I agree this is a central issue. Authorship is fundamental to the operation of the university from the grading of student-authored essays to the granting of tenure for faculty-authored research. How much time can I devote to this kind of writing when I know no one will validate my work? How can I convince my students to work in this way or convince them of the validity of my evaluation of their labor when their individual work is so difficult to untangle from their peers? In part I think the answer to these challenges begins with recognizing the difference and relationship between the marketplace function of the author-as-owner and a more material-technological understanding of the networked practices of composition.