Michael Sonis and Geoffrey Hewings Theories and Their Multiplier Effect on the Brazilian Economy

It is hard to think about the contributions of Michael Sonis to Input-Output Analysis without taking into consideration his joint work with Geoffrey Hewings. Both are linked together into a type n, n → ∞, multiplier of theory and knowledge. This paper makes a brief presentation of the various theories developed by Sonis and Hewings that gave a new meaning to the word input-output analysis, giving a revival on the use of input-output analysis to study the Brazilian economy. From the Fields of Influence approach to the Pure Linkages analyses, passing through the various decompositions, the Landscapes, and many other techniques, there is a great deal of researchers and academics working with these theories, making it possible to have a better understanding of the productive structure of Brazil and its regions