Nature 439, 462-465 (26 January 2006) | doi:10.1038/nature04292;
The scaling laws of human travel
D. Brockmann1,2, L. Hufnagel3 and T. Geisel1,2,4
http://www.nature.com/nature/journal/v439/n7075/full/nature04292.html
http://www.wheresgeorge.com/
http://www.wheresgeorge.com/report.php?key=f792b12d7658a7c2a58d52248125692921a9a24b4d4ced2c
http://www.wheresgeorge.com/report.php?key=deea10fdfb0a897405541dd69f73b948525e395738c564a5
The website wheresgeorge.com invites its users to enter the serial numbers of their US dollar bills and track them across America and beyond. Why? "For fun and because it had not been done yet", they say. But the dataset accumulated since December 1998 has provided the ideal raw material to test the mathematical laws underlying human travel, and that has important implications for the epidemiology of infectious diseases.
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