This question is challenging. Usually, we see research on sales person attributes and their correlation with brand success. Moreover, the brand's performance is usually extracted from questions of sales performance, because the research question is usually attending to attributes of the sales person or the market. Ideally, you need to search for research where sales persons working for a parent company sell multiple brands simultaneously, and then think about a research design from that starting point. If you look to Nielsen Reports for Unilever etc., you can see that in companies where sales persons all meet their KPIs (and they must meet their KPIs), and they sell multiple brands, that brands differ in market share quarter on quarter, and year on year. In fact some KPIs change quarter on quarter for sales persons depending on brand-marketing drives and sales initiatives. Perhaps take a look at some papers in the Journal of Marketing, e.g., http://journals.ama.org/doi/abs/10.1509/jmkg.74.4.81?code=amma-site

Thank you very much.. Michelle B. Cowley

I would suggest to contact Harish Sujan, Tulane Univ expert in research on salespersons performance. I guess he can help you

Thank you Mr. T. M. M. Verhallen Sir for your concern.

To what brand do you refer to?

Do you mean customer identification with the brand or salespeople identification?

Thank You Paulo Durate Sir for your concern. My question is related to Brand Identification for the salespeople and its impact on their performance.

take a look at the attached  file 

Thank you very much Amir Ekhlassi

Saurabh Mishra Although its one year old question, still if you are looking for articles I hope you will find it useful.

Article Customer-based brand equity and firms' performance in the te...

Muhammad Farooq Thanks a lot