Top Highlights

• Each cell in the matrix repre- sents, by convention, a flow of funds from a column account to a row account.
• The SAM distinguishes between “activities” and ”commodi- ties.” Activities are the entities that produce goods and services, and commodities are those goods and services produced by activities.
• They are separated because sometimes an activity produces more than one kind of commodity (by-products). Similarly, commodities can be produced by more than one kind of activity: for example, maize can be produced by small- or large-scale farmers. The values in the activity accounts are usually measured in producer prices (that is, farm or factory ...
• On their own, the commodity row and column accounts are sometimes referred to as a “Supply–Use Table,” or the total supply of commodities and their different kinds of uses or demands.
• A SAM is different from an input–output matrix because it not only traces the income and expenditure flows of activities and commodities, but it also contains complete information on different institutional accounts, such as households and the government

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