This paper analyzes consumer, retailer and manufacturer preferences for and use of two important risk reduction tools: money-back guarantees and demonstrations. Theoretical findings from economics, marketing, consumer behavior and psychology are integrated to analyze the performance of these mechanisms under various conditions and product characteristics. The paper investigates the relationship between these two risk reduction mechanisms and reveals in which ways the two are complements or substitutes, identifying under which conditions money-back guarantees and demonstrations will be used separately, together, or not at all. (C) 2001 Elsevier Science Inc. All rights reserved.