I am delighted to welcome Christopher Jencks to the company of those who favor the voucher system for distributing governmental funds to finance schooling. The welcome is all the warmer because Mr. Jencks is of the still smaller company of those who recognize that market competition would be far more effective than governmental operation in fostering diversity, experimentation, and improvement in the quality of schooling. As he points out, one great merit of the system of tuition grants is that it would very likely lead to the large scale replacement of governmentally operated schools by non-governmental schools.