Difference equations are one of the branches of mathematics that is of great applied importance. In addition to general mathematical and theoretical interest, difference equations have a wide practical
application. In particular, when solving problems related to the economy. Difference equations can be used to describe many processes of macroeconomic dynamics. For example, population growth (in the period under consideration), price growth dynamics, advertising distribution process, the production volume of a certain manufacturer, etc.
In practice, situations often arise when the production cycle of a product lags behind the cycle of its implementation. This is typical for agriculture, for example. And in industrial production, the proposal is formed on the basis of the price in the previous period of time. Thus, the supply function S is time-shifted relative to the price P, i.e. we will assume that S (t) = S (P (t - I)), while the demand function D immediately corresponds to the price: D (t) = D (P (t))
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