In 1976, volume 116 of the Lecture Notes in Economics and Mathematical
Systems appeared in the library of the University of Illinois. The title
of the book, Input-Output Analysis and the Structure of Income
Distribution was sufficiently intriguing to one of the present editors
(Hewings) to command attention. Some years later, during the First World
Congress of the Regional Science Association in Cambridge Massachusetts
in 1980, Madden and Batey presented some of their work using their now
familiar demographic-economic modeling system. Discussion ensued about
the relationship between this system, Miyazawa's formulation and the
social accounting matrices most closely associated with the work of
Stone. During a year's residence at the University of Illinois, Batey
was able to produce a valuable typology of multipliers that began the
process of integrating these several modeling systems into a coherent
package. Thereafter, a number of regional scientists have exploited the
ideas and insights proposed by Miyazawa, especially the notion of the
interrelational income multiplier and the ideas of internal and external
multipliers.