The fourth edition has benefited drom the comments and and suggestions from students, faculty, and practitioners from around the wrod.The implemented changeds can be divided unte three categories: an update of dataand caes examples, the additionof two chapters related to content that was not previously covered in the book, and an overall streamliningof the exposition of the existing content.The word has changed again between this and the previous edition . Ride sharing, apartment sharing, and electric vehicles were not yet a thing“back then.”Consequently, we have updated data and examples to try to maintain the timeliness of the content.
