Human Behavior at Auctions: From the Latest Theory to the Winning Method of Online Auctions

Do you know why the winning bid is the second price (a little higher) in online auctions?
Auctions that have become familiar on the Internet have their own mechanisms and theories. This book provides an easy-to-understand explanation of "auction theory," which is a hot field in economics. How the latest theory analyzes bidding behavior by making full use of game theory, behavioral economics, and experimental economics, what is the winning method of online auction that can be understood from economics?
The appendix also contains the mathematical commentary needed for the latest theory. It is a book that can be widely learned from users of online auctions to students and teachers.