We examine the market power of a seller who repeatedly offers upgraded versions of a product. In the case of pure monopoly, the seller also controls compatibility across versions. In the case of an entrant who offers an upgrade, the incumbent seller also controls subsequent interoperability...

We analyze the general-equilibrium effects of alternative regimes of access rights over renewable natural resources – namely, open access versus full property rights on the pace of development when economic growth is endogenously driven by both horizontal and vertical innovations. Resource...