Already, higher gas prices have cost the average family about $500 a year.

Some are already coming due to low natural gas prices.

Is it any different from the way gas prices are set?

The high gas prices are not enough to keep some from going back to their cars.

Natural gas prices are up 16 percent so far in June.

Or to gas prices that change only once a day?

That's not much of a problem when gas prices are low.

California, in particular, already has much higher gas prices than other parts of the country.

But gas prices have been kept far below world levels.

Gas prices have an impact on other parts of the economy as well.