Before revision: Many real-world problems such as salesand healthcare regulation involve a principal, multiple intermediaries, and agents with hidden characteristics. In these problems, intermediaries compete through offering menus of multifaceted consumption bundles to agents, whereas the principal is limited to regulating sub-aspects of the sold bundles by legal , informational and administrative barriers.
After revision: We examine problems of "intermediated implementation." An example is sales, whereby retailers compete through offering menus of multifaceted consumption bundles to agents, whereas the principal is limited to regulating sub-aspects of the sold bundles by legal , informational and administrative barriers.