Soumajyoti Sarkar

I recently obtained my PhD in computer science at the Arizona State University, Tempe. I was advised by Paulo Shakarian and my thesis focused on measuring the impact of social network interactions using observational and experimental studies. I am an engineer and researcher in the fields of search and recommendations at Twitter and an independent researcher in the field of decision making in peer lending platforms. I currently live in and work remotely from San Francisco, California. I finished my undergraduate studies at the Indian Institute of Engineering Science and Technology (IIEST), Shibpur.

Outside of academia, I've been fortunate to have had the opportunity to work with a bunch of amazing people through my internships at Nokia Bell Labs as part of the ENSA team at Murray Hill, New Jersey, the Twitter Search team at their San Francisco HQ and the Search Science team of Amazon Research (A9) at their Palo Alto office.

Please feel free to reach out to me using my email (link below) on anything related to my research or any collaborations.

Email  /  Google Scholar

Interests

I'm interested in modeling the mechanisms of information spreading or diffusion in online platforms but I go beyond that to now use these models for various predictive applications. Recently, I have grown significant interest in the applications of incentives, influence and bandits in matching markets for peer lending. I spend quite a large part of my time outside of work here and here. I also occasionally enjoy playing outdoor soccer.

Selected Publications/Preprints (First-authored)

Use of a controlled experiment and computational models to measure the impact of sequential peer exposures on decision making
Soumajyoti Sarkar, Paulo Shakarian, Mika Armenta, Danielle Sanchez, Kiran Lakkaraju
PLOS One 2020 (Journal)
Abstract accepted for presentation at the Network Science in Economics Conference, University of Chicago, 2020.
pdf / Appendix / link

Mitigating Bias in Online Microfinance Platforms: A Case Study on Kiva.org
Soumajyoti Sarkar, Hamidreza Alvari
ECML-PKDD, AI for Social Good (Oral Presentation)
Also presented at the Workshop on ML in Finance, KDD 2020
 
pdf / link / slides

Centralized borrower and lender matching under uncertainty for P2P lending
Soumajyoti Sarkar
Shorter version presented at FinWeb Workshop, WWW 2021   (Oral Presentation)
Shorter version / Longer (arxiv) version / slides

Impact of Social Influence on Adoption Behavior: An Online Controlled Experimental Evaluation
Soumajyoti Sarkar, Ashkan Aleali, Paulo Shakarian, Mika Armenta, Danielle Sanchez, Kiran Lakkaraju
IEEE/ACM Advances in Social Networks Analysis and Mining (ASONAM) (Oral Presentation) , Canada, 2019  
pdf / Appendix / link / slides / media

Leveraging Motifs to Model the Temporal Dynamics of Diffusion Networks
Soumajyoti Sarkar Hamidreza Alvari, Paulo Shakarian
MSM Workshop, The Web Conference (WWW) (Oral Presentation) , San Francisco, 2019  
pdf / Appendix / link / slides

Understanding and forecasting lifecycle events in information Cascades
Soumajyoti Sarkar, Ruocheng Guo, Paulo Shakarian
Springer Social Network Analysis and Mining (SNAM) (Journal) , 2017  
pdf / Appendix / link / slides

Predicting enterprise cyber incidents using social network analysis on the darwkeb hacker forums
Soumajyoti Sarkar, Mohammad Almukaynizi, Jana Shakarian, Paulo Shakarian
International Conference on Cyber Conflict. (CyCon U.S.) (Oral Presentation) , Washington D.C., 2018  
pdf / Appendix / link / slides

Using network motifs to characterize temporal network evolution leading to diffusion inhibition
Soumajyoti Sarkar, Ruocheng Guo, Paulo Shakarian
Springer Social Network Analysis and Mining (SNAM) (Journal) , 2019  
pdf / Appendix / link / slides

Mining user interaction patterns in the darkweb to predict enterprise cyber incidents
Soumajyoti Sarkar, Mohammad Almukaynizi, Jana Shakrian, Paulo Shakarian
Springer Social Network Analysis and Mining (SNAM) (Journal) , 2019  
pdf / link / slides

Understanding Information Flow in Cascades Using Network Motifs
Soumajyoti Sarkar, Hamidreza Alvari, Paulo Shakarian
International Conference on Social Computing, Behavioral-Cultural Modeling (SBP) (Poster) , Washington D.C., 2019  
pdf / link

Can social influence be exploited to compromise security: An online experimental evaluation
Soumajyoti Sarkar, Paulo Shakarian, Mika Armenta, Danielle Sanchez, Kiran Lakkaraju
IEEE/ACM Advances in Social Networks Analysis and Mining (ASONAM) (Oral Presentation) , Canada, 2019  
pdf / link / slides

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