Why do rulers play by the rules? We show that the legality requirement under the rule of law implements an endogenous enforcement mechanism supporting constitutionality. Agents which do not obey unconstitutional legal norms are not sanctioned under constitutional rule. A principal who defects...

We use a Stackelberg differential game to model trade in renewable resources between a monopsonistic buyer and a monopolistic seller. The buyer uses unit and ad valorem tariffs to indirectly encourage conservation of the resource under study. First, we show that the efficacy of these tariffs in...