The Debate over Teacher Merit Pay: A Freakonomics Quorum
“Thirty years ago, the methodologist Donald T. Campbell framed what he called a ‘law’ of performance measurement:
‘The more any quantitative social indicator is used for social decision-making, the more subject it will be to corruption pressures and the more apt it will be to distort and corrupt the social processes it is intended to monitor.’
Since then, social scientists have documented how simple accountability or incentive systems based on quantitative output indicators have actually harmed the institutions they were designed to improve – not only in education but in business, health care, welfare policy, human capital development, criminal justice, and public administration.”
Read more: http://www.freakonomics.com/2011/09/20/the-debate-over-teacher-merit-pay-a-freakonomics-quorum/
Montreal Teachers 4 Change.org 
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