Parker, Philip D.; Marsh, Herbert; Thoemmes, Felix; Biddle, Nicholas
The Negative Year in School Effect (NYiSE) claims that grade-relative-to-age influences academic self-concept. Being young for your grade is associated with lower self-concept, whereas being old for your grade is associated with higher self-concept. We extend this research in several ways. First, we aim to improve causal claims for the NYiSE by utilizing birth month as an instrumental variable. Using the Longitudinal Study of Australian Youth we find that the NYiSE is negative under...[Show more]
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