In this note, we extend the Goyal and Joshi's model of network of collaboration in oligopoly to multi-market situations. We examine the incentive of firms to form links and the architectures of the resulting equilibrium networks of this setting. We also present some results on efficient networks.

The structural and magnetic properties of <InlineEquation ID="Equ4"> <EquationSource Format="TEX">$\gamma$</EquationSource> </InlineEquation>-Fe<Subscript>2</Subscript>O<Subscript>3</Subscript> nanoparticles dispersed on silica spheres prepared by sol-gel method were investigated. The properties of <InlineEquation ID="Equ5"> <EquationSource Format="TEX">$\gamma$</EquationSource> </InlineEquation>-Fe<Subscript>2</Subscript>O<Subscript>3</Subscript> nanoparticles without silica were compared with those on silica spheres. Both the nanoparticle assemblages were...</subscript></subscript></equationsource></inlineequation></subscript></subscript></equationsource></inlineequation>

We consider a multimarket framework where a set of firms compete on two oligopolistic markets. The cost of production of each firm allows for spillovers accross markets, ensuring that output decisions for both markets have to be made jointly. Prior to competing in these markets, firms can...