The twin instrument : fertility and human capital investment / Sonia Bhalotra (University of Essex and IZA), Damian Clarke (Universidad de Santiago de Chile and IZA) ; IZA Institute of Labor Economics
VerfasserBhalotra, Sonia R. In der Gemeinsamen Normdatei der DNB nachschlagen ; Clarke, Damian In der Gemeinsamen Normdatei der DNB nachschlagen
KörperschaftForschungsinstitut zur Zukunft der Arbeit In der Gemeinsamen Normdatei der DNB nachschlagen
ErschienenBonn, Germany : IZA Institute of Labor Economics, October 2018
Elektronische Ressource
Umfang1 Online-Ressource (45, A34 Seiten) : Diagramme
SerieDiscussion paper ; no. 11878
URNurn:nbn:de:hbz:5:2-169016 Persistent Identifier (URN)
 Das Dokument ist frei verfügbar.
The twin instrument [0.91 mb]
Verfügbarkeit In meiner Bibliothek
Zusammenfassung (Englisch)

Twin births are often used to instrument fertility to address (negative) selection of women into fertility. However recent work shows positive selection of women into twin birth. Thus, while OLS estimates will tend to be downward biased, twin-IV estimates will tend to be upward biased. This is pertinent given the emerging consensus that fertility has limited impacts on women's labour supply, or on investments in children. Using data for developing countries and the United States, we demonstrate the nature and size of the bias in the twin-IV estimator of the quantity-quality trade-off and estimate bounds on the true parameter.