For the first time in seven calendar quarters, senior financial executives in manufacturing, construction, transportation, and other major segments of the U.S. economy believe that interest rates -- and not consumer spending -- will have the greatest impact on the economy during the next six months. However, a survey by the Institute of Management Accountants (IMA), Montvale, N.J., also shows the finance folks continue to have a high level of confidence in the U.S. economy. Several factors -- including an anticipated increase in sales and profits, and improving economic conditions around the world -- figure into their continued confidence, IMA says. The outlook looks to be especially good for firms with 100 to 1,000 employees, the survey suggests. Profit growth at these mid-size firms is projected to increase 11%, compared with 6% at smaller firms, and 4% at larger companies.