Human dynamics: Darwin and Einstein correspondence patterns

In an era when letters were the main means of exchanging scientific ideas and results, Charles Darwin (1809–82) and Albert Einstein (1879–1955) were notably prolific correspondents. But did their patterns of communication differ from those associated with the instant-access e-mail of modern times? Here we show that, although the means have changed, the communication dynamics have not: Darwin's and Einstein's patterns of correspondence and today's electronic exchanges follow the same scaling laws. However, the response times of their surface-mail communication is described by a different scaling exponent from e-mail communication, providing evidence for a new class of phenomena in human dynamics.

[1]  C. Darwin,et al.  The Correspondence of Charles Darwin , 1988 .

[2]  Ward Whitt,et al.  Asymptotics for M/G/1 low-priority waiting-time tail probabilities , 1997, Queueing Syst. Theory Appl..

[3]  Shlomo Havlin,et al.  Return intervals of rare events in records with long-term persistence , 2004 .

[4]  Albert-László Barabási,et al.  The origin of bursts and heavy tails in human dynamics , 2005, Nature.

[5]  D. Siegel,et al.  The collected papers of Albert Einstein. , 2007, Isis; an international review devoted to the history of science and its cultural influences.