LExL: A Learning Approach for Local Expert Discovery on Twitter
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© Springer International Publishing Switzerland 2016. In this paper, we explore a geo-spatial learning-to-rank framework for identifying local experts. Three of the key features of the proposed approach are: (i) a learning-based framework for integrating multiple factors impacting local expertise that leverages the fine-grained GPS coordinates of millions of social media users; (ii) a location-sensitive random walk that propagates crowd knowledge of a candidate’s expertise; and (iii) a comprehensive controlled study over AMT-labeled local experts on eight topics and in four cities. We find significant improvements of local expert finding versus two state-of-the-art alternatives.
author list (cited authors)
Niu, W., Liu, Z., & Caverlee, J.
editor list (cited editors)
Ferro, N., Crestani, F., Moens, M., Mothe, J., Silvestri, F., Nunzio, G., Hauff, C., & Silvello, G.