GUPEA >
School of Business, Economics and Law / Handelshögskolan >
Department of Economy and Society / Institutionen för ekonomi och samhälle (2013-) >
Working Papers / Department of Economy and Society >

Instrumental variables based on twin births are by definition not valid


Please use this identifier to cite or link to this item: http://hdl.handle.net/2077/56132

Files in This Item:

File Description SizeFormat
gupea_2077_56132_1.pdf398KbAdobe PDF
View/Open
Title: Instrumental variables based on twin births are by definition not valid
Authors: Öberg, Stefan
Issue Date: Apr-2018
Publication type: report
Series/Report no.: Göteborg Papers in Economic History
23
Keywords: causal inference
natural experiments
local average treatment effect
complier average causal effect
Rubin’s causal model
quantity–quality trade-off
family size
Abstract: Instrumental variables based on twin births are a well-known and widespread method to find exogenous variation in the number of children when studying the effect on siblings or parents. This paper argues that there are serious problems with all versions of these instruments. Many of these problems have arisen because insufficient care has been given to defining the estimated causal effect. This paper discusses this definition and then applies the potential outcomes framework to reveal that ... more
ISSN: 1653-1000
URI: http://hdl.handle.net/2077/56132
Appears in Collections:Working Papers / Department of Economy and Society

 

 

© Göteborgs universitet 2011