\item {[Lecture]} “The Growth and Decline of Digital Knowledge Commons.” Knight Foundation Retreat, Center for Advanced Studies in the Behavioral Sciences, Stanford University, Palo Alto, California, May 30, 2019.
\item {[Lecture]} “The Growth and Decline of Digital Knowledge Commons.” Bloomberg Beta Dinner Gathering, Center for Advanced Studies in the Behavioral Sciences, Stanford University, Palo Alto, California, May 7, 2019.
\item {[Lecture]} “State of Wikimedia Research 2017-2018.” With Tilman Bayer, Reem Al-Kashif, and Mohammed Sadat Abdulai. Wikimania 2018, Cape Town, South Africa, July 21, 2018.
\item {[Lecture and Q\&A]} ``Whither Peer Production?'' Vall de Can Masdeu, Barcelona, Catalonia, Spain, June 3, 2018.
\item {[Lecture]} “Free Software Needs Free Tools.” OpenDev Summit, OpenStack Conference, Vancouver Convention Center, Vancouver, BC, Canada, May 22, 2018.
\item {[Lecture]} “The Growth and Decline of Digital Knowledge Commons.” Knight Foundation Retreat, Center for Advanced Studies in the Behavioral Sciences, Stanford University, Palo Alto, California, May 30, 2019.
\item {[Lecture]} “The Growth and Decline of Digital Knowledge Commons.” Bloomberg Beta Dinner Gathering, Center for Advanced Studies in the Behavioral Sciences, Stanford University, Palo Alto, California, May 7, 2019.
\item {[Lecture]} “State of Wikimedia Research 2017-2018.” With Tilman Bayer, Reem Al-Kashif, and Mohammed Sadat Abdulai. Wikimania 2018, Cape Town, South Africa, July 21, 2018.
\item {[Lecture and Q\&A]} ``Whither Peer Production?'' Vall de Can Masdeu, Barcelona, Catalonia, Spain, June 3, 2018.
\item {[Lecture]} “Free Software Needs Free Tools.” OpenDev Summit, OpenStack Conference, Vancouver Convention Center, Vancouver, BC, Canada, May 22, 2018.