@article{Stock2002,
author = {Stock, J.H. and Wright, J.H. and Yogo, M.},
title= {A survey of weak instruments and weak identification in generalized method of moments},
year = {2002},
doi = {10.1198/073500102288618658},
journal = {Journal of Business and Economic Statistics},
volume = {20},
number = {4},
pages = {518--529},
}