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...Head start a public preschool program for disadvantaged children is designed to close the gaps between these and their more advantaged peers begun in as part of war on poverty enjoys widespread bi partisan support however critics point out that there little evidence regarding lasting benefits participation this paper provides longer term effects using non experimental data drawn from panel survey income dynamics psid are three features key study first special questions about other preschools were added interviews make it possible ask whether confers any since they asked adult respondents age below who eligible participate during late sixties seventies second because which stretches back over quarter century we able control family background environment each respondent grew up great detail third evaluate programs actually existence at time young important most cited early intervention comes model such perry funded much higher levels than moreover contrast with large nationally represent...