It is with deep regret to share the sad news about our mentor and friend, prof. Gregory Kersten, who unexpectedly passed away yesterday, on May 26th, 2020. To us, the members of N.EA team he was more than a colleague, as we have been collaborating with him for 20 years. The scientific carriers of some of us were shaped and developed under his fatherly guidance.

He was an accomplished researcher, decision and negotiation theorist, father of negotiation support systems, and electronic negotiations. He was an outstanding organizer of scientific life, leading the INFORMS Section on Group Decision and Negotiation (GDN) for many years, chairing the InterNeg Research Center, organizing GDN conferences, and being editor-in-chief of the GDN journal. The scientific discussions and disputes with him were engaging, demanding, sometimes emotional but always fruitful and inspiring. They allow very many of us to excel in research and understand what true science is.

Privately, he was a husband, father, and grandpa, and his passing away is a great loss to his family. But we are sure there are many researchers and teachers from various disciplines and communities that feel now exactly the same. We lost an important member of our family.

Here in N.EA, we will keep you in our memories forever.

Tomasz Wachowicz / N.EA Team