Price comparison websites are commonly thought to benefit consumers by increasing competitive pressure between firms, in turn lowering prices faced by consumers. This article investigates the impact of the introduction of a PCW or ‘web aggregator’ to the market for a homogeneous good. We...

This paper compares standard and local projection techniques in the production of impulse response functions both theoretically and empirically. Through careful selection of a structural decomposition, the comparison continues to an application of US data to the textbook ISLM model. It is argued...