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재무분석가의 명성과 성과 간의 관계 및 명성의 결정요인
안윤영,장진호,조명현 韓國公認會計士會 2006 회계·세무와 감사 연구 Vol.43 No.-
본 연구는 재무분석가의 명성과 성과 간의 관계 및 재무분석가의 명성(높은 재무분석가 순위)을 결정하는 요인에 대해서 살펴보았다. 첫째 재무분석가 순위평가에서 높은 순위를 차지한 재무분석가는 높은 순위를 차지하지 못한 재무분석가들 보다 선정투표가 실시되기 이전기간 및 실시된 이후의 기간 모두에서 이익예측오차 및 주가예측오차가 낮았으며, 많은 기업(산업)을 분석하면서 보고서의 발행빈도가 높음을 보였다. 이는 높은 성과를 보고한 재무분석가가 명성을 획득하며, 명성을 유지하기 위해 높은 성과를 보고해야 한다는 사실을 지지하는 연구결과이다. 둘째 이익예측오차 및 주가예측오차가 낮으면서, 많은 분석보고서를 발행하고, 많은 기업(산업)을 분석한 재무분석가일수록 높은 순위를 차지할 확률이 높았다. 종합적인 분석결과, 우리나라의 재무분석가 시장은 명성과 성과 간에 유의적인 양(+)의 관계가 성립하는 효율적인 메카니즘하에 운영되고 있음을 의미한다. 마지막으로 대형증권사에 소속되어있으면서, 대규모 기업 및 기관투자자지분율이 높은 기업을 분석하는 재무분석가일수록 높은 순위를 차지할 확률이 높았다. 이는 기관투자자의 펀드매니저들에게 익숙한 재무분석가일수록 명성획득 가능성이 높음을 의미하는 결과이다. This paper examines the relations between analyst reputation and performance, and the determinants of financial analyst reputation (higher analyst ranking). First, we find that high-ranking financial analysts produce more accurate forecasts, analyze a larger number of firms and industries, issue more frequently research reports than other analysts during the pre-voting and post-voting period. This finding supports that financial analysts record better performance to obtain and retain the reputation. Second, the likelihood of marking top ranks increases according to the forecast accuracy, the number of research reports issued and the number of covered firms (industries). The currently available evidence, taken as a whole, supports the proposition that Korea's financial analyst market is operated by an efficient mechanism underlining the significantly positive relation between reputation and performance. Finally, those who have worked in top-tier banks or have a broader exposure to the analysis of larger firms or firms of higher institutional investor ownership tend to be among top-ranking analysts. This results indicate those who have a greater exposure to fund managers are likely to be ranked among top five analysts.
우울, 불안 척도를 통해 살펴본 우울증 환자에 대한 한의학적 치료 효과에 대한 연구
안윤영,김락형,유종호 대한한방신경정신과학회 2022 동의신경정신과학회지 Vol.33 No.3
Objectives: To examine clinical effects of Korean medical treatment on depressive disorder. Methods: Medical records of 102 patients diagnosed with depressive disorder who were treated with Korean medical treatment (herbal-medication, acupuncture, Korean psychotherapy) for at least 12 weeks and measured psychological scales (Beck Depression Inventory-II (BDI-II), State-Trait Anxiety Inventory (STAI), Beck Anxiety Inventory (BAI), and State-Trait Anger Expression Inventory (STAXI)) every 4 weeks were analyzed. Results: After 12 weeks of treatment, BDI-II, STAI-X-1/2, BAI, and STAXI-S/T all decreased statistically significantly. STAI-X-1 and BAI were significantly decreased throughout the treatment interval (comparisons every 4 weeks). The other four scales decreased significantly from 0 to 4 weeks and from 8 to 12 weeks. Conclusions: Treatment for depressive disorder with Korean Medicine was effective not only in improving overall symptoms of depressed patients, but also in improving accompanying anxiety, anger, and physical symptoms. In addition, since all scores were gradually decreased, continuous treatment would be important.
생애이력 기반 특고압 전기설비 안전관리 서비스를 위한 시스템 기술 개발
안윤영,정상우 대한전기학회 2022 전기학회논문지 Vol.71 No.12
Accidents occurring in high-voltage electrical equipment cause human injury, so the demand for accident prevention and maintenance of electrical equipment is increasing. ICT technology has been introduced to safety management services, which have been mainly managed based on human, and an electrical safety management system is developing to prevent electrical disasters and electrical equipment failures. The personal electric equipment is defined as a power distribution system that receives the electricity with a voltage of 1000 V or more or a receiving capacity of 75kW or more from a utility and uses the electricity at the receiving location such as a building or a factory. This paper describes the implementation of a system to provide safety management services of electrical equipment based on the life cycle, including the installation, inspection, safety management, and disposal of high voltage electrical installations. And it shows the demonstration site to which the development system is applied.
Voluntary Disclosure, analyst following, forecast accuracy and Dispersion : Evidence from Korea
안윤영,장진호,이정희 대한경영학회 2007 대한경영학회 학술발표대회 발표논문집 Vol.2007 No.1
This paper examines how the frequency of voluntary disclosure is associated with the number of analyst following and the analysts'earnings forecast characteristics. Our results indicate that analysts are more attracted to the firms that provide greater level of voluntary disclosure. Our finding complements prior research that used different measure of disclosure, such as analysts' rating and other information voluntarily disclosed in annual reports. Negative association between the frequency of voluntary disclosure and analysts' forecasts error indicates that more frequent voluntary disclosures lowers analysts' forecast error by reducing the uncertainty in analysts' earnings forecast. We also find that the increased level of voluntary disclosure reduces dispersion of forecasted earnings. Our finding suggests that voluntary disclosure plays a role in reducing information asymmetry between firm and analysts as well as among analysts.
ATM 망에서 ABR 서비스 대역 할당을 위한 Dynamic MB 메카니즘
안윤영,이우섭,박홍식 한국통신학회 1997 韓國通信學會論文誌 Vol.22 No.2
In this paper, we show the movable boundary (MB) method is the effective bandwidth allocation strategy for the ABR service among existing bandwidth allocation methods. The MB method can gurantee the QOS requirement according to the service priority and improve bandwidth utilization using the characteristics of the ABR service. The threshold values of the MB, which have an important effect upon connection blocking probability(CBP) performance of each service, are obtained by simulation. The MB method with the fixed thresholds, however, may not have good performance to variation of input traffic parameters. We suggest the dynamic MB method which changes the threshold values adaptively according to the required bandwidth of input traffic. We also show that the dynamic MB method can urantee the CBP performance according to the service priority regardless of variation of input traffic parameters.