Chapter 14 - Imperfect Information: Adverse Selection and Moral Hazard - Exercises - 14.5 The Economics of Consumer Search - Page 336: 5.1

indifferent expected benefit expected cost

reservation price is a good rule for the consumer to decide when to stop searching for a lower price. The reservation price is the price at which the consumer is $\textbf{indifferent}$ about additional search, meaning that the $\textbf{expected benefit}$ of search equals the $\textbf{expected cost}$.