The following tables show the results of the probit analysis for the Senate and the House. A table including results for different combinations of the independent variables is included in an unpublished appendix available from the authors upon request. The results of the probit analysis for the...

Milton Friedman has suggested that the political power of the American Federation of Teachers and the National Education Association (the two major teachers unions) has been instrumental in defeating the adoption of educational vouchers. We test this hypothesis. We find that a campaign...