Understanding human aggression: New insights from neuroscience

The present paper reviews and summarizes the basic findings concerning the nature of the neurobiological and behavioral characteristics of aggression and rage. For heuristic purposes, the types of aggression will be reduced to two categories — defensive rage (affective defense) and predatory attack. This approach helps explain both the behavioral properties of aggression as well as the underlying neural substrates and mechanisms of aggression both in animals and humans. Defensive rage behavior is activated by a threatening stimulus that is real or perceived and is associated with marked sympathetic output. This yields impulsivity with minimal cortical involvement. Predatory attack behavior in both animals and humans is generally planned, taking minutes, hours, days, weeks, months, or even years (with respect to humans) for it to occur and is directed upon a specific individual target; it reflects few outward sympathetic signs and is believed to require cortical involvement for its expression. Predatory attack requires activation of the lateral hypothalamus, while defensive rage requires activation of the medial hypothalamus and midbrain periaqueductal gray (PAG). Both forms of aggressive behavior are controlled by components of the limbic system, a region of the forebrain that is influenced by sensory inputs from the cerebral cortex and monoaminergic inputs from the brainstem reticular formation. Control of aggressive tendencies is partly modifiable through conditioning and related learning principles generated through the cerebral cortex.     

The King County (Washington) Systems Integration Initiative: A First Look at the Kent District Dual System Youth Pilot Program

King County is one of five counties in Washington State participating in the John D. and Catherine T. MacArthur Foundation's Models for Change juvenile justice reform initiative. One key aspect of King County's Models for Change participation involves ongoing “systems integration” work intended to improve how youth who have cross‐over involvement in multiple systems—e.g., juvenile justice, child welfare, education, mental health, and/or others—are handled. These cross‐over cases often present a range of challenges to juvenile courts including substantial risk factors that increase their likelihood of continuing system involvement. This article provides a first look at an emerging pilot project in King County that is intended to improve how cross‐over cases are handled by child welfare and juvenile probation with the longer term goal of improving outcomes for these difficult cases.     

Forensic Discrimination of Dyed Hair Color: I. UV‐Visible Microspectrophotometry*†

Abstract: Current protocols for examining hair do not attempt to differentiate hair color using instrumental analysis. In this study, hair samples treated with 55 different red hair dyes were analyzed using UV‐visible microspectrophotometry between 200 and 700 nm. Using air as a background reference gave the best results, although mounting media such as glycerin could also be used. The contribution of the hair substrate is predominantly observed in the range of 300–400 nm while the dye peak is evident in the range of 425–550 nm. It was found that the presence of hair dye reduces the overall intrasample variability of the hair color. In addition, visual inspection and spectral interpretation showed that dyed hair exhibits distinct and discernable shades. The color of all samples was stable during storage and while all hair dyes fade with washing, significant fading of the color was only evident after daily washing for 3 weeks.     

Universities and the success of entrepreneurial ventures: evidence from the small business innovation research program

There has been little direct, systematic empirical analysis of the role that universities play in enhancing the success of entrepreneurial ventures. We attempt to fill this gap by analyzing data from the US SBIR program, a ??set-aside?? program that requires key federal agencies (e.g., Department of Defense) to allocate 2.5% of their research budget to small firms that attempt to commercialize new technologies. Based on estimation of Tobit and negative binomial regressions of the determinants of commercial success, we find that start-ups with closer ties to universities achieve higher levels of performance.     

The internationalization of science and its influence on academic entrepreneurship

We examine whether scientists employed in foreign countries and foreign-educated native researchers are more “entrepreneurial” than their “domestic” counterparts. We conjecture that foreign-born and foreign-educated scientists possess broader scientific skills and social capital, which increases their likelihood that they will start their own companies. To test this hypothesis we analyze comprehensive data from researchers at the Max Planck Society in Germany. Our findings provide strong support for the conjecture that academic entrepreneurship can be stimulated by facilitating the mobility of scientists across countries.     

Non-Contingent Success Reduces People’s Desire for Processes that Adhere to Principles of Fairness

A central tenet of justice theory and research is that people prefer decisions to be made with processes that adhere to principles of fairness. The present research identified a boundary condition for this general tendency. Across three studies, we found that people who experienced non-contingent success had less of a desire for fair processes relative to their counterparts who experienced contingent success. Furthermore, results attributable to other independent variables, namely regulatory focus in Study 2 and self-affirmation in Study 3, shed light on the underlying mechanism: people experience non-contingent success as self-threatening and lower their desire for processes that adhere to fairness in the service of protecting themselves against the threat. Theoretical implications are discussed as are limitations of the studies and suggestions for future research.     

The Economics of Science and Technology

This paper provides a non-technical, accessible introduction to various topics in the burgeoning literature on the economics of science and technology. This is an interdisciplinary literature, drawing on the work of scholars in the fields of economics, public policy, sociology and management. The aim of this paper is to foster a deeper appreciation of the economic importance of science and technology issues. We also hope to stimulate additional research on these topics.