1. A simultaneous equations model of the educational process;Boardman;J. publ. Econ.,1971
2. A simultaneous equations model of the educational proeess; the Coleman data revisited with an emphasis upon achievement;Boardman,1973
3. Simultaneous equations models of the educational process;Boardman,1976
4. Equality of Educational Opportune;Coleman,1966
5. Intergovernmental grants: a review of the empirical literature;Gramlich,1972