Public procurement is big business. International organizations and governments at national, regional, state anmd city levels are major buyers of goods and services. However, public procurement is a relatively under-researched and new discipline which, uniquely, brings together contributions from the fields of economics and law. This two-volume set presents some of the major contributions in the field. It includes papers on outsourcing versus internal provision; public procurement and the role of competition and transparency; corruption; public procurement as a tool of industrial, social and environmental policy; public procurement as a trade barrier and its regulation under international trade agreements; and enforcing public procurement rules.