O Brother, Where Start Thou? Sibling Spillovers in College Enrollment

Working Paper: NBER ID: w26502

Authors: Joshua Goodman; Michael Hurwitz; Christine Mulhern; Jonathan Smith

Abstract: We study within-family spillovers in college enrollment to show college-going behavior is transmissible between peers. Because siblings’ test scores are weakly correlated, we exploit college-specific admissions thresholds that directly affect older but not younger siblings’ college options. Older siblings’ admissibility substantially increases their own four-year college enrollment rate and quality of college attended. Their improved college choices in turn raise younger siblings’ college enrollment rate and quality of college chosen, particularly for families with low predicted probabilities of college enrollment. Some younger siblings follow their older sibling to the same campus but many upgrade by choosing other colleges. The observed spillovers are not well-explained by price, income, proximity or legacy effects, but are most consistent with older siblings transmitting otherwise unavailable information about the college experience and its potential returns. The importance of such personally salient information may partly explain persistent differences in college-going rates by income, geography and other characteristics that define a community.

Keywords: No keywords provided

JEL Codes: D1; D62; I20; I23; I24; J24


Causal Claims Network Graph

Edges that are evidenced by causal inference methods are in orange, and the rest are in light blue.


Causal Claims

CauseEffect
Older siblings' admissibility to specific colleges (I23)Older siblings' enrollment rates (I24)
Older siblings' enrollment rates (I24)Younger siblings' college enrollment rates (I24)
Older siblings' admissibility to specific colleges (I23)Quality of colleges attended by older siblings (I24)
Quality of colleges attended by older siblings (I24)Quality of colleges attended by younger siblings (I24)
Older siblings' college choices (I23)Younger siblings' college choices (C92)

Back to index