Parton Distributions Working Group
  The main focus of this working group was to investigate the different issues associated with the development of quantitative tools to estimate parton distribution functions uncertainties. In the conclusion, we introduce a "Manifesto" that describes an optimal method for reporting data. 
L. de Barbaro, E.L. Berger, R. Brock, D. Casey, R. Demina, W.T. Giele,   R. Hirosky, J. Huston, J. Kalk, S.A. Keller, M. Kla...