Excretion of Delta9-tetrahydrocannabinol in sweat

The aims of this study were: first, to determine the accuracy of the Cameriere method for assessing chronological age in children based on the relationship between age and measurement of open apices in teeth and, second, to compare the accuracy of this method with the widely used Demirjian et al. method and with the method proposed by Willems et al. Orthopantomographs taken from white Italian, Spain and Croatian children (401 girls, 355 boys) aged between 5 and 15 years were analysed following the Cameriere, Demirjian and Willems methods. The difference between chronological and dental age was calculated for each individual and each method (residual). The accuracy of each method was assessed using the mean of the absolute values of the residuals (mean prediction error). Results showed that the Cameriere method slightly underestimated the real age of children. The median of the residuals was 0.081 years (interquartile range, IQR=0.668 years) for girls and 0.036 years for boys (interquartile range, IQR=0.732 years). The Willems method showed an overestimation of the real age of boys, with a median residual error of -0.247 years and an underestimation of the real age of girls (median residual error=0.073 years). Lastly, the Demirjian method overestimated the real age of both boys and girls, with a median residual error of -0.750 years for girls and -0.611 years for boys. The Cameriere method yielded a mean prediction error of 0.407 years for girls and 0.380 years for boys. Although the accuracy of this method was better for boys than for girls, the difference between the two mean prediction errors was not statistically significant (p=0.19). The Demirjian method was found to overestimate age for both boys and girls but the mean prediction error for girls was significantly greater than that for boys (p=0.024), and was significantly less accurate than the Cameriere method (p<0.001). The Willems method was better than that of Demirjian (p=0.0032), but was significantly less accurate than that of Cameriere (p<0.001).     

A Behavioral Theory of Electoral Structure

Why are party systems in modern democracies so essentially robust? We theorize patterns of electoral competition as the outcome of a struggle between entropy and structure. Forces of entropy entail idiosyncratic voting behavior guided by subjective evaluations, while forces of structure entail coordinated behavior emerging from objective aspects of party preference. Our model locates determinants of party preference on a continuum spanning subjective and objective concerns. Entropy is endemic but elections for nationwide executive office periodically prime objective concerns, reinstating structure in party systems. We demonstrate the cyclical pulse of national elections in a comparative analysis of pseudo-randomized survey data from the European Election Studies since 1989. We also show how feedback from differently-sized party systems consolidates different working equilibria.     

Hierarchy Amidst Anarchy: A Transaction Costs Approach to International Security Cooperation

This article provides an interest-based explanation for hierarchy in international politics. The study suggests that—even in a self-help system—self–interested actors voluntarily curtail their sovereignty to obtain needed assurances, yet that these actors have a choice among cooperative security arrangements with different degrees of "bindingness." The key to understanding countries' international institutional choices is in focusing on economic theories of organization and, more specifically, transaction costs. The study begins with the conceptualization of a continuum of cooperative security arrangements with different degrees of bindingness. It then examines different bodies of literature—the traditional realist model and economies–of–scale arguments—and claims that both fail to account for hierarchical security structures in the international system. Recognizing that economists explain hierarchy amidst market anarchy by examining transaction costs, the study makes use of this insight by developing an analogous argument for hierarchy in international politics. Finally, to test the propositions advanced in this article, a brief case study examines plans for the creation of a European Defense Community.     

The Domestic Determinants of Foreign Policy Behavior in Middle Eastern Enduring Rivals, 1948–1998

Rivalry-related issues tend to dominate the foreign policy agenda of states in enduring rivalries. Thus, the enduring rivalry research program provides an important framework for foreign policy analysis. This paper probes the domestic elements of strategic interaction in the three main Middle Eastern rivalries: Israel–Egypt, Israel–Jordan, and Israel–Syria. The empirical tests probe whether the number of parties represented in Israel's cabinet and Arab and Israeli domestic unrest impact the propensity for these rivals to employ hostility against each other. We specify vector autoregression (VAR) models and negative binomial event count models with monthly levels of hostility as the dependent variables for the period 1948–1998. The results provide interesting foreign policy implications regarding the impact of Israeli domestic political structures on conflict dynamics in the Middle East. There is no evidence that the foreign policy behavior of Arab states becomes risk averse when Israeli leaders might need an external scapegoat. These findings are discussed in the context of other research on enduring rivalries and strategic interaction.     

A Vigilante Model of Justice: Revenge,Reconciliation, Forgiveness,and Avoidance

Once a working relationship is damaged through an act of injustice, how do the victim and offender repair their relationship? What causes the victim to let go of the anger and resentment and then reconcile with the offender? We propose a theory that the likelihood of forgiveness and reconciliation is greatly enhanced, and revenge and avoidance greatly decreased, if justice is first served. That is, forgiveness follows justice; without justice, forgiveness is much less likely. Justice may be served one of three ways: (1) by the victim evening the score; (2) by the organization punishing the offender; or (3) by the offender repenting. We recommend that managers establish a procedurally just climate so that victims of offense seek distributive justice through formal channels rather than seeking it themselves through revenge.     

The Limits of Peace: Third Parties in Civil Wars in Southeast Asia, 1993–2004

At of the end of 2005, Asia had the highest number of active civil war dyads. The number of active dyads in other regions was either low or declining. Africa, in particular, experienced a sharp drop in the number of active dyads from 2001 to 2005. Civil wars in Asia also last longer than wars in other regions. With a high number of warring dyads fighting in long wars, the expectation would be that the region would be the focus of third-party conflict management, but this is not the case. In this article, we use an original data set to take a closer look at this gap in expectations by focusing on third-party efforts in Southeast Asia between 1993 and 2004. Bilateral talks were the most common form of third-party engagement, but mediation has been the most likely form to lead to agreements between warring parties. We conclude the article with a discussion of the policy implications of this research.     

The politics and economics of auction design in the market for sulfur dioxide pollution

The Clean Air Act Amendments of 1990 aim to create a market in emissions of sulfur dioxide from power plants by distributing a fixed number of tradable pollution permits called “allowances,” and by providing for the auction of a small fraction of the total number of allowances. This article describes potential inefficiencies in this market and how an auction could enhance the market. It shows that the method by which allowances are “bundled together” for auction is an important efficiency-related element of auction design. The article also examines the politics of auction design and how equity goals strongly shaped the design ultimately adopted by Congress. Finally, some implications are suggested for the role of policy analysis in the legislative process.