Despite considerable research that has focused on the attributes associated with evaluating and selecting advertising agencies, and an emerging body of literature emphasizing customer loyalty and retention, advertising agency-client investigations have often analysed these attributes in isolation. This created the need for models that represent the interrelated effects that engender retention and loyalty, especially for services, whereby evaluative as well as relational factors can influence buyer responses. Addressing this gap, this research developed and described the construct of buyer consideration sets to gain a better understanding of business relationships. This is with specific reference to advertising agency replacement considerations in the South African environment. This research contributes to the body of knowledge by providing a more complete, integrated view of customer retention and its determinants. A heuristic model was developed with consideration of theories that originate from the transactional cost theory, social exchange theory and economic and relational contract theories. This model was empirically tested using a mixed method approach. Data obtained from 116 respondents were subjected to factor and correlation analysis to explore the dimensionality of the retention construct. An important contribution of this study is the use of multi-item scales to measure and test retention. This research supports that retention is multidimensional and highlights the limitations of research that measure single factors related to retention. What started as a complex set of relationships has been defensibly and systematically simplified into a parsimonious model. This model postulates that retention is the result of a good working relationship between an advertiser and agency; service satisfaction; respect and support; clear terms of engagement; and conflict resolution. This work also offers insight into the nuances of each of these antecedents and offer new reliable scales for measurement of the items. In management practice, this model will provide advertisers with insights with regards to procurement decisions and supplier management. It can also provide valuable insight to agencies with regard to customer retention management. Findings of this study may also be extended to other high value professional service industries. / Business Management and Entrepreneurship / D. Com. (Business Management)

Despite considerable research that has focused on the attributes associated with evaluating and selecting advertising agencies, and an emerging body of literature emphasizing customer loyalty and retention, advertising agency-client investigations have often analysed these attributes in isolation. This created the need for models that represent the interrelated effects that engender retention and loyalty, especially for services, whereby evaluative as well as relational factors can influence buyer responses. Addressing this gap, this research developed and described the construct of buyer consideration sets to gain a better understanding of business relationships. This is with specific reference to advertising agency replacement considerations in the South African environment. This research contributes to the body of knowledge by providing a more complete, integrated view of customer retention and its determinants. A heuristic model was developed with consideration of theories that originate from the transactional cost theory, social exchange theory and economic and relational contract theories. This model was empirically tested using a mixed method approach. Data obtained from 116 respondents were subjected to factor and correlation analysis to explore the dimensionality of the retention construct. An important contribution of this study is the use of multi-item scales to measure and test retention. This research supports that retention is multidimensional and highlights the limitations of research that measure single factors related to retention. What started as a complex set of relationships has been defensibly and systematically simplified into a parsimonious model. This model postulates that retention is the result of a good working relationship between an advertiser and agency; service satisfaction; respect and support; clear terms of engagement; and conflict resolution. This work also offers insight into the nuances of each of these antecedents and offer new reliable scales for measurement of the items. In management practice, this model will provide advertisers with insights with regards to procurement decisions and supplier management. It can also provide valuable insight to agencies with regard to customer retention management. Findings of this study may also be extended to other high value professional service industries. / Business Management and Entrepreneurship / D. Com. (Business Management)