# Tag: Variance

## A recent article on Local Projections

In a recent article published in the Journal of econometrics, we have some further insights about the bias-variance trade-off between IRF (Impulse Response Function) produced by the VAR…

## Illustrating that the sample variance bias decreases with the sample size using R and Mathematica

In my previous blog, I recall that we can demonstrate in a few steps that the sample variance is an unbiased estimator of the population variance when we…

## Illustrating the sample variance bias with R and Mathematica

In my previous blog, I recall that we can demonstrate in a few steps that the sample variance is an unbiased estimator of the population variance when we…

## Moments of a discrete distribution with Mathematica

One way to convince some students that it is simple to demonstrate the value of the two first moments of a discrete distribution is to use Mathematica and…

## Unbiased estimator for population variance: clearly explained!

Estimator: A statistic used to approximate a population parameter. Sometimes called a point estimator. Estimate: The observed value of the estimator. Unbiased estimator: An estimator whose expected value…