This problem is compounded if various extrapolated ideal prices used to guide economic actors rely on observed trends in real prices which fluctuate a great deal in ways that are difficult to predict .
If the predictions made themselves influence price levels .
This problem is compounded if various extrapolated ideal prices used to guide economic actors rely on observed trends in real prices which fluctuate a great deal in ways that are difficult to predict , and if the predictions made themselves influence price levels .