As More Results Come In, School Choice Looks Good ``the Witte Study!'' Opponents Cried, When Gov. Tom Ridge And Others Made The Case To Bring School Vouchers To Pennsylvania. ``check The Witte Study!'' The Argument Worked. John Witte's Study, Which Purportedly Showed The Ineffectiveness Of Milwaukee's School-choice Program, Trumped Ridge And His Allies. Its Results Help Explain Why Pennsylvania Remains Without A Voucher Program Today.