ECO404 GDB Fall 2020
ECO404 GDB Fall 2020
Solution:
Single equation models are often used by
firms to forecast demand or sales. But economic relationships are so complex
that require multiple equation models. This is particularly the case in
forecasting macroeconomic variables such as gross national product or demand or
sales of major sectors or industries. Multiple equation models may include only
a few equations or hundreds of them. Consider the following three simple
equation model of the national economy that can be used to forecast the GNP of
the country.
Consumption (C) = a1 + b1GNP + u1 1
Investment (I) = a2+ b2 Profits in previous years + u2 2
Definitional equation
GNP = Consumption (C) + Investment (I) + Government Expenditures (G)
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