Baffling to builders and Dun and Bradstreet alike are the increasing number of construction firms that go out of business each year- despite a record high in construction activity. What makes building contractors twice as venerable as his fellow businessman to the storm and stress of our competitive economy? The answer, according to Dun and Bradstreet, is stiff competition linked with weakness inherent in his own business practices. The weaknesses are inexperience, either with the nature and problems of the construction industry or with sound business practices, underbidding, or taking on jobs with no examination of actual costs involved and the relation of these costs to a sound bid that includes a fair profit, and overextension, or taking on jobs for which there is inadequate capital on hand to back the investment.