Language Modelling for Collaborative Filtering: Application to Job Applicant Matching
Résumé
This paper addresses a collaborative retrieval problem , the recommendation of job ads to applicants. Specifically, two proprietary databases are considered. The first one focuses on the context of unskilled low-paid jobs/applicants; the second one focuses on highly qualified jobs/applicants. Each database includes the job ads and applicant resumes together with the collaborative filtering data recording the applicant clicks on job ads. The proposed approach, called LAJAM, focuses on the semi-cold start recommendation problem of recommending new job ads to known applicants. This setting is relevant to the temporary job sector, of increasing importance for current job markets. LAJAM learns a continuous language model on the job ad space, trained to comply with the collaborative filtering metrics. This language model, implemented as a neural net, can flexibly take into account heterogeneous additional information, e.g. related to the posting time and geolocation of the job ads. The merits of the LAJAM approach are demonstrated comparatively to the state of the art on the thoroughly studied CiteULike database. The comparison of the public CiteULike database with the proprietary databases sheds some light on the specific difficulties of the job applicant matching problem.
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