We consider a country whose government provides a bundle of goods and services through a multi-tier administrative organization. We compare the optimal architectures of public governance (i.e. the division of the state into several tiers, the distribution of services among them, their number of...

Biotic factors such as pests create biodiversity effects that increase production risks and decrease land productivity when agriculture becomes more specialized. We show in a Ricardian two-country trade setup that production specialization is incomplete under free trade because of the decrease...