YoungFaa/npsr: Validate Instrumental Variables using NPS

An R implementation of the Necessary and Probably Sufficient (NPS) test for finding valid instrumental variables, as suggested by Amit Sharma (2016, Working Paper) <>. The NPS test, compares the likelihood that a given set of observational data of the three variables Z, X and Y is generated by a valid instrumental variable model (Z -> X -> Y) to the likelihood that the data is generated by an invalid IV model.

Getting started

Package details

MaintainerFabian Sellmann <>
Package repositoryView on GitHub
Installation Install the latest version of this package by entering the following in R:
YoungFaa/npsr documentation built on May 17, 2019, 6:36 p.m.