Bone age assessment: the applicability of the Greulich-Pyle method in eastern Turkish children

The aim of this study was to investigate whether or not the Greulich-Pyle (GP) method is adequate for Turkish children. A group of 767 individuals (425 girls and 342 boys) between 7 and 17 years were studied. Bone age (BA) from plain radiographs of left hands and wrists by GP standards was estimated. The total mean differences between BA and chronological age (CA) for girls and boys were found to be 0.20 and -0.13 years, respectively. There were significant differences between BA and CA in age groups 7-, 8-, 10-, 11-, 12-, 13-, 15-, and 16-year-olds for girls and 7-, 10-, and 12-year-olds for boys. The results of this study suggest that the mean differences between BA and CA are low enough to be of no practical significance, and thus, for the time being unless any other methods will be proved more useful, this method could be used in all age groups.     

Does Minority Representation in Police Agencies Reduce Assaults on the Police?

Following recent high-profile deaths of unarmed African American suspects at the hands of police, a number of reforms have been proposed, among them improved minority representation in the ranks of law enforcement organizations. Previous research has explored the effects of minority representation on complaints against the police and other behaviors, but very few studies have examined violence toward the police. We merged several data sources together and tested the hypothesis that minority representation within police departments is inversely associated with assaults against the police. In an extension of prior research, we also conducted separate analyses for African American, Hispanic, and Asian officer representation. The results did not support the expectation that diversity within police organizations results in improved police-citizen interactions, as measured by assaults on police. This study is one of the few to examine how different measures of minority representation in police agencies relates to assaults on the police.     

Teacher Incentives and Student Achievement: Evidence from an Advancement Program

This paper examines the effects of a comprehensive performance pay program implemented in high‐need schools using administrative data from Louisiana. Exploiting the within‐student variation in the timing of implementation, we find a large and significant effect beginning with the second year of the program on math achievement. Similar but generally insignificant point estimates are observed in social studies. As for English Language Arts and science, there are no effects of the program. We provide evidence against changes in the composition of teacher workforce and postadoption student sorting as potential explanations for our results. We then show aggregate findings from a web‐survey that teachers may have altered their teaching practices following performance‐based compensation. Finally, under certain assumptions, we calculate the net present value of earnings impact to be close to a million dollars per school‐year for math.     

Prevalence of alcohol in blood samples from traffic accident cases in Turkey

Alcohol is one of the main causes of traffic accidents worldwide. With a population of 70 million, 12 million vehicles, and 18 million drivers (16% women), Turkey is one of the European countries that has a high incidence of road traffic accidents.In accordance with Turkish laws, subjects were considered to be positive when alcohol blood concentration exceeded 50 mg/100 mL. The objective of the present study was to obtain reliable and comparable data about alcohol use in traffic cases in Turkey. All cases are admitted to the emergency department at Ege University Medical Faculty. The cases from police officers are described as traffic control cases. Alcohol was detected in the blood of about 54.4% of the traffic-related cases during October 2005 to March 2007. It has been observed that, in 17.4% of the traffic accident cases, the blood alcohol level was 50 mg/dL or less, which is the legal limit in Turkey for car drivers. Alcohol prevalence was 57.2% in male cases and 43.6% in female cases. In alcohol-positive cases; the ratios for males were 1.73 times more frequent in traffic-related cases. Prevalence data will help traffic safety professionals to adequately allocate resources and plan future efforts in reducing drinking-and-driving behavior and thereby reduce traffic accidents.     

What Do Right‐to‐Work Laws Do? Evidence from a Synthetic Control Method Analysis

Using the case study of Oklahoma and a recently developed econometric technique, we examine the impact of right‐to‐work (RTW) laws on state‐level labor market outcomes. Our results show that the passage of RTW laws in Oklahoma decreased private sector unionization rates. Several other state outcomes including total employment rate and private sector average wages, on the other hand, were not affected by RTW laws. The findings for the private sector generally carry over to the manufacturing sector.     

Who does better for the economy? Presidents versus parliamentary democracies

Are certain forms of government associated with superior economic outcomes? This paper attempts to answer that question by examining how government systems influence macroeconomic performance. We find that presidential regimes consistently are associated with less favorable outcomes than parliamentary regimes: slower output growth, higher and more volatile inflation and greater income inequality. Moreover, the magnitude of the effect is sizable. For example, annual output growth is between 0.6 and 1.2 percentage points lower and inflation is estimated to be at least four percentage points higher under presidential regimes relative to those under parliamentary ones. The difference in distributional outcomes is even starker; income inequality is 12 to 24% worse under presidential systems.     

Is the Assessment of Dental Age by the Nolla Method Valid for Eastern Turkish Children?

The aim of this study was to investigate whether or not the Nolla method is appropriate for Turkish children for the determination of the dental age (DA). A group of 719 children between the ages of 6 and 18 years were included in the study. DAs from orthopantograms by the Nolla method were estimated. The results obtained were compared with chronologic age (CA). Paired t and the Wilcoxon tests were performed. Both genders were underestimated in dental maturity when compared with the reference samples in total (-0.3 years) (p<0.01). The differences in girls were statistically significant in total and in all groups except for 7-7.9. The differences in boys between the CAs and DAs were not statistically significant in total and in all groups except for 7-7.9 and 8-8.9. Although the accuracy of this method was suitable for boys, according to our findings, it was not suitable for girls.     

Cold war era relations between West Germany and Turkish political Islam: from an anti-communist alliance to a domestic security issue

ABSTRACT

West Germany played a significant role in the growth of Political Islam in Turkey during the Cold War. By recruiting from among Turkish workers in West Germany, Islamist organizations and the religious communities known as cemaats acquired significant economic revenues, which they used to fund their activities in Turkey. Moreover, West Germany served as a liaison between Turkish Islamists and Syrian and Egyptian Muslim Brotherhood members, who have influenced Political Islam in Turkey since the 1960s. Prominent Muslim Brotherhood representatives in West Germany took on important roles in the recruitment of Turks and also played some part in shaping the ideological development of Turkish Islamists. Due to the pervasiveness of anti-communism in West Germany and Turkey during the Cold War, the established orders in both countries viewed Political Islam as an antidote to the ascendancy of the Left. However, in the 1980s, Bonn and Ankara grew concerned about Islamist organizations becoming further radicalized and impossible to control; the two governments often cooperated in order to bring Political Islam under their own authority.