21.   He has heard reports of Leno sightings at auctions, hat pulled down, jacket collar rolled up, as he quietly bid up the prices.

22.   In doing so, the government is creating a shortage of Treasury bonds, driving up the price of those bonds and driving down the interest rate they carry.

23.   In Moscow, that would have merely upped the price.

24.   In fact, soaring energy costs have delivered a double whammy by driving up the price of both fertilizer and equipment fuel.

25.   In order to make exploration profitable, the industry drives up the price of its commodity.

26.   Limiting the supply of something increasingly in demand generally has the effect of driving up its price.

27.   Mayer, who hated Gilbert for cluing Garbo in to her importance and driving up her price, bided his time, and destroyed Gilbert.

28.   More important, the bullish advertising market for all of network television is driving up the prices for commercials on the newscasts, even with their diminished ratings.

29.   Moreover, because the error had made demand appear to be higher than it was, it drove up the price.

30.   Oil-producing countries have cut back production, driving up the price of gasoline and heating oil.