Do too many cooks always spoil the stew? An experimental analysis of rent-seeking and the role of a strategic buyer

Laboratory methods are used to evaluate the effects of institutional arrangements and rent-defending activity on rent-seeking auction outcomes. In part, Nash equilibrium predictions are a useful behavioral guide: As predicted, more rents are dissipated in perfectly-discriminating auctions, where the high-bidder wins, than in lotteries, where relative bids determine the chance of winning. Also as predicted, the introduction of a rent-defending buyer reduces social costs. Nevertheless, the social costs of rent-seeking consistently exceed predicted levels. Moreover, individual bidding, especially by buyers, deviates markedly from Nash predictions.     

Inhibition of bleach-induced luminol chemiluminescence

The luminol chemiluminescence presumptive test for blood is based on the mild peroxidase activity of hemoglobin in basic peroxide solution. However, this test is subject to interference by strong oxidants, certain transition metal ions, and true peroxidases. This paper reports methods for reducing the interference caused by hypochlorite-containing bleaches. Amines such as 1,2-diaminoethane react rapidly with hypochlorite without interfering significantly with the hemoglobin-catalyzed oxidation. Thus, addition of 0.1 mol/L 1,2-diaminoethane to a standard luminol-peroxide spray lead to almost complete inhibition of hypochlorite-induced chemiluminescence while satisfactory chemiluminescence was still observed from bloodstains. If time allows, an alternative method for reducing interference from hypochlorite bleach is to wait several days until the bloodstains have dried thoroughly, by which time the hypochlorite will have decomposed.     

Daubert,Cognitive Malingering,and Test Accuracy

Daubert v. Merrell Dow Pharmaceuticals (1993) held that trial judges should permit expert scientific testimony only when the reasoning or methodology underlying the testimony is scientifically valid, and ... properly can be applied to the facts in issue. Vallabhajosula and van Gorp (V&vG, 2001) have suggested that when the Daubert standard is applied to tests for malingered cognitive deficits, courts should deem admissible only results that meet this mathematical standard: assuming a pretest probability of .3, a positive score on the malingering test should yield a posttest probability of at least .8. This paper shows that V&vG's criterion may lead to misunderstandings about the kind of information malingering measures provide. After reviewing cases that have discussed both the Daubert decision and malingered cognitive deficits, this paper uses data from the Test of Memory Malingering (T. N. Tombaugh, 1996) to provide a general characterization of the mathematical properties of malingering measures. The paper then describes how pretest knowledge about malingering is combined with knowledge about a test's performance to generate a posttest probability of malingering. The results can help mental health experts respond to Daubert-inspired challenges to conclusions based on malingering measures.     

Russian Authoritarian Pluralism: a Local and Global Trend?

Russia is a country that has witnessed increasingly authoritarian governance over the last decade. Civil liberties have been curtailed; local and regional political power has been usurped by the Kremlin. Russia remains a democracy insomuch as elections are conducted, but increasingly those elections are so heavily influenced by state control over the media and fiscal elements of social power that substantive Western notions of democracy have greatly atrophied. However, the decline in substantive democracy has received solid support from the Russian electorate. As such, under the leadership of Boris Yeltsin and Vladimir Putin, Russia has become an ‘authoritarian pluralist’ state that now expresses long-standing cultural affinity for a strong authoritarian rule under an increasingly thin veneer of democratic principles. Furthermore, variations of this new Russian model seem to be spreading globally.

Democracy is the dictatorship of the law. The stronger the state is, the freer the individual.

Vladimir Putin     

Analysis of artificial radiocarbon in different skeletal and dental tissue types to evaluate date of death

Radiocarbon dating, with special reference to the modern bomb-curve, can provide useful information to elucidate the date of death of skeletonized human remains. Interpretation can be enhanced with analysis of different types of tissues within a single skeleton because of the known variability of formation times and remodeling rates. Analysis of radiocarbon content of teeth, especially the enamel in tooth crowns, provides information about the date of formation in the childhood years and in consideration of the known timing of tooth formation can be used to estimate the birth date after 1950 ad. Radiocarbon analysis of modern cortical and trabecular bone samples from the same skeleton may allow proper placement on the pre-1963 or post-1963 sides of the bomb-curve as most trabecular bone generally undergoes more rapid remodeling than does most cortical bone. Pre-1963 bone formation would produce higher radiocarbon values for most trabecular bone than for most cortical bone. This relationship is reversed for formation after 1963. Radiocarbon analysis was conducted in this study on dental, cortical, and trabecular bone samples from two adult individuals of known birth (1925 and 1926) and death dates (1995 and 1959). As expected, the dental results correspond to prebomb-curve values reflecting conditions during the childhoods of the individuals. The radiocarbon content of most bone samples reflected the higher modern bomb-curve values. Within the bone sample analyses, the values of the trabecular bone were higher than those of cortical bone and supported the known placement on the pre-1963 side of the bomb-curve.