Final answer:
Dual agency in real estate refers to when a single broker represents both the buyer and the seller, which is viewed as troublesome due to potential conflicts of interest.
Step-by-step explanation:
Dual agency in the context of real estate refers to when a single broker represents both the buyer and the seller in a transaction. This is viewed as troublesome by many observers because it raises concerns about a conflict of interest. It is questionable whether a broker can effectively 'stand in the shoes' of both the buyer and the seller, as their interests may be conflicting.