This paper models frequency of introductions of newer generations of an intermediate-product sold by an upstream 'developer' firm to downstream manufacturer firms. The manufacturers use the intermediate product to manufacture final products, and are heterogeneous in the time it takes them to...

This paper examines the effect of increased product substitutability on quantity-setting firms' ability to sustain tacit collusion in a market. It uses a general demand function and the trigger strategy of Friedman (Friedman JW. 1971. A non-cooperative equilibrium for supergames. Review of...