Constitution-making is a ubiquitous but poorly understood phenomenon. There is much speculation but relatively little evidence about the impact of different design processes on constitutional outcomes. Much of the debate reduces to the question of who is involved in the process and when. We consider two central issues in this regard. The first is the problem of institutional self-dealing, or whether governmental organs that have something to gain from the constitutional outcome should be involved in the process. The second has to do with the merits of public involvement in the process. Both of these concerns have clear normative implications and both are amenable to straightforward social scientific analysis. This article surveys ...