 2011 2 3-64 2018 2018 2004 106 6 6 1145-76 2012 2001 2013 43 148 148 348-65 2008 2008 30 2 2 75-110 2011 2006 112 4 4 496-520 2006 63 4 4 36-40 LEARNING POINT ASSOCIATES 2004 2015 117 2016 2006 2015 117 1-40 2001 135-68 2014 25 59 59 78-107 2015 117 2017 28 2 2 242-58 2010 2013 38 1-116 2012 2002 31 7 7 15-21