| | Gasoline Price Pass-through |
 | | In the course of this analysis, EIA has found that the relationships between spot and retail prices are consistent and predictable, to such an extent that changes in spot prices can be used to forecast subsequent changes in retail prices for the appropriate regions. |
 | | Investigation of the time series properties of the price data was performed in order to assist in specifying the form of the forecasting model; for example, data with unit root properties are best analyzed in first differences, whereas stationary series can be estimated in level form. |
 | | Price symmetry (or asymmetry) can be broken into two types: amount symmetry, in which the magnitude of changes at the wholesale and retail level are compared, and pattern symmetry, which is concerned with the speed of pass-through from wholesale to retail. |
| www.eia.doe.gov /pub/oil_gas/petroleum/feature_articles/2003/gasolinepass/gasolinepass.htm (2680 words) |