jive.est                The Jackknife Instrumental Variable Estimator
                        (JIVE).
jive.internal           Internal function for the Jackknife
                        Instrumental Variable Estimator (JIVE).
ols.est                 The Ordinary Least Squares (OLS) Estimator.
sps.est                 Semi-parametric Stein-like (SPS) estimator.
sps.internal            Internal function for Semi-parametric
                        Stein-like (SPS) estimator.
tr                      Trace of a matrix.
tsls.est                The Two-Stage Least Squares (TSLS) estimator.
