Earlier Versions of the Trade Animation

The software needed to make the animation has developed rapidly. My first attempt to visualize the trade network in January 2015, using Gephi, looked like this:

The first animation appeared in March 2015 as an animated GIF:

By April 2015 we had a second animation made using Sonoma that is a movie (mp4) and presents the full set of years:

The new animation, completed in October 2017, is a major step forward both in the number of observations and the attractiveness of the geographic projection. I thank the makers of the Tulip data visualization software.