Paper in a Day fosters collaborations between young researchers from around the world, stimulating connections and exchange of ideas by working on a tangible outcome: a brief paper or commentary for a peer-reviewed journal.  This year, Paper in a Day at ESTSS will make use of a unique research resource - the PACT/R Data Archive,  Interested participants should apply by 15 April 2019 (seats are limited; first come, first serve).