@ safari File Edit View History Bookmarks Window Help 3 & ThuMar 28 6:25PM ng.cengage.com 4% MindTap - Cengage Learning & Dashboard BN Y .: CENGAGE [ MINDTAP Q Search this course Module Four Quiz @ X 9 . Efficiency in the presence of externalities e i Sidewalks grant many external benefits on society: increased pedestrian safety, and so on. Therefore, the market equilibrium quantity of sidewalks does not equal the socially optimal quantity. The following graph plots the demand for sidewalks (their private value), the supply of sidewalks (the e T private cost of producing them), and the social value of sidewalks, including both the private value and external benefits. ;1= YRy VK Use the black point (plus symbol) to indicate the market equilibrium quantity. Next, use the purple point (diamond symbol) to indicate the socially optimal quantity. COURSES v @) L4 Supply Study tools (Private Cost) wef Market Equilibrium 9 College Success Tips Career Success Tips Socially Optimal Level Help ' [> sIGN ouT PRICE OF SIDEWALKS Social Value Demand (Private Value) Safari Edit View History Bookmarks Window Help O Q Thu Mar 28 6:25PM ... ng.cengage.com C + DOC Mind Tap - Cengage Learning Dashboard Resun Richard CENGAGE | MINDTAP Q Search this course Module Four Quiz X HOME optimal quantity. PROFILE (? A-Z ORDERS Supply (Private Cost) RENTALS Market Equilibrium EI COURSES Socially Optimal Level PRICE OF SIDEWALKS Study tools bongo College Success Tips Social Value Career Success Tips Demand (Private Value) ? Help QUANTITY OF SIDEWALKS A+ - SIGN OUT ijiii Grade It Now Save & Continue Continue without saving MAR 28 tv 4 IIBII W