Toni’s numerous contributions to the understanding of social networks and peer effects in economics had quickly made it clear that he was one of the leading economic theorists of his generation. His research was inspired by important instances of social interactions, such as understanding the incentives for individuals to engage in criminal behavior, or how the transmission of information about...

On-line social networking sites often involve multiple relations simultaneously. While people can build an explicit social network by adding each other as friends, they can also form several implicit social networks through their daily interactions like commenting on people’s posts, or tagging people’s photos. So given a real social networking system which changes over time, what can we say abo...

This paper studies the formation of networks among individuals. The focus is on the compatibility of overall societal welfare with individual incentives to form and sever links. The paper reviews and synthesizes some previous results on the subject, and also provides new results on the existence of pairwise-stable networks and the relationship between pairwise stable and efficient networks in a...

in value creation process via finding and exploiting opportunities, entrepreneurs have to create and use social networks to gain access to resources and information and benefit from their social capital. the entrepreneurs’ activities, contacts and performance can influence the social capital of a society. this research reviews the previous research regarding the effect of sex segregation on soc...

In much of economic theory it is assumed that economic agents interact, directly or indirectly, with all others, or at least that they have the opportunity to do so in order to achieve a desired outcome for themselves. In reality, as common sense tells us, things are quite different. Traders in a market have preferred trading partners, perhaps because of an established history of trust, or simp...

a vast number of organizational projects as well as complexity of decision making process can cause particular challenges for project management and its leadership. in order to use organization assets and opportunities efficiently, it is necessary that manager implement a comprehensive multidimensional project portfolio management system that considers economic, social and technical details of ...