Over the last decades, technological progress has brought about a multitude of standardization problems. For instance, compatibility standards ensure the interoperability of goods, which is of decisive importance when users face positive externalities in consumption. Consumers' expectations are...

We study active labor market policies (ALMP) in a matching model. ALMPs are modelled as a subsidy to job search. Workers differ in their productivity, and search takes place along an extensive margin. An additional job seeker affects the quality of unemployed workers. As a result, the Hosios...