What indeed can be tested with an instrumental variable?
Crossref DOI link: https://doi.org/10.1007/s10654-018-0423-7
Published Online: 2018-06-25
Published Print: 2018-08
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Burgess, Stephen
Text and Data Mining valid from 2018-06-25
Article History
First Online: 25 June 2018