Some researchers define commitment as a pledge of continuity between exchange partners based on beliefs in the effectiveness of long-term mutual benefits, and portray it as an advanced phase of the relationship (Dwyer, Schurr, and Oh 1987). Within this context, commitment has often been defined simply as the desire to maintain a relationship (Moorman, Zaltman, and Deshpande 1992; Morgan and Hunt 1994) and viewed as a unidimensional concept (e.g. Garbarino and Johnson 1999; Lacy, Suh, and Morgan 2007; Morgan and Hunt 1994).