scientific article published in June 2006

scientific article published in November 1993

scientific article published in July 2010

scientific article published in December 2012

scientific article published in June 1988

scientific article published in April 2020

scientific article published in March 2004

scientific article published in July 1991

scientific article published in April 2015

academic journal article

scientific article published in September 2002

scientific article published in December 1993

scientific article published in April 2000

scientific article published in January 2019

scientific article published in April 2018

scientific article published in May 2002

scientific article published in August 1990

scientific article published in September 1986

scientific article published in April 1988

scholarly article published April 1991

scientific article published in September 2006

scientific article published in May 2019

article from Journal of Labor Economics in October 1999

scientific article published in November 1990

scientific article published in December 1995

scientific article published on 01 November 1998

scientific article published in March 2006

scientific article published in February 1978

scientific article published in May 2018

scientific article published in November 2007

scientific article published in February 1994

scientific article published in March 2006

scientific article published in July 2000

scientific article published in January 1977

scientific article published in March 1992

scientific article published in January 1991

scientific article published in September 2005

scientific article published in June 1991

scientific article published in September 2013

scientific article published in October 2009

scientific article published in February 1996

academic journal article

scientific article published in October 2015

scientific article published in June 2017

scientific article published in September 2011

scientific article published in May 2020

scientific article published in March 2009

scientific article published in February 2012

scientific article published in August 1976

scientific article published in March 2017

scientific article published in December 1994

scientific article published in April 1998

scientific article published in December 1984

scientific article published in June 2003

scientific article published in March 2005

scientific article published in March 2016

scientific article published in June 1986

scientific article published in June 1985

scientific article published in June 2013

scientific article published in September 2015

scientific article published in January 2016

scientific article published in November 2002

scientific article published in June 2003

scientific article published in March 2014

scientific article published in November 1994