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...Imbens wooldridge lecture notes summer what s new in econometrics nber monday july th am estimation of average treatment eects under unconfoundedness introduction this we look at several methods for estimating a program or regime the setting is one with binary traditional example economics that labor market where some individ uals receive training and others do not interest measure eectiveness term coined by rubin refers to case non parametrically adjusting dierences xed set covariates removes biases comparisons between treated control units thus allowing causal interpretation those adjusted perhaps most important special treatmenteectsin practice alternativestypicallyinvolvesstrong assumptions link ing unobservables observables specic ways order allow relevant unobserved variables an such strategy instrumental which will be discussed second does involve additional bounds approach developed manski make population treat ment eect can estimated standard parametric n rate without function...