TESTING A BAYESIAN LEARNING THEORY OF DETERRENCE AMONG SERIOUS JUVENILE OFFENDERS*

The effect of criminal experience on risk perceptions is of central importance to deterrence theory but has been vastly understudied. This article develops a realistic Bayesian learning model of how individuals will update their risk perceptions over time in response to the signals they receive during their offending experiences. This model implies a simple function that we estimate to determine the deterrent effect of an arrest. We find that an individual who commits one crime and is arrested will increase his or her perceived probability of being caught by 6.3 percent compared with if he or she had not been arrested. We also find evidence that the more informative the signal received by an individual is, the more he or she will respond to it, which is consistent with more experienced offenders responding less to an arrest than less experienced offenders do. Parsing our results out by type of crime indicates that an individual who is arrested for an aggressive crime will increase both his or her aggressive crime risk perception as well as his or her income‐generating crime risk perception, although the magnitude of the former may be slightly larger. This implies that risk perception updating, and thus potentially deterrence, may be partially, although not completely, crime specific.     

The Conviction of Dr. Crippen: New Forensic Findings in a Century‐Old Murder

Abstract: Dr. Hawley Crippen was accused and convicted of murdering his wife in London in 1910. Key to the conviction was microscopic analysis of remains found in the Crippen’s coal cellar, which were identified as Cora Crippen based on a scar she was said to have. Dr. Crippen was hanged, always proclaiming his innocence. In this study, genealogical research was used to locate maternal relatives of Cora Crippen, and their mitochondrial haplotypes were determined. Next, one of the pathology slides of the scar was obtained, DNA was isolated, and the haplotype was determined. That process was then repeated. Finally, both DNA isolates were assayed for repetitive elements on autosomes and repetitive elements specific to the Y chromosome. Based on the genealogical and mitochondrial DNA research, the tissue on the pathology slide used to convict Dr. Crippen was not that of Cora Crippen. Moreover, that tissue was male in origin.     

我国大学生性价值观研究综述

大学生是备受关注的群体之一。通过对大学生性价值观的定义进行初步了解,纵观我国大学生性价值观的发展得出基本发展过是从保守到开放,现在还处在中间阶段并伴有多元化。最后就大学生性价值观存在的不足进行了阐述。     

对聋人大学生性教育的认识和思考

随着我国残疾人教育事业发展日益壮大,聋人高等教育已经取得了可喜的进步,但是性教育目前没有得到充分的关注。通过探讨聋人大学生性教育现状,并进一步分析其原因。希望引起学校重视,并为高校的教育教学提供了一种新型的理论和实践的依据。     

Child sex tourism: extending the borders of sexual offender legislation

Child sex tourism, the act of traveling to engage in sexual acts with minors, plagues developing nations worldwide. Several laws have been passed internationally in recent years designed to curtail this practice. Government entities and human rights organizations have driven these efforts. United States citizens represent a significant proportion of participants in child sex tourism. The PROTECT Act of 2003 prohibits United States citizens from participating in sexual acts with minors while traveling, and establishes extraterritorial jurisdiction. The case of Michael Lewis Clark, the first United States citizen convicted under this legislation, is highlighted. Child sex tourism poses unique issues to courts that will require ongoing clarification as challenges arise. This article discusses potential future challenges, describes strategies to address this problem, and relates this issue to psychiatry. Mental health providers may have the role of evaluating both the victims and perpetrators of child sex tourism. The authors propose a classification system for offenses and an initial list of topics to discuss with victims. The authors also describe the proper mechanism for reporting United States citizens suspected of participating in child sex tourism.