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


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