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The power of Theories of Change
by Paul Brest
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Improving the lives of disadvantaged populations—whether through better schools, after-school programs, or teen pregnancy prevention clinics—requires proven theories of change. The very development of a field depends on their diffusion, replication, critique, and modification. Yet some organizations refuse to articulate a theory of change and some funders think it would be intrusive to demand that they do so. The interests of all concerned are served by a developmental approach to creating and evaluating theories of change.