German soccer: A network summary

This network shows the results of every soccer match played in the German Erste Bundesliga from 1963-2014. Click to enlarge. A high-resolution PDF is also available.

The network structure of scientific collaboration in the journal Business & Information Systems Engineering and its predecessors

This picture shows the network of coauthorship in the scientific journals Business & Information Systems Engineering and its predecessors. As a result, you see mostly German IS researchers. The original data consists of thousands of authors, here we show only the largest connected component. Color, node layout and edge width were used to show who is working with whom.

Here is a high-resolution PDF. 

Please Email me if you have questions concerning the data or the network.

Whoooot?

There are curves of constant width besides circles and spheres

And they can be used to drill a square hole:

Little big data in German soccer

Wer gewinnt das Fußballspiel? Eine kurze Zusammenfassung aller bisherigen Bundesligaspiele. Hier ist ein hochauflösendes PDF. Tools: curl > regex > cytoscape > inkscape. Grafik von Jörn Grahl.

Econometrics vs Machine Learning

Machine learning (in particular deep learning) is currently a hot topic in CS and the social sciences because it can uncover reularities in large, high-dimensional datasets (and it really seems to work).

What is the relationship between machine learning and econometrics? I highly recommend two recent talks.

1. Hal Varian: Machine Learning and Econometrics (Youtube)
2. Sendhil Mullainathan: What Big Data Means For Social Science (edge.org)

What to demand from a Scientific Computing Language (even if you don't care about computing or languages)

"There is something in parantheses that is turning peoples' brains off." The great Peter Norvig (from Google and our favourite AI text-book) in defend of the Python programming language.

http://www.msri.org/summer_schools/556/schedules/4197

Should you outsource analytics?

Can the market provide better analytics than your org? A very interesting piece in the MITSloan Management Review. Read it here.