The primary assumption within the recent personality and political orientations literature is that personality traits cause people to develop political attitudes. In contrast, research relying on traditional psychological and developmental theories suggests the relationship between most personality dimensions and political orientations are either not significant or weak. Research from behavioral genetics suggests the covariance between personality and political preferences is not causal, but due to a common, latent genetic factor that mutually influences both. The contradictory assumptions and findings from these research streams have yet to be resolved. This is in part due to the reliance on cross-sectional data and the lack of longitudinal genetically informative data. Here, using two independent longitudinal genetically informative samples, we examine the joint development of personality traits and attitude dimensions to explore the underlying causal mechanisms that drive the relationship between these features and provide a first step in resolving the causal question. We find change in personality over a ten-year period does not predict change in political attitudes, which does not support a causal relationship between personality traits and political attitudes as is frequently assumed. Rather, political attitudes are often more stable than the key personality traits assumed to be predicting them. Finally, the results from our genetic models find that no additional variance is accounted for by the causal pathway from personality traits to political attitudes. Our findings remain consistent with the original construction of the five-factor model of personality and developmental theories on attitude formation, but challenge recent work in this area.
Estimating the cost to society of individual crimes is essential to the economic evaluation of many social programs, such as substance abuse treatment and community policing. A review of the crime-costing literature reveals multiple sources, including published articles and government reports, which collectively represent the alternative approaches for estimating the economic losses associated with criminal activity. Many of these sources are based upon data that are more than 10 years old, indicating a need for updated figures. This study presents a comprehensive methodology for calculating the cost to society of various criminal acts. Tangible and intangible losses are estimated using the most current data available. The selected approach, which incorporates both the cost-of-illness and the jury compensation methods, yields cost estimates for more than a dozen major crime categories, including several categories not found in previous studies. Updated crime cost estimates can help government agencies and other organizations execute more prudent policy evaluations, particularly benefit-cost analyses of substance abuse treatment or other interventions that reduce crime.
Comparative studies of the brain in mammals suggest that there are general architectural principles governing its growth and evolutionary development. We are beginning to understand the geometric, biophysical and energy constraints that have governed the evolution and functional organization of the brain and its underlying neuronal network. The object of this review is to present current perspectives on primate brain evolution, especially in humans, and to examine some hypothetical organizing principles that underlie the brain’s complex organization. Some of the design principles and operational modes that underlie the information processing capacity of the cerebral cortex in primates will be explored. It is shown that the development of the cortex coordinates folding with connectivity in a way that produces smaller and faster brains, then otherwise would have been possible. In view of the central importance placed on brain evolution in explaining the success of our own species, one may wonder whether there are physical limits that constrain its processing power and evolutionary potential. It will be argued that at a brain size of about 3500 cm(3), corresponding to a brain volume two to three times that of modern man, the brain seems to reach its maximum processing capacity. The larger the brain grows beyond this critical size, the less efficient it will become, thus limiting any improvement in cognitive power.
2006-lurz-thedubiousquickkill.html: “The Dubious Quick Kill, part 1⁄2: Sword wounds and the circulatory system”, (2006; ):
In conclusion, fencing tempo is a vital element of swordsmanship, but clearly for the duelist hitting before being hit is not at all the same thing as hitting without being hit. Exsanguination is the principal mechanism of death caused by stabbing and incising wounds and death by this means is seldom instantaneous. Although stab wounds to the heart are generally imagined to be instantly incapacitating, numerous modern medical case histories indicate that while victims of such wounds may immediately collapse upon being wounded, rapid disability from this type of wound is by no means certain. Many present-day victims of penetrating wounds involving the lungs and the great vessels of the thorax have also demonstrated a remarkable ability to remain physically active minutes to hours after their wounds were inflicted. These cases are consistent with reports of duelists who, subsequent to having been grievously or even mortally wounded through the chest, neck, or abdomen, nevertheless remained actively engaged upon the terrain and fully able to continue long enough to dispatch those who had wounded them.
…Early American motion pictures have frequently misrepresented virtually every aspect of authentic swordplay. This seems to have been especially true of the industry’s depiction of the manner in which swordsmen fell before the blades of their opponents. While anecdotes of duels may have been biased by politics or personal vanity, modern forensic medicine provides ample evidence to support historical accounts of gravely wounded duelists continuing in combats for surprising lengths of time, sometimes killing those who had killed them.
In the first installment of this essay modern forensic evidence indicated that exsanguination is the principal mechanism of death caused by stabbing and incising wounds, but that death by this means is seldom instantaneous; victims frequently capable of continued physical activity, even after being stabbed in the heart. Similarly, victims of sharp force injuries to the lungs are not infrequently able to carry on for protracted periods of time. Wounds which result in the introduction of blood into the upper airway, on the other hand, are likely to incapacitate and kill an adversary quite rapidly.
Duels featuring penetrating wounds to the muscles of the sword arm appear in some cases to have left duelists fully capable of manipulating their weapons. Thrusts to the thigh and leg may have been even less efficacious. Strokes with the cutting edges of swords to the limbs may result in more serious wounds to the musculature than the penetrating variety, but historical accounts of duels demonstrate that immediate incapacitation of an adversary stricken with such wounds was by no means guaranteed. Incising wounds which sever tendons, however, can be expected to immediately incapacitate the muscles from which they arise. Recent medical reports of sharp force injuries to the brain suggest that even a sword-thrust penetrating the skull ought not to have been expected always to disable an opponent instantaneously. While severe pain is usually incapacitating, the stress of combat may mask the pain of gravely serious wounds, enabling the determined duelist to remain on the ground for a considerable length of time.
The immediate consequences to a duelist of wounds inflicted by thrusts or cuts from the rapier, dueling sabre or smallsword were unpredictable. While historical anecdotes of affairs of honor and twentieth century medical reports show that many stabbing victims collapsed immediately upon being wounded, others did not. While a swordsman certainly gained no advantage for having been wounded, it cannot be said that an unscathed adversary, after having delivered a fatal thrust or cut, had no further concern for his safety. Duelists receiving serious and even mortal wounds were sometimes able to continue effectively in the combat long enough to take the lives of those who had taken theirs…For the duelist, however, another form of tempo had to be considered. In the early history of affairs of honor, this “dueling tempo” spanned the period extending from the moment that a wound was inflicted until the instant that the adversary was no longer able to continue effectively. This span of time was unpredictable in length and could be expressed in terms ranging from a fraction of a second to minutes. Considering the number and severity of wounds that were sustained by combatants in the early days of the duel, it would not be surprising to find that many duelists of latter days secretly breathed a sigh of relief when interrupted by seconds rushing in to terminate affairs of honor immediately upon the delivery of a well placed cut or thrust.
2016-mclean.pdf: “Does Academic Research Destroy Stock Return Predictability?”, (2016-02-01; ):
We study the out-of-sample and post-publication return predictability of 97 variables shown to predict cross-sectional stock returns. Portfolio returns are 26% lower out-of-sample and 58% lower post-publication. The out-of-sample decline is an upper bound estimate of data mining effects. We estimate a 32% (58%–26%) lower return from publication-informed trading. Post-publication declines are greater for predictors with higher in-sample returns, and returns are higher for portfolios concentrated in stocks with high idiosyncratic risk and low liquidity. Predictor portfolios exhibit post-publication increases in correlations with other published-predictor portfolios. Our findings suggest that investors learn about mispricing from academic publications.