1. What does the help-wanted index measure;Abraham,1984
2. Cyclical unemployment: sectoral shifts or aggregate disturbances?;Abraham,1984
3. Unemployment spells and unemployment experience;Akerlof;American Economic Review,1980
4. Estimating the effect of training programmes on earnings with longitudinal data;Ashenfelter;Review of Economics and Statistics,1978
5. Bargaining theory, trade unions, and industrial strike activity;Ashenfelter;American Economic Review,1969