Are US Crime Rates Really Unit Root Processes?

Existing research has uncovered little evidence against the hypothesis of US crime rates being unit root processes, despite the uncomfortable implications of this assumption. In light of this, the present paper draws upon noted changes in the temporal patterns of US crime rates since 1960 to undertake an informed approach to testing of the unit root hypothesis which incorporates two potential points of structural change. The results obtained show the unit root hypothesis to be rejected for all classifications of criminal activity examined over the period 1960 to 2007. In addition, the dates of the detected breakpoints are supported by a variety of arguments available in the existing criminology literature concerning alternative determinants of crime and their movements. Interestingly, a difference is observed in the nature of the breaks detected for violent and property crimes. However, potential explanations for this are again found in theoretical arguments available in the criminology literature. Finally, the implications of the current findings for the properties of crime, its subsequent statistical analysis and past and future research are discussed.     

Forensic entomology: application, education and research in Western Australia.

Forensic entomology as a science and a tool for investigation has had slow beginnings in Australia. A number of small animal decomposition trials have been recorded in the literature but mostly from an ecological rather than a forensic entomology perspective. In the last 20 years, a number of more forensically orientated field trials on small pigs and some fly developmental trials in the laboratory have been conducted but lack any replication. The following article was presented at an international seminar to detail the current research in forensic entomology, the applications of forensic entomology in scene of crime (SOC) and homicide investigations and the education of police and judiciary in the discipline of forensic entomology in Western Australia over the last 10 years.     

School Smoking Policy Characteristics and Individual Perceptions of the School Tobacco Context: Are They Linked to Students’ Smoking Status?

The purpose of this study was to explore individual- and school-level policy characteristics on student smoking behavior using an ecological perspective. Participants were 24,213 (51% female) Grade 10–11 students from 81 schools in five Canadian provinces. Data were collected using student self-report surveys, written policies collected from schools, interviews with school administrators, and school property observations to assess multiple dimensions of the school tobacco policy. The multi-level modeling results revealed that the school a student attended was associated with his/her smoking behavior. Individual-level variables that were associated with student smoking included lower school connectedness, a greater number of family and friends who smoked, higher perceptions of student smoking prevalence, lower perceptions of student smoking frequency, and stronger perceptions of the school tobacco context. School-level variables associated with student smoking included weaker policy intention indicating prohibition and assistance to overcome tobacco addiction, weaker policy implementation involving strategies for enforcement, and a higher number of students smoking on school property. These findings suggest that the school environment is important to tobacco control strategies, and that various policy dimensions have unique relationships to student smoking. School tobacco policies should be part of a comprehensive approach to adolescent tobacco use.     

Detection of Acetone Processing of Castor Bean Mash for Forensic Investigation of Ricin Preparation Methods*

Abstract: Samples containing the toxic castor bean protein ricin have been recently seized in connection with biocriminal activity. Analytical methods that enable investigators to determine how the samples were prepared and to match seized samples to potential source materials are needed. One commonly described crude ricin preparation method is acetone extraction of crushed castor beans. Here, we describe the use of solid‐phase microextraction and headspace analysis to determine whether castor beans were processed by acetone extraction. We prepared acetone‐extracted castor bean mash, along with controls of unextracted mash and mash extracted with nonacetone organic solvents. Samples of acetone‐extracted mash and unextracted mash were stored in closed containers for up to 109 days at both room temperature and ?20°C, and in open containers at room temperature for up to 94 days. Acetone‐extracted bean mash could consistently be statistically distinguished from controls, even after storage in open containers for 94 days.     

Investigating Differences in Truthful and Fabricated Symptoms of Traumatic Stress over Time

False allegations of victimization typically are accompanied by malingered emotional symptomology to corroborate claims. This analog study was designed to compare truthful and fabricated symptom profiles on measures of post-traumatic stress (i.e., Revised Impact of Event Scale, Post-Traumatic Stress Disorder (PTSD) Checklist, Trauma Symptom Inventory) and levels of symptom consistency over time. Participants (undergraduate students) described their mental health symptoms for both traumas at time 1 (N?=?291), time 2 (N?=?252, 3 month), and time 3 (N?=?181, 6 months). Results indicated that fabricated traumas were associated with inflated symptom profiles. Validity scales were not effective at discerning symptom veracity, although reports could be discriminated somewhat by atypical responding and clinical scales. PTSD symptoms in malingerers also were reported more consistently over time. This research offers applicable information for identifying feigned traumatic stress.     

Relative importance of external R&D: Trends and motivations

This paper reports the findings of our survey study of the methods firms use to generate new basic and applied research and development (R&D). By far, the most important source of new R&D are the firms' in-house programs. This finding holds for firms of all sizes. External R&D arrangements are most common for basic research, although most firms indicated that in the future they expect to increase their reliance on external sources for applied R&D. Small firms tend to acquire technology from the provider, whereas larger firms seem to utilize licensing agreements for gaining access to the results of R&D. Large firms may also be using more of a portfolio approach to external R&D in that they often use several different sources. They also appear to form their outside R&D ventures not only for traditional cost/risk-sharing reasons but also for strategic and competitive reasons. Their attempts to diversify their sources of technology are just as important as the traditional cost- and risk-sharing motivation. Finally, although some collaborative R&D ventures are in response to foreign competition, this appears to be of more concern to mid-sized firms than small or large ones.     

Defensive Gun Uses: New Evidence from a National Survey

The number of civilian defensive gun uses (DGUs) against criminal attackers is regularly invoked in public policy debates as a benefit of widespread private ownership of firearms. Yet there is considerable uncertainty for the prevalence of civilian DGUs, with estimates ranging from 108,000 (using the National Crime Victimization Survey) to 2.5 million (using smaller telephone surveys) per year. In this paper we analyze the results of a new national random-digit-dial telephone survey to estimate the prevalence of DGU and then discuss the plausibility of the results in light of other well-known facts and possible sources of bias in survey data for sensitive behaviors. Because DGU is a relatively rare event by any measure, a small proportion of respondents who falsely report a gun use can produce substantial overestimates of the prevalence of DGU, even if every true defensive gun user conceals his or her use. We find that estimates from this new survey are apparently subject to a large positive bias, which calls into question the accuracy of DGU estimates based on data from general-population surveys. Our analysis also suggests that available survey data are not able to determine whether reported DGU incidents, even if true, add to or detract from public health and safety.     

Treating impulsivity, irritability, and aggression of antisocial personality disorder with quetiapine

There are few effective treatments of antisocial personality disorder (APD). Preliminary work suggests that the atypical antipsychotic quetiapine can decrease irritability, impulsivity, and aggressiveness. Data were collected from 4 patients with APD who were referred to a maximum-security inpatient psychiatric facility for pretrial evaluation and were treated with quetiapine. Quetiapine was effective in these patients as was indicated by a decrease in symptoms such as impulsivity, hostility, aggressiveness, irritability, and rage reactions. Typical dosage was 600 to 800 mg per day. Patients attributed their willingness to comply with quetiapine treatment to both the effectiveness of the drug and its favorable adverse-event profile. Quetiapine was successfully combined with mood stabilizers, particularly gabapentin, in patients with prominent affective instability. Quetiapine has demonstrated efficacy in aggression, impulsivity, and irritability and has proved to be an effective medication in these patients with APD. In addition, its favorable adverse-event profile makes patients willing to comply.     

The Gender Gap among Teen Survey Respondents: Why are Boys more Likely to Report a Gun in the Home than Girls?

It is a reliable though unexplained feature of national surveys that include items on gun ownership that wives are less likely to report a gun in the home than husbands. In this article we extend the inquiry regarding this gender gap in reporting of household guns to include adolescent children (age 12–17 years). The California Health Interview Survey of 2001, the largest-ever state survey of its kind, includes over 4000 marital households in which both a parent and adolescent child were interviewed and asked whether there was a gun in the home. There is little “age gap” in reporting—California teens are almost as likely to say that there is a gun as are their parents—but there is a gender gap among both the teens and their parents. We also find a large gap in personal experience with guns—boys are three times as likely to report hunting or shooting with a family member than girls. This difference in experience fully accounts for the gender gap in reporting. The relevance of these findings for the interpretation of survey data is clear. Whether there is a gun reported in a home depends to a remarkable extent on which member of the household is asked the question. Hence, the method of selection of respondent(s) from within a household will affect estimates of the patterns and prevalence of gun ownership, and, potentially, the accuracy of case–control studies that use self-report information about guns in the home.