Physics – Physics and Society
Scientific paper
2009-09-25
Science 325 (5948): 1696-1700 (2009)
Physics
Physics and Society
17 pages, 3 figures, 1 table
Scientific paper
10.1126/science.1174562
Identifying and modeling patterns of human activity has important ramifications in applications ranging from predicting disease spread to optimizing resource allocation. Because of its relevance and availability, written correspondence provides a powerful proxy for studying human activity. One school of thought is that human correspondence is driven by responses to received correspondence, a view that requires distinct response mechanism to explain e-mail and letter correspondence observations. Here, we demonstrate that, like e-mail correspondence, the letter correspondence patterns of 16 writers, performers, politicians, and scientists are well-described by the circadian cycle, task repetition and changing communication needs. We confirm the universality of these mechanisms by properly rescaling letter and e-mail correspondence statistics to reveal their underlying similarity.
Campanharo Andriana S. L. O.
Malmgren Dean R.
Nunes Amaral Luis A.
Stouffer Daniel B.
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