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Show to 1975. The methods used for these projections will be discussed later. Inconsistencies arising from the two methods of handling the Household sector will be analyzed and discussed as they are presented. Given an input- output table, a set of water coefficients and the final demand projections for 1975, the projection of increased water demand is relatively simple and not very time consuming ( if a modern electronic computer is also available). The speed and simplicity of the method allows a very attrac - tive flexibility in its application; i. e., there is no problem in testing several levels of Final Demand for each source and/ or testing these on a sector or sector - grouping basis. The key tool for determining the projection of required changes in total output is the input- output inverse matrix ( the table of direct and indirect requirements per dollar of Final Demand). This is a ( 40 x 40) matrix in the case where household consumption is considered part of Final Demand. This matrix, when multiplied by a column vector of projected final demand changes, yields a column vector of required changes in total output-- the increased output resulting from the projected final demand change. Additional water intake require - ments, on a sector- by- sector basis, are then obtained by multiplying the direct water coefficients, Vi, by the corresponding changes in output. Final demand changes in the Government sectors, in the Capital Formation sector, and in the Household sector were projected at three different levels for the period 1963 to 1975. Exports were projected at only one level, except for the Manufacturing, Retail Trade, and Services sectors, which were projected at two different levels. For all of these projections of final demand categories, various methods were used. The details are given at the end of 40 |