Granger

There really is no danger
That we'll forget Clive Granger
Nobel prize winner that he became
Cointegrated series brought him to fame
More care in studying trends
Was what he taught us
And gave the concept to his name
From Nottingham to UCSD
With Robert Engle by his side
For econometricians everywhere
He is a source of pride.

Backing Bayes

According to Thomas Bayes
Everything is conditional
And of probability he says
We should not be traditional
When new information comes
You must redo all your sums
With prior and posterior
This approach is superior
Must more realistic
To give you a statistic.