1. The Common Structure of Statistical Models of Truncation, Sample Selection and Limited Dependent Variables and a Simple Estimator for Such Models;Heckman,;Annals of Economic and Social Measurement,1976
2. High School Type, Sex and Socio-Economie Factors as Predictors of the Academic Achievement of University Students;McDonald,;Educational and Psychological Measurement,1975
3. Eighth Five Year Plan 1993–1998,1994
4. Determinants of Performance in Introductory Courses in Economics and Seven Other Disciplines;Sabot,,1990
5. Higher Education and Employment Opportunities in Pakistan,1987