In the memorable words of Ragnar Frisch, econometrics is 'a unification of the theoreticalquantitative and the empiricalquantitative approach to economic problems'. Beginning to take shape in the 1930s and 1940s, econometrics is now recognized as a vital subdiscipline supported by a vast-and still rapidly growing-body of literature. Edited by a leading researcher in the history of econometrics, this new collection from Routledge's Critical Concepts in Economics series brings together in one 'mini library' the best and most influential scholarship on the rise of econometrics. The set provides an authoritative one-stop resource to enable users to understand what has shaped econometrics into its current form. With a full index and comprehensive introductions to each volume, newly written by the editor, the collection also provides a synoptic view of many current key debates and issues.