Time+Place: Tuesday 18/02/2014 14:30 Room Taub 5 Bld.
Title: The Dynamics of Reputation and its Origins, in Economic and Social Contexts
Speaker: Amir Ban - Colloquium Lecture http://www.ratio.huji.ac.il/node/2332
Affiliation: Center for the Study of Rationality, Hebrew University
Host: Johann Makowsky


Reputation systems collect, maintain and disseminate reputations 
as a summary numerical score of past interactions of an 
establishment with its users. As reputation systems, including web 
search engines, gain in popularity and become a common method for people 
to select sought services, a dynamical system unfolds: Experts' 
reputation attracts the potential customers. The experts' expertise 
affects the probability of satisfying the customers. This rate of 
success in turn influences the experts' reputation. We consider several 
models where each expert has innate, constant, but unknown level of 
expertise and a publicly known, dynamically varying, reputation.

Is it inevitable that the expert with the highest expertise will end up 
having the highest reputation? We answer this in the negative. We point 
out that market share and reputation are closely related concepts, and 
ask: Is market share an indication of quality? Our answer here is 

Joint work with Nati Linial, School of Computer Science and Engineering, 
Hebrew University

Short Bio:

Amir Ban was born in 1956 in Israel and now lives in Ramat Sharon and is 
a father of three. Amir has an B.Sc. and M.Sc. from the computer science 
department of the Technion. He currently completes a Ph.D. at the Center 
for the Study of Rationality of the Hebrew University.

Amir Ban has a long and successful career in the hightech industry.
He was one of the founders of M-Systems, which he led for 13 years. 
His best known invention among the wider public was the Disk-on-Key. 
The company was sold in 2006 to SanDisk.

In recent years Amir Ban continues to be active in hightech start-up 

Amir Ban and Shay Bushinsky are the authors of "Junior", the current 
world champion computer chess program (which was also world champion 6 
times before. http://en.wikipedia.org/wiki/Junior_(chess)