The regional sales manager for a large chain of men's clothing stores asks you to establish whether increasing her salesperson's commission will result in better sales performance. Specifically, she wants to know whether increasing the commission on limited lines of clothing will result in better sales on these lines but with the penalty of fewer sales on the remaining lines, and whether raising the commission on all lines will produces greater sales on all lines. Suppose that you think that the best way to investigate the issue is through a field experiment in which some salespeopie receiye increased commission on single line, others reoeiye increase commission across the board, and still others make up a control group, whose members receive no increase in commission. - Are there ethical problems inherent in such a design? - How can you negate the ethical problems