This book is an attempt to bring closer the greater vision of the
development of Social Informatics. Social Informatics can be de?ned as a
discipline of informatics that studies how information systems can
realize social goals, use social concepts, or become sources of
information about social phenomena. All of these research directions are
present in this book: fairness is a social goal; trust is a social
concept; and much of this book bases on the study of traces of Internet
auctions (used also to drive social simulations) that are a rich source
of information about social phenomena. The book has been written for an
audience of graduate students working in the area of informatics and the
social sciences, in an attempt to bridge the gap between the two
disciplines. Because of this, the book avoids the use of excessive
mathematical formalism, especially in Chapter 2 that attempts to
summarize the theoretical basis of the two disciplines of trust and fa-
ness management. Readers are usually directed to quoted literature for
the purpose of studying mathematical proofs of the cited theorems.