Roy L. Nersesian challenges traditional forecasting methods that
rely strictly on econometric models, arguing that they ignore a
fundamental aspect of the business cycle--human emotional responses
to economic stimuli. Nersesian advocates instead the development of
forecasting models that incorporate human behavior into the
process, and he provides a tool--computer simulation--which can be
used for this purpose. As Nersesian demonstrates, such consumer
attitudes as confidence in the future, fear of depression, even
passing fads can have a profound effect on business activity and
are often far more predictive of the future than are the thousands
of mathematical equations used to develop a forecast built upon
econometrics. By using simulation to factor potential consumer
responses into the forecasting process, Nersesian is able to tie
forecasting to the consequences of human behavior and thereby
determine the way in which attitudes play a role in affecting the
future course of business.
Nersesian's study is organized around a series of questions
about the business cycle: If economic activity is influenced by the
nature of decisions, and if decisions are based partly on human
responses to such things as prices and costs, and partly on human
emotions, shouldn't the forecasting process itself incorporate
human behavior? If human behavior in turn is influenced by factors
such as price, cost, and inventory, and the general level of
confidence in the future, should these not be incorporated in the
forecasting process? In order to address these questions, Nersesian
creates a simple island society and demonstrates how to use
simulation to assess the effects of elements that might cause a
change of consumer sentiment during the forecast period. As
Nersesian concludes, a change of consumer sentiment at any time
during the forecast period can have significant implications for
the accuracy or usefulness of a forecast used in the corporate
planning process. Both students of forecasting and corporate
planners will find Nersesian's work illuminating reading.
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