Estimator with zero expected error.

Estimator with zero expected error.

Forward rates predict future spot rates.

In statistics, best linear unbiased prediction is used in linear mixed models for the estimation of random effects.

In statistics and in particular statistical theory, unbiased estimation of a standard deviation is the calculation from a statistical sample of an estimated value of the standard deviation (a measure of statistical dispersion) of a population of values, in such a way that the expected value of the calculation equals the true value.