Z_product

theta_z

<p>Calculate the product of theta to power of Qi over Q.</p>

internal

An R implementation of the Necessary and Probably Sufficient (NPS) test for finding valid instrumental variables, as suggested by Amit Sharma (2016, Working Paper) <http://amitsharma.in/pubs/necessary_probably_sufficient_iv_test.pdf>. 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.

Fabian Sellmann

npsr

Validate Instrumental Variables using NPS

Bojan Nicolic

J<c3><b6>rn Grahl

Z_product function

Z_product — Z_product

Z_product: Z_product

Description

Usage

Arguments