Review of recent top-quark LHC combinations
  A review of recent combinations of top-quark measurements performed at the LHC, by the ATLAS and CMS collaborations, is provided. The typical uncertainty categorisations, and their assumed correlation patterns are presented, together with the results of the combinations of the top-quark pair and single top-quark production cross sections, the top-quark mass, as well as of the $W$ boson polarisation and the charge asymmetry in $t\bar t$ events. 
Giorgio Cortiana (on behalf of the ATLAS and CMS collaborations within   the TOPLHCWG)
hep-ex