Title of Document: RECIPROCITY IN ONLINE MARKETS: EMPIRICAL STUDIES OF AUCTION AND BARTER MARKETS Shun Ye, Doctor of Philosophy, 2013 Directed By: Professor Siva Viswanathan, Department of Decision, Operations and Information Technologies Professor Il-Horn Hann, Department of Decision, Operations and Information Technologies My dissertation seeks to understand how reciprocity affects transactio...

This position paper explores the dual nature of friendship relations as an enabler but also as a pitfall for privacy in social networks. The privacy-deteriorating consequences of unilateral friendship disclosure are quantified for an existing medium-sized social network site. A lightweight implementation of hidden friendship using existing standards is proposed and assessed for practicable and ...

Humans are capable of remarkable feats of cooperation. Warfare is an extreme example: when under attack, hundreds or even millions of people might join forces to provide a mutual defence. In A Cooperative Species, economists Samuel Bowles and Herbert Gintis update their ideas on the evolutionary origins of altruism. Containing new data and analysis, their book is a sustained and detailed argume...

Reciprocity principles, which entail equivalent outcome on exchange of cause and effect, are widely used and accepted. We present a piezoelectric composite system designed so that reciprocity does not hold; sensitivity is substantially enhanced. Reciprocity failure is observed in which the piezoelectric direct effect (stress causes polarization) sensitivity dkij is unequal to the converse effec...