"[A] remarkably ambitious and largely unprecedented analysis of the philosophical foundations of econometrics... Stigum has made a bold attempt to understand the enterprise of econometrics in its original formulation. It is not only a difficult book, but also a rich and provocative one. No other such work exists. It sets the standard against which any future contribution to the philosophical foundations of econometrics will be judged."--Kevin D. Hoover, Research in the History of Economic Thought & Methodology