Friends don’t let friends eat cookies: Effects of restrictive eating norms on consumption among friends

Bidding among friends and enemies∗

We consider an auction setting in which bidders, even if they fail to obtain the good, care about the price paid by the winner. We study the impact of these price externalities on the first-price auction and the second-price auction in a symmetric information framework. We establish a distinction between price externalities that do not depend on the identity of the winner and price externalitie...

Irony in Talk Among Friends

Ranking Friends ∗

We investigate the scope for cooperation within a community engaged in repeated reciprocal interactions. Players seek the help of others and approach them sequentially according to some fixed order, that is, a ranking profile. We study the ranking profiles that correspond to the social structures that are most effective in sustaining cooperation in equilibrium, that is, social structures that s...

A fast algorithm for identifying Friends-of-Friends halos

We describe a simple and fast algorithm for identifying friends-of-friends clusters and prove its correctness. The algorithm avoids unnecessary expensive neighbor queries, uses minimal memory overhead, and rejects slowdown in high over-density regions. We define our algorithm formally based on pair enumeration, a problem that has been heavily studied in fast 2-point correlation codes and our re...

BlockParty: Cooperative offsite backup among friends

We are keeping an increasing amount of valuable data in digital format only. Offsite backup systems are ideal for ensuring that such irreplaceable personal information will be preserved in the face of disk failures, unexpected disastrous events and operator mistakes. It is time to bring offsite backup solutions, traditionally a luxury to only deep pocketed enterprises, to the masses of home use...