71.   All of which pushes up prices.

72.   Also pushing prices lower, Colonial Pipeline Co. said it would allow shipments of heating oil and other distillate fuels through a pipeline normally reserved for gasoline.

73.   All this is happening as the world economy hums along with high demand pushing up prices of oil and copper.

74.   All of which has acted to push up prices.

75.   Brown said manufacturing remains a weak link in the economic chain, with the much industrial capacity available to meet any increase in demand without pushing prices higher.

76.   Bundesbank council members said they were concerned that a rapid fall in the value of the mark would push German prices higher.

77.   But at least in the short-term, it has made it easier for companies to push up prices.

78.   But a year later, according to Valero, stockpiles were at historically low levels, which pushed prices up.

79.   But further increases might push the prices of entry-level homes out of reach for first-time buyers.

80.   But in exchanges in which there are few sellers and many buyers, the availability of timely price information may well have the opposite effect, pushing up prices.