The electronic version of Sharing can be downloaded from the OAPEN library (just click on the OAPEN logo), as well as from Amsterdam University Press. It can be used under the terms of the CC-By-NC-ND license. If you redistribute the text of Sharing, we will appreciate your providing us information about this redistribution and if possible access statistics. This will help our study of hybrid publishing models by making possible to compare on-line access and paper sales. Providing this information is in no way a requirement: you are entitled to copy and redistribute the text of Sharing under the sole requirements of the CC-By-NC-ND license.