1.   Consumer spending, which also has driven the economic boom, also cannot continue at its current high rate, Sinai said.

2.   Driving the boom in gourmet chow are pet owners who want the same things for Fido as they do for themselves or their children.

3.   Excess capacity has driven merger booms before.

4.   Individual investors have driven the boom in mutual funds and, in the process, helped push Wall Street to new heights.

5.   In this country, only business can drive that boom.

6.   The boom is being driven by the National Institutes of Health, which, under pressure from Congress, has sharply increased its budget for studies of alternative medicine.

7.   The boom is driven by forces other than anxiety, according to scores of educators, psychologists and parents.

8.   The merger boom is driven in part by the exuberant U.S. economy.

9.   The old rust-belt industries of automobiles, appliances and furniture have been driving the boom, but tax cuts may be reinforcing it.

10.   The primary force driving the boom in toll-free truck tattle lines is money.