Using the postal service as an example, this article highlights the critical role played by a series of “implicit” judgments when estimating the government earnings differential. Regression estimates demonstrate that alternative treatments of location, gender, industry, occupation and union...

The existence and the use of the essential facilities doctrine was questioned in theory and in practice. Although the doctrine was developed in antitrust, it became a frequently cited notion in the regulation of network utilities. Its relevance is hotly debated during the setup of the new...