Powered by: Blackwell Publishing

HRET - Health Research & Educational Trust

HSR - Health Services Research

Impacting Health Practice and Policy Through State-of-the-Art Research and Thinking

Our Next Issue

December 2019
Coming Soon! Read

< ABSTRACT LIST

VOLUME 54 | NUMBER 3 | JUNE 2019


Instrumental variables: The power of wishful thinking vs the confounded reality of comparative effectiveness research

Keele and Small responded to our article on instrumental variables (IVs) published in Health Services Research in February 2017.1, 2 Here, we address their efforts to defend IVs and we present additional evidence of the unreliability of IVs in comparative effectiveness research (CER). We appreciate that some economists, statisticians, and other IV adherents are emboldened by their faith in the power of weak crosssectional associations to accurately reflect the world. But health outcomes research requires confronting the interrelatedness of social and medical factors—almost always a confounded reality with unmeasured and, indeed, unknown variables.3 That is, most IV studies assume life is far less confounded than it is..

back to top | back to article index | access/purchase full article

Copyright© 2018, Health Research & Educational Trust. All rights reserved. Content Disclaimer
Health Research & Educational Trust, 155 North Wacker, 4th Floor Chicago, IL 60606 (312) 422.2600