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The post concerns Yuval Peres, a principal researcher in the Microsoft Theory Group and a former colleague of mine at UC Berkeley. Below is a copy of an email sent yesterday to numerous theory of computer science professors worldwide, and published on the Stanford Theory Seminar List. It corroborates information I heard about Yuval Peres a number of years ago when I was a mathematics professor at UC Berkeley. At the time I was asked to keep the information I heard confidential, and I did so because the person who discussed it with me was, understandably, afraid of retaliation. Now I wonder to what extent my silence allowed his harassment of women to continue unabated. I also wonder when the leaders of the statistics department at UC Berkeley, where Peres used to work, and where Terry Speed was a professor emeritus before I reported him, will end their culture of silence.

Hello all,

This is an email composed by Irit Dinur, Oded Goldreich and me. The purpose of this email is to share with you concerns that we had regarding the unethical behavior of Yuval Peres. The behavior we are referring to includes several recent incidents from the past few years, on top of the two “big” cases of sexual harassment that led to severe sanctions against him by his employer, Microsoft, and to the termination of his connections with the University of Washington. Together with two colleagues who are highly regarded and trusted by us, we have first and second-hand testimonies (by people we trust without a shed of doubt) of at least five additional cases of him approaching junior female scientists, some of them students, with offers of intimate nature, behavior that has caused its victims quite a bit of distress since these offers were “insistent”. While the examples that we encountered from the last few years do not fall under the category of sexual harassment from a legal point of view, they certainly caused great discomfort to the victims, who were young female scientists, putting them in a highly awkward situation, and creating an atmosphere that they’d rather avoid (i.e., they would rather miss a conference or a lecture than risk being subjected to repeated intimate offers by him). We wish to stress that his aggressive advances toward young women, usually with no previous friendly connections with him, puts them in a vulnerable position of fearing to cross a senior scientist who might have an impact on their career, which is at a fragile stage. We believe that the questions of whether or not Yuval Peres intended to make them uncomfortable, and whether or not he would or could actually harm their scientific status are irrelevant; the fact is that the victims felt very stressed to a point that they’d rather miss professional events than risk encountering the same situation again. Needless to say, it is the responsibility of senior members of our community to avoid putting less senior members in such a position.

Our current involvement with this issue was triggered by an invitation Yuval Peres received to give a plenary talk at an international conference next year. We felt that this invitation sends a highly undesirable message to our community in general, and to the women he harassed in particular, as if his transgressions are considered unimportant.

We sent an email conveying our concern to the organizers of the conference, suggesting that they disinvite him. With our permission, they forwarded a version of our letter (in which we made changes in order to protect the identity of the women involved) to Yuval Peres. They did not reveal our identity, rather they told him that this is a letter from “senior members of the community”. In our letter we included a paragraph describing a general principle that should be followed. The principle is:

A senior researcher should not approach a junior researcher with an invitation that may be viewed as intimate or personal unless such an invitation was issued in the past by this specific junior to that specific senior. The point being that even if the senior researcher has no intimate/personal intentions, such intentions may be read by the junior researcher, placing the junior in an awkward situation and possibly causing them great distress. Examples for such an invitation include any invitation to a personal event in which only the senior and the junior will be present (e.g., a two-person dinner, a meeting in a private home, etc).

Yuval’s reply was rather laconic, in particular, he did not address the issue of his behavior in the past couple of years. However, he did write:

“I certainly embrace the principle described in boldface in the letter. This seems to be the right approach for any senior scientist these days.”

The reason we are copying this to all of you (as opposed, for example, to using bcc) is related to the islanders’ paradox: we believe that the fact that everyone knows that everyone knows is a significant boost to holding Yuval Peres accountable for his future actions. We’re also bcc’ing several young women who already aware of Yuval Peres’s actions, in order to keep them in the know too.

We understand that sending this out to a large number of people without offering Yuval Peres the chance to respond may be considered unfair. However, after weighing the pros and cons carefully we believe this is a good course of action. First of all, because it is clear that the victims did not invent his offers and their ensuing feelings of anxiety and stress. Secondly, we know that Yuval Peres has been confronted in a face to face conversation by a senior colleague, and it did not end his behavior, so we think it’s important to stay vigilant in protecting the younger members of our community. Thirdly, the information in this letter will reach (or has already reached) almost all of you in any case, so the main effect of the letter is making what everyone knows into public knowledge. Finally, although his response to the organizers did include the minimum of declaring he accepts the guiding principle that we stated, it did not include any reference to the ongoing behavior we described- neither regret nor concern nor denial. So it’s not easy to assume that he truly intends to mend his ways.

We hope that our actions will contribute to the future of our community as an environment that offers all a pleasant and non-threatening atmosphere.

Sincerely,
Irit Dinur, Ehud Friedgut, Oded Goldreich

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