\[
\DeclareMathOperator{\E}{E}
\DeclareMathOperator{\mean}{mean}
\DeclareMathOperator{\Var}{Var}
\DeclareMathOperator{\Cov}{Cov}
\DeclareMathOperator{\Cor}{Cor}
\DeclareMathOperator{\Bias}{Bias}
\DeclareMathOperator{\MSE}{MSE}
\DeclareMathOperator{\RMSE}{RMSE}
\DeclareMathOperator{\sd}{sd}
\DeclareMathOperator{\se}{se}
\DeclareMathOperator{\rank}{rank}
\DeclareMathOperator*{\argmin}{arg\,min}
\DeclareMathOperator*{\argmax}{arg\,max}
\newcommand{\Mat}[1]{\boldsymbol{#1}}
\newcommand{\Vec}[1]{\boldsymbol{#1}}
\newcommand{\T}{'}
\newcommand{\distr}[1]{\mathcal{#1}}
\newcommand{\dnorm}{\distr{N}}
\newcommand{\dmvnorm}[1]{\distr{N}_{#1}}
\newcommand{\dt}[1]{\distr{T}_{#1}}
\newcommand{\cia}{\perp\!\!\!\perp}
\DeclareMathOperator*{\plim}{plim}
\]
Reproducible Research