This paper addresses the effects of multimarket contact on firms’ ability to collude. Real world imperfections tend to makes firms’ objective function strictly concave and market supergames ‘interdependent’: firms’ payoffs in each market depend on how they are doing in others. Then,...

Peering decisions between Internet Service Providers contain substantial non-measurable aspects requiring trust and informal cooperation among peering partners. We study whether spatial agglomeration is observed between Internet peers. Our empirical analysis of the bilateral peering decisions at...

How many international agreements should there be, and who should sign them? When policy issues are separable, linking them in a ‘grand international agreement’ facilitates policy cooperation by reallocating slack enforcement power. When policy issues are substitutes, issue linkage further...