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An introduction to using twin births as instrumental variables for sibship size


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Title: An introduction to using twin births as instrumental variables for sibship size
Authors: Öberg, Stefan
Issue Date: Apr-2017
Publication type: report
Series/Report no.: Göteborg Papers in Economic History
22
Keywords: instrumental variables
twins
twin births
family size
exogenous variation
causal estimation
sibship size
Abstract: Some families who experience a twin birth get one more child than they had intended and planned for. This is the reason why twin births are used to create instrumental variables (IVs) for the number of children in a family. In this chapter I introduce IV techniques in general and the use of twin births for IVs in particular. IVs based on parity-specific twin births can indeed, under certain circumstances, be valid and reliable. In this chapter I discuss what these circumstances are. I rely heavi... more
ISSN: 1653-1000
URI: http://hdl.handle.net/2077/52286
Appears in Collections:Working Papers / Department of Economy and Society

 

 

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