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In page Early childhood education:
"Nathaniel Hendren and Ben Sprung-Keyser, two Harvard economists, found high Marginal Values of Public Funds (MVPFs) for investments in programs supporting the health and early education of children, particularly those that reach children from low-income families. The average MVPF for these types of initiatives is over 5, while the MVPFs for programs for adults generally range from 0.5 to 2.[10]
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