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SUMMARY:Migration of Populations via Marriages in the Past - Mason Porter 
 (University of Oxford)
DTSTART:20150427T131000Z
DTEND:20150427T135000Z
UID:TALK59292@talks.cam.ac.uk
CONTACT:Eoin Devane
DESCRIPTION:The study of human mobility is both of fundamental importance 
 and of great potential value. For example\, it can be leveraged to facilit
 ate efficient city planning and improve prevention strategies when faced w
 ith epidemics. The newfound wealth of rich sources of data—including ban
 knote flows\, mobile phone records\, and transportation data—has led to 
 an explosion of attempts to characterize modern human mobility. Unfortunat
 ely\, the dearth of comparable historical data makes it much more difficul
 t to study human mobility patterns from the past. In this paper\, we prese
 nt an analysis of long-term human migration\, which is important for proce
 sses such as urbanization and the spread of ideas. We demonstrate that the
  data record from Korean family books (called “jokbo”) can be used to 
 estimate migration patterns via marriages from the past 750 years. We appl
 y two generative models of long-term human mobility to quantify the releva
 nce of geographical information to human marriage records in the data\, an
 d we find that the wide variety in the geographical distributions of the c
 lans poses interesting challenges for the direct application of these mode
 ls. Using the different geographical distributions of clans\, we quantify 
 the “ergodicity” of clans in terms of how widely and uniformly they ha
 ve spread across Korea\, and we compare these results to those obtained us
 ing surname data from the Czech Republic. To examine population flow in mo
 re detail\, we also construct and examine a population-flow network betwee
 n regions. Based on the correlation between ergodicity and migration in Ko
 rea\, we identify two different types of migration patterns: diffusive and
  convective. We expect the analysis of diffusive versus convective effects
  in population flows to be widely applicable to the study of mobility and 
 migration patterns across different cultures.
LOCATION:MR2\, CMS
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