Przemyslaw A. Grabowicz

Hello, World! I am a Research Assistant Professor at the College of Information and Computer Sciences of UMass in Amherst. 

My research contributes statistical methods to understand and augment social behavior in the systems of our information society. The ambition of my research is to develop a mathematical understanding of fundamental social processes and to design fair and efficient social computing systems.

Email: przemyslslaw (a google mail account)
Work phone: +49 681 9303-8626


  • Zijian Wang, Scott Hale, David Ifeoluwa Adelani, Przemyslaw Grabowicz, Timo Hartman, Fabian Flöck and David Jurgens
  • Demographic Inference and Representative Population Estimates from Multilingual Social Media Data, WWW'19, arxiv, code & data(best poster presentation award, long paper)

  • J. Proskurnia, P.A. Grabowicz, R. Kobayashi, C. Castillo, P. Cudre-Mauroux, K. Aberer,
    Predicting the Success of Online Petitions Leveraging Multidimensional Time-Series,
    WWW'17, 2017, pdfdata

  • P.A. Grabowicz, N. Ganguly, K.P. Gummadi
    Distinguishing between Topical and Non-topical Information Diffusion Mechanisms in Social Media
    AAAI ICWSM'16, 2016,
    arxiv, data

  • P.A. Grabowicz, M. Babaei, J. Kulshrestha, I. Weber
    The Road to Popularity: the Dilution of Growing Audience on Twitter
    AAAI ICWSM'16, 2016
    , arxiv, data

  • C.A. Davis et al.
    OSoMe: The IUNI observatory on social media
    PeerJ Computer Science 2:e87, 2016, peerj

  • M. Babaei, P.A. Grabowicz, I. Valera, K.P. Gummadi, M. Gomez-Rodriguez
    On the Efficiency of the Information Networks in Social Media
    ACM WSDM'16, 2016, pdf

  • P.A. Grabowicz, N. Ganguly, K.P. Gummadi
    Microscopic Description and Prediction of Information Diffusion in Social Media: Quantifying the Impact of Topical Interests
    WWW'15 Companion, 2015, pdf, data

  • M. Babaei, P.A. Grabowicz, I. Valera, M. Gomez-Rodriguez
    On the Users’ Efficiency in the Twitter Information Network
    AAAI ICWSM'15, 2015, pdf

  • P.A. Grabowicz,  L.M. Aiello, F. Menczer
    Fast filtering and animation of large dynamic networks
    EPJ Data Science, 3(1), 27, 2014, epj
    , code, data

  • D. Martin-Borregon, L. Aiello, P.A. Grabowicz, A. Jaimes, R. Baeza-Yates
    Characterization of online groups along space, time, and social dimensions
    EPJ Data Science, 3(1), 8, 2014, epj

  • P.A. Grabowicz, J.J. Ramasco, B. Goncalves, V.M. Eguiluz
    Entangling mobility and interactions in social media
    PLoS ONE 9(3): e92196, 2014, plosone

  • L. Chiarandini, P.A. Grabowicz, M. Trevisiol, A. Jaimes
    Leveraging Browsing Patterns for Topic Discovery and Photostream Recommendation

    AAAI ICWSM'13, 2013, pdf
  • P.A. Grabowicz, L.M. Aiello, V.M. Eguiluz, A. Jaimes
    Distinguishing Topical and Social Groups Based on Common Identity and Bond Theory

    ACM WSDM'13, 2013, arxiv

  • P.A. Grabowicz, J.J. Ramasco, V.M. Eguiluz
    Dynamics in online social networks,
    In Dynamics On and Of Complex Networks, Volume 2, 2013, arxiv

  • P.A. Grabowicz, J.J. Ramasco, E. Moro, J. Pujol, V.M. Eguiluz
    Social features of online networks: the strength of intermediary ties in online social media
    PLoS ONE 7(1): e29358, 2012, plosone

  • P.A. Grabowicz, V.M. Eguiluz
    Heterogeneity shapes groups growth in social online communities
    EPL 97 28002, 2012, arxiv

  • D. Stauffer, P.A. Grabowicz, J.A. Holyst
    Opinion Dynamics with Hopfield Neural Networks
    arXiv:0712.4364v2, 2008, arxiv

: equal contribution

Grants and awards:

  • Project "Current Affairs 2.0: Agenda Setting in the European Union"

    Grant from Volkswagen Foundation for Computational Social Science for 2017-2021 (€843k)

    Przemyslaw A. Grabowicz, Scott Hale, Fabian Flöck, David Jurgens

  • WICI Data Challenge main prize recipients ($10k)
    Przemyslaw A. Grabowicz,  Luca Maria Aiello, Fil Menczer
    Real-time visualization of relevant portions of large dynamic 

Press coverages:

  • El Mundo, El 'oráculo' de los bytes, 2013,, pdf
  • El Mundo, Los entresijos de Twitter, 2011,
  • Various for the Truthy project, truthy