Why egg prices are sizzling — up 38% on last year The average price of a dozen large, Grade A eggs was $2.94 in July, up from $1.64 for the same period last year ...

Measuring Social Impact The Power of Theories of Change Improving the lives of disadvantaged populations—whether through better schools, after-school programs, or teen pregnancy prevention ...

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The prisoner's dilemma is a paradox in decision analysis in which two individuals acting in their own self-interests do not produce the optimal outcome.