Econometrics
The Kolmogorov-Smirnov Test

The Kolmogorov-Smirnov Test

In statistics we are often estimating parameters and then, using some hypothesis test, we can find out if we should either reject our null hypothesis or not. Now in these tests we almost always rely on some known distribution of a so-called test statistic. Let us...

Is OLS a thing of the past?

Is OLS a thing of the past?

[latexpage] One of the most popular regression methods an econometrician learns is the Ordinary Least Squares (OLS). It is a simple and elegant way of estimating parameters in linear regression. However, there is another technique to perform linear regression using...

The medical test paradox

The medical test paradox

[latexpage] Testing has been quite a significant subject during this pandemic. Around 30.000 people a day are being tested in the Netherlands alone, so it is quite important that such a test can accurately predict whether someone actually has the disease. However, an...

Reversion to mediocrity

Reversion to mediocrity

Nowadays, research in many fields involves statistics. Whether it comes down to a government's decisions on measures fighting a pandemic or the Red Bull formula 1 racing team deciding on whether Verstappen should swap tires in the next lap, it sounds like a good idea...

Do storks deliver babies?

Do storks deliver babies?

When you were still a little child, you were probably told that all babies were delivered by storks. Later, when you got older, you found out that this idea is total nonsense. However, imagine that you are still in doubt whether this idea is true, and to discover the...

Mr. Pity vs. Nature

Mr. Pity vs. Nature

Mr. Pity was a very, very unlucky man. As a kid he had once accidentally stepped on a butterfly in the forest. But this was no ordinary butterfly! It was the most beautiful butterfly Nature had ever produced. Out of revenge, Nature cursed young Mr. Pity: "Whatever you...

Italië en haar roze bril

Italië en haar roze bril

De afgelopen weken staan het Coronavirus en Italië centraal in het nieuws. Hierbij gaat het onder andere over de houdbaarheid van de schuld van Italië. Nederland neemt hier een harde houding in aan. In het artikel “Italiaans begrotingsbeleid is struisvogelpolitiek”...

The math behind the coronavirus

The math behind the coronavirus

[latexpage] At the moment we live in a big crisis, the corona crisis. Already more than one million people over the world are infected and more than 60,000 people died. A lot of countries are having big outbreaks and the health care is having capacity problems. This...

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