61.  OPEC has hoped that as world demand increases, tight supplies will push up prices.

62.  Part of the problem is caused by tight supplies.

63.  Petrochemicals have seen strong demand and tight supplies caused by shortages in capacity for some basic products like polyethylene.

64.  Petroleum prices were buoyed by forecasts of increased demand and tight supplies, analysts said.

65.  Petroleum prices were buoyed during the quarter by forecasts of increased demand and tight supplies, analysts said.

66.  Others worry that Iraq, always unpredictable, might use the tight supply situation to its advantage in coming months, as winter approaches.

67.  Petroleum prices in the fourth quarter were buttressed by tight supplies and forecasts for increased demand.

68.  Pork prices rose recently amid tight supplies.

69.  Prices were buoyed in recent weeks by expectations of tight supplies.

70.  Price moves will need to be large to lure farmers to plant land in times of tight supplies or idle acres when bins are bursting with grain.