The Socio-Economic Background of the Gwangju Uprising

The Gwangju Uprising is fully explained when it is viewed not as a single event for 10 days but as the eruption of socio-economic contradictions of South Korean society in the late 1970s. Located between the Bak Jeong-hee dictatorship and the June Breakthrough of the working class in 1987, it was an explosion of the confrontation between monopoly capitalists and the unruling classes that had been alienated in the process of industrialization in the 1960s to 1970s. This contradiction appeared as the confrontation of troops commanded by the new military coup leaders versus Gwangju citizens demanding democratization.     

Validity of Demirjian's and modified Demirjian's methods in age estimation for Korean juveniles and adolescents

In estimating age of juveniles and adolescents, the teeth are employed primarily because of its low variability and less affection by endocrine and nutritional status in development. Demirjian established criteria for evaluating maturity of teeth and his method has been used throughout the world. However, several studies showed the inappropriateness of Demirjian's method on populations other than the one it is based on. Consequently some researchers modified Demirjian's method using data of several different populations. Demirjian himself also published a revised method to overcome other shortcomings of his original method. The aim of this study was to test the validity of Demirjian's and the modified methods (Demirjian's revised, Willems', Chaillet's and new Korean methods) for Korean juveniles and adolescents. 1483 digital orthopantomograms which consist of 754 males and 729 females in the age range of 3-16 years were collected. New age estimation method based on Korean population data was calculated. Dental age was estimated according to each method and the validity was evaluated using the differences between chronological and dental age. The inter- and intra-observer reliability was evaluated to be excellent. Statistically significant difference was observed between chronological and dental age in all the methods for both sexes except new Korean method for both sexes and Demirjian's revised method for males. However, when analyzing absolute and squared value of difference, Willems' method was found to be most accurate followed by new Korean method with slight difference for Korean population for both sexes. In conclusion, both Willems' method and new Korean method conducted by present study were proven to be suitable for Korean population.     

Determination of sex for the 12th thoracic vertebra by morphometry of three-dimensional reconstructed vertebral models

Thirty-three linear measurements and two ratios were derived from 102 12th thoracic vertebrae of the Digital Korean database at the Catholic Institute for Applied Anatomy. Of 35 linear traits, 23 were sexually dimorphic. We created 23 discriminant function equations that predicted sex with 62.7-85.3% accuracy. The analysis using combinations of two factors gave higher accuracies: most equations with accuracies over 80% included at least one measurement involving the coronal diameter of the vertebral endplate. Using stepwise method of discriminant function analysis, three variables predicted sex with 90.0% accuracy: the coronal diameter of the superior endplate of the vertebral body, the ratio of anterior to middle height of the body, and the length of the left mammillary process and pedicle. Coronal dimensions of the vertebral body represented the major sex difference. These equations will help forensic discrimination of the sex of this vertebra among Koreans.     

The Effect of Information Asymmetry and Participative Target Setting on Target Ratcheting and Incentives

ABSTRACT

Using the performance evaluation data of Korean SOEs, the impact of information asymmetry within target setting on ratcheting intensity and the ratchet effect is investigated. It was found that ratcheting intensity is substantially greater (lower) for target-setting methods that have utilized limited (plenty of) information on past performance and that the ratchet effect increases with ratcheting intensity. These results indicate that information asymmetry between the superior and subordinates is one of the crucial drivers of the ratchet effect. It was also documented that when subordinates sufficiently beat target, the ratchet effect is much greater for relatively “top-down” target setting than that for relatively “bottom-up” target setting. This finding suggests that securing subordinates’ active participation in the target-setting process can alleviate their effort reduction incentive.     

Cooperation in PD Games: Fear, Greed, and History of Play

The impact of the cardinal relationships amongpecuniary payoffs, and of social history and reputation, on thechoice of strategies in four one-shot Prisoner's Dilemma games isexperimentally examined. The results suggest that normalized payoffvalues linked to ``fear'' and ``greed'' are important as predictorsof behavior in the PD games. Success in coordinating on the payoffdominant equilibrium in previous plays of coordination games alsoincreases the probability of cooperative play in the PD games. Theeffect of past play is strongest when individuals are matchedrepeatedly with the same person in previous play, as contrasted tobeing matched randomly with another player.     

Expertise and Bias in Political Communication Networks

Citizens minimize information costs by obtaining political guidance from others who have already assumed the costs of acquiring and processing political information. A problem occurs because ideal informants, typically characterized by the joint presence of political expertise and shared viewpoints, are frequently unavailable or rare within the groups where individuals are located. Hence, individuals must often look beyond their own group boundaries to find such informants. The problem is that obtaining information from individuals located beyond their own groups produces additional costs. Moreover, the availability of ideal informants varies across groups and settings, with the potential to produce (1) context‐dependent patterns of informant centrality, which in turn generate (2) varying levels of polarization among groups and (3) biases in favor of some groups at the expense of others. The article's analysis is based on a series of small‐group experiments, with aggregate implications addressed using a simple agent‐based model.     

Estimation of arrest careers using hierarchical stochastic models

This paper introduces a general procedure using hierarchical stochastic models for characterizing criminal careers within a population of heterogeneous offenders. Individuals engage in criminal careers which are treated as stochastic processes governed by fixed parameters (e.g., a rate parameter), and these parameters come from specified distributions. The parameters of these distributions at the upper level of the hierarchy must then be specified. The models are estimated using data on all persons arrested at least once in the six-county Detroit Standard Metropolitan Statistical Area during the 4 years 1974–1977 for a criterion offense (an index crime other than larceny) and arrested at least once for robbery through April 1979. The collected data set is not a random sample of all such offenders in the population. There is a bias toward selecting those with a higher arrest frequency. In order to make more general inferences, statistical adjustment was needed to overcome the arrest-frequency sampling bias. We construct a series of models for the arrest career and fit the models with the data set of arrests. After correcting biases in the data, we estimate the model parameters using empirical Bayes methods and then examine the resulting models.     

Foe or Friend of GATT Article XXIV: Diversity in Trade Remedy Rules

While the WTO Member countries continue to increase their FTAarrangements with divergent frameworks, they have begun to adoptmodified WTO trade remedy systems in FTAs. Although the contentand degree of these modified systems may not be significantyet, they still set very important precedents, or ‘seeds’,for ‘rule diversification’ in the world tradingsystem. Such modification typically aims to further liberalizemutual trade between FTA parties and thereby contribute to afreer world trading system. However, such rule diversificationappears to be inconsistent with the mandate of Article XXIVof GATT by worsening economically inferior trade diversion.The reinterpretation of the legal obligations in Article XXIVcommensurate with economically more reasonable structures impliesthat trade remedy rules in FTAs should be applied on a non-discriminatorybasis. Moreover, an FTA safeguard measure must precede a WTOsafeguard measure to ensure optimal competitive conditions amongtrading partners. In sum, the right channel for improving thecurrent WTO trade remedy systems is not the FTA forums but theWTO negotiation.