Summary: Still plagued by billions of dollars in contract overpricing despite laws and regulations to prevent it, the Pentagon needs to crack down harder on companies with a history of significant defective pricing or chronic cost-estimating problems. During fiscal years 1987-91, the Defense Contract Audit Agency (DCAA) discovered defective pricing totaling more than $3.6 billion, much of which was linked to subcontracts. Small-dollar contracts involve a particularly high risk of defective pricing. For example, the amount of defective pricing found in audits of subcontracts of $100 million or more averaged 2.9 percent of the subcontract value. In contrast, defective pricing in contracts of less than $10 million averaged 11.2 percent of the subcontract value. While levels of defective pricing continued an upward trend during fiscal years 1987-91, peaking in 1990 at more than $896 million, the frequency with which DCAA spotted defective pricing steadily declined. Defective pricing tends to be concentrated among a relatively small number of contractors--about six percent of these companies accounted for 80 percent of the defective pricing over the five-year period. The following five reports deal with various aspects of this problem.