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Tim Ogden looks at how some charities cancel their programs when evidence suggests they have low impact and others ignore the data. But Tim says that both reactions are wrong and instead we need to understand how long change takes.
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Dennis Whittle of Global Giving defends online giving contests.
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Holden Karnofsky, who has concerns about the impact of microfinance, argues that concerns about high interest rates are misplaced and that no interest rate is too high if enough impact is being achieved.
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Tim Ogden argues that being a program officer at a foundation is the hardest job in the world and he has evidence to back it up.