%0 Report %A Bhalotra, Sonia R. %A Clarke, Damian %T Analysis of Twins %D 2022 %8 2022 Sep %I Institute of Labor Economics (IZA) %C Bonn %7 IZA Discussion Paper %N 15609 %U https://www.iza.org/publications/dp15609 %X The occurrence of twin births has been widely used as a natural experiment. With a focus upon the use of twin births for identification of causal effects in economics, this chapter provides a critical review of methods and results. %K child penalty %K women's labour market outcomes %K birth spacing %K fertility %K child development %K identification %K twins