http://www.informaworld.com/smpp/ftinterface?content=a739142631&rt=0&format=pdf

A Causative Matrix Approach to Interpreting Structural Change
Randall W. Jackson;  Peter Rogerson;  David Plane; Breandan O. Huallachain
Economic Systems Research, 1469-5758, Volume 2, Issue 3, 1990, Pages 259 – 269

谢谢，求助啊