I am developing an open textbook for an econophysics course I am teaching. Right now my students are writing two of the seven planned chapters for the open textbook (as part of their continual assessment). In the future I would like to welcome contributions from anyone who finds the open textbook useful, but I would like to retain editorial control over it. Any suggestions on which licensing scheme is most appropriate? Clearly I need to know this before the open textbook goes live in a few weeks' time.