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{\Large {\bf Weak Instrumental Variables:  Limitations of Traditional 2SLS and  Exploring Alternative IV Estimators}}\\
\vspace{1.75cm} {\large Madhurima Chandra}\footnote{s6machan@uni-bonn.de}\\
\vspace{0.75cm}{\large Research Module in Econometrics and Statistics 2019-20}
\vspace{0.15cm}\\{\large University of Bonn}
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\begin{abstract}
    This paper delves into theoretical aspects of weak instrumental variables. We present the problems the two-stage least squares instrumental variables estimator runs into in presence of weak instruments, rendering our estimates biased. We take a deeper look at defining and testing for weakness of instruments. We then present two alternative estimators which are partially robust with weak instruments.
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