In finance research, it's a major victory if you can explain half of one per cent of the price variation with your model.

Coffee is an example of a product that has been susceptible to significant commodity futures price variations.

The problem was that instead of basing the price variations on market conditions, Amazon charged customers randomly.

Normally it does not include the price variations, at the difference of the total return.

The range of price variations was enormous and contracts were tailored for each client.

So there can be a lot of individual price variations within a housing market.

This is comparable to the price variation in airline tickets.

That is because the bureau makes adjustments in the index's components to reflect seasonal price variations.

The system provided social stability yet by 1750 needed to be adapted to cope with population increases, greater mobility and regional price variations.

If you book well enough in advance, however, it's possible to escape the seasonal price variations.