The authors examine the effect of relational constructs (e.g., satisfaction, trust, and affective and calculative commitment) Relationship age has been of interest to relationship marketing researchers for some years now. In a number of studies, the effect of age of the relationship on the level of trust, commitment, and relationship performance has been examined (Anderson and Weitz 1989;Brown, Lusch, and Nicholson 1995;Doney and Cannon 1997;Ganesan 1994; Kumar, Scheer, and Steenkamp 1995a). These studies report mixed results on the effect that age has on these variables. Only recently have studies investigated the moderating effect of relationship age on the effect that relational constructs, such as trust, satisfaction, and commitment, have on relationship outcomes. These moderating effects are of particular interest from a theoretical and managerial perspective. Theoretically, because longer relationships are qualitatively different from shorter ones, there is a value in research that focuses on the differences between short-and long-term relationships (Grayson and Ambler 1999). Moreover, a study on the moderating effects of relationship age might suggest explanations for diverging findings with regard to the effect of relational constructs on relationship performance (e.g., Doney and Cannon 1999; Gruen, Summers, and Acito 2000; Verbeke, Veldkamp, Bagozzi, and Farris 1999). From the point of view of management, knowledge on how short-and longterm relationships differ can help managers to develop specific strategies for both relationship types. Gaining such knowledge is relatively easy since customer information files can be used to determine this age (Blattberg, Glazer, and Little 1994).Various studies have considered the time-dependent effect of relational constructs. Bolton (1998) reported that the positive effect of customer satisfaction on relationship duration with a telephone service provider increased with relationship age. Grayson and Ambler (1999) showed that trust solely affected clients' use of services of an