The literature of economics is expanding rapidly, and many subjects have changed out of recognition within the space of a few years. Perceiving the state of knowledge in fast-developing subjects is difficult for students and time consuming for professional economists. This series of books is intended to help with this problem. Each book gives a clear structure to and balanced overview of the topic, and is written at a level intelligible to the senior undergraduate. They will therefore be useful for teaching but will also provide a mature yet compact presentation of the subject for economists wishing to update their knowledge outside their own specialties.