41.   The estimates are based on a preliminary agreement.

42.   The estimates are based on the continuation of present government rail policy.

43.   The estimates were based on fourth-quarter figures that were revised down today.

44.   The estimate is based on assessment rates used by local governments.

45.   The estimate was based on collaborations with the U.S. Drug Enforcement Administration and other federal agencies, Morales said.

46.   The estimates are based on early data collected by CDC.

47.   The estimates are based on interviews with studio executives.

48.   The estimate is based on historical information and actual fault slippage, as measured by quake scientists who actually dug trenches and studied the warp of rock and soil.

49.   The estimate is based on the income generated from the securities, plus the capital gains from the equities portion of the convertible, he said.

50.   The estimate was based on a complicated economic model that has been the subject of some debate in economic circles, and in the administration.