Abstract Do negative economic shocks heighten public opposition to immigration, and through what mechanisms? Extant research suggests that circumstances levels of labour market competition have little bearing on citizens' immigration attitudes. Yet personal the potential trigger threatened, anti-immigration responses – possibly channels other than prior cross-sectional has been unable detect. T...

Drawing on recent results in the industrial organization literature (Carvajal et al. 2013), we derive non-parametric tests of the tragedy of the commons. Our approach allows group output to be any arbitrarily concave, differentiable function of total inputs and for individual exploiters of the resource to have any arbitrary convex, differentiable cost of supplying inputs. We show that observed ...

The proliferation of smartphones has changed our life due to the enhanced connectivity, increased storage capacity and innovative functionality they offer. Their increased popularity has drawn the attention of attackers, thus, nowadays their users are exposed to many security and privacy threats. The fact that smartphones store significant data (e.g. personal, business, government, etc.) in com...

Many different monitoring systems have been created to identify system state conditions to detect or prevent a myriad of deliberate attacks, or arbitrary faults inherent in any complex system. Monitoring systems are also vulnerable to attack. A stealthy attacker can simply turn off or disable these monitoring systems without being detected; he would thus be able to perpetrate the very attacks t...

Approximately 4.5 million U.S. citizen children live in mixed-status families, in which at least 1 family member is an unauthorized migrant and therefore vulnerable to detention and deportation from the United States (Passel & Cohn, 2011). This article critically examines the current state of the literature on the psychosocial consequences of detention and deportation for unauthorized migrants,...

This paper documents changes in the rates and characteristics of undercover police investigations against child sexual exploiters on the Internet. Telephone interviews were conducted with law enforcement officials about a nationally representative sample of cases ending in arrest for an Internet-related sex crime against a minor in 2000 and 2006. The survey found a 280% increase in arrests of o...

A study was performed to investigate a domain for a mobile and social service, where a web of social trails is overlaid over a physical space. Using a method inspired by work of the city planner Kevin Lynch, 20 subjects were interviewed about their experiences, activities, movements and habits related to a specific shopping mall. Design implications for the service were drawn from subjects’ ske...