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UID:event-8975@www.amse-aixmarseille.fr
DTSTAMP:20260421T135950Z
CREATED:20260421T135950Z
LAST-MODIFIED:20260421T135950Z
STATUS:CONFIRMED
SEQUENCE:0
SUMMARY:Economic theory seminar - Ron Peretz
DTSTART:20220331T100000Z
DTEND:20220331T110000Z
DESCRIPTION:We study a model of opinion exchange in social networks where a
  state of the world is realized and every agent receives a zero-mean noisy 
 signal of the realized state. It is known from Golub and Jackson that under
  DeGroot dynamics agents reach a consensus that is close to the state of th
 e world when the network is large. The DeGroot dynamics\, however\, is high
 ly non-robust and the presence of a single "stubborn agent" that does not 
 adhere to the updating rule can sway the public consensus to any other valu
 e. We introduce a variant of DeGroot dynamics that we call 1/m-DeGroot. 1/m
 -DeGroot dynamics approximates standard DeGroot dynamics to the nearest rat
 ional number with m as its denominator and like the DeGroot dynamics it is 
 Markovian and stationary. We show that in contrast to standard DeGroot dyna
 mics\, 1/m-DeGroot dynamics is highly robust both to the presence of stubbo
 rn agents and to certain types of misspecifications.\\n\\nContact: Gaëtan 
 Fournier: gaetan.fournier[at]univ-amu.frEvgeny Tsodikovich: evgeny.tsodikov
 ich[at]univ-amu.fr\n\nPlus d'informations: https://www.amse-aixmarseille.fr
 /en/events/ron-peretz-0
LOCATION:Îlot Bernard du Bois - Salle 16\, AMU - AMSE\, 5-9 boulevard Maur
 ice Bourdet\, 13001 Marseille
URL;VALUE=URI:https://www.amse-aixmarseille.fr/en/events/ron-peretz-0
CONTACT:Gaëtan Fournier: gaetan.fournier[at]univ-amu.frEvgeny Tsodikovich:
  evgeny.tsodikovich[at]univ-amu.fr
TRANSP:OPAQUE
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