Incentives covered include grants, tax credits, loans, rebates, regulatory exemptions, fuel discounts, and technical assistance.

Examples of these include tax breaks, tax reductions, tax exemptions, rebates, loans and specific funding.

They included rebates for meeting growth targets and for offering a full range of Coke products, and payments for exclusivity.

The arrangements, which include rebates from the drug companies to the managers for giving preference to certain drugs, would become much more visible.

The General Motors Corporation's Chevrolet and Oldsmobile divisions announced new incentive programs that include increased rebates on certain models.

Software can include rebates for $5 to $20, while printer and scanner manufacturers might offer $50 back on a $149 product.

He said both studies were incomplete by failing to include rebates that drug makers give distributors.

Chrysler, in the meantime, moved to a less-potent plan that included scattered rebates varying by state and model, as well as a seven-year, 100,000-mile power train warranty.

The incentives offered by the three companies, which include rebates and reduced-interest loans, are roughly comparable, although Chrysler alone is offering no-interest loans.

These include discount coupons, rebates, bulk and quantity pricing, seasonal discounts, and frequent buyer discounts.