• Title/Summary/Keyword: Output Hypothesis

Search Result 58, Processing Time 0.024 seconds

The Effects of Overseas Output Ratio on Discretionary Accruals and Firm Value (국제다각화가 회계선택 및 기업가치에 미치는 영향)

  • Kim, Chang-Kun;Park, Sang-Bong
    • Management & Information Systems Review
    • /
    • v.36 no.1
    • /
    • pp.291-307
    • /
    • 2017
  • This study analyzes the effects of global diversification level on discretion accruals and firm value. In order to verify the hypothesis of this study, the sample of securities companies was selected from 2012 to 2015, and the final sample is 2,139 firm-year. The results of this paper are as follows : First, discretionary accruals increased as the diversification level increased. We conducted an additional analysis as to whether the increase in information asymmetry due to international diversification affects discretionary accruals. As a result, the increase of information asymmetry due to international diversification increased discretionary accruals. This analysis is consistent with EI Mehdi and Seboui(2001)'s study. Second, we analyze the impact of international diversification on corporate value. In previous studies, there was no consistent conclusion about the relationship between international diversification and firm value(Christophe and Pfeiffer, 2002; Denis and Vost, 2002; Bodnar and Wenintrop, 1997; Bodnar et al., 2003). Therefore, this study hypothesizes that the increase in discretionary accruals, which have been driven by international diversification, will have an impact on firm value. Aa a result of the analysis, we found that the increase in discretionary accruals due to diversification declines the firm value. This means that the increase in discretionary accruals due to diversification is utilized as and opportunistic means by taking individual gain of managers.

  • PDF

A Critical Study on Validity of the Present Purpose of the Public Library Defined in the Korean Library Act ('도서관법(圖書館法)' 중(中) '공공도서관(公共圖書館)의 목적(目的)'에 대한 비판적(批判的) 고찰(考察))

  • Choi, Sung-Jin
    • Journal of the Korean BIBLIA Society for library and Information Science
    • /
    • v.2 no.1
    • /
    • pp.132-177
    • /
    • 1974
  • Toe public library may perform a social good only when its objectives are adequate to the community's needs. The present purpose of the public library in the Korean Library Act has no direct concern for our social needs from its very beginning because it was not created in response to our social needs but transplanted from American principles. It is, therefore. difficult to expect socially useful output of our public library programs under the present purpose which may be inadequate to our social tradition and needs. This study purposes to examine validity of the present purpose of the public library in the Korean Library Act, in the light of our community needs and our own library tradition. The methods employed to achieve the purpose of the study are (1) to survey needs of the library frequenters through questionnaire, and interviews with the public librarians in Seoul, (2) to gather the statistical data relevant to, and supporting, the hypothesis, and (3) to compare our social background with that of the United States of which the American purpose, a model for our present purpose, came out. The conclusion is as follows: A. The idea to induce people to pull themselves upward by providing for all the members of the community access to the world's best books shelved in the public library should be abandoned. The reasons are (1) that the idea is alien in our public library tradition, (2) that little demand of the community goes with the idea, and (3) that reading outside the library has come into wide practice, thanks to recent increase in individual income and that in publications. B. That the public library maintains fiction and other recreational reading materials is meaningless in the light of the community needs. These are the two explanations supporting the thesis. (1) The "uplift" theory has proved inoperative and people apparently do not progress from, light fiction to more respectable fare. (2) The conviction that fiction and other recreational reading materials keep the middling classes from the "vicious" entertainments maintaining order in the community by giving them a harmless source of recreation has lost its significance as the modern society provides a number of choices in recreation: television is an obvious example. C. The nature of the informational needs of the community has radically changed, so radically as to require substantial changes in the outlook, collections, and services of the public library, which is :slow in adopting itself to the new social surroundings in Korea. D. 92.2 per Cent of the present frequenters of the public library are high school and college students. Since the library is to meet the existing community needs it should turn its attention to the student group, and develop the means to serve it better, not the "theoretical group of specialists who do not come to "the public library. E. In revision of the purpose of the public library, priority of each objective should be given. The priorities in the last analysis are research and information. culture, recreation in that order.

  • PDF

Quantitative Flood Forecasting Using Remotely-Sensed Data and Neural Networks

  • Kim, Gwangseob
    • Proceedings of the Korea Water Resources Association Conference
    • /
    • 2002.05a
    • /
    • pp.43-50
    • /
    • 2002
  • Accurate quantitative forecasting of rainfall for basins with a short response time is essential to predict streamflow and flash floods. Previously, neural networks were used to develop a Quantitative Precipitation Forecasting (QPF) model that highly improved forecasting skill at specific locations in Pennsylvania, using both Numerical Weather Prediction (NWP) output and rainfall and radiosonde data. The objective of this study was to improve an existing artificial neural network model and incorporate the evolving structure and frequency of intense weather systems in the mid-Atlantic region of the United States for improved flood forecasting. Besides using radiosonde and rainfall data, the model also used the satellite-derived characteristics of storm systems such as tropical cyclones, mesoscale convective complex systems and convective cloud clusters as input. The convective classification and tracking system (CCATS) was used to identify and quantify storm properties such as life time, area, eccentricity, and track. As in standard expert prediction systems, the fundamental structure of the neural network model was learned from the hydroclimatology of the relationships between weather system, rainfall production and streamflow response in the study area. The new Quantitative Flood Forecasting (QFF) model was applied to predict streamflow peaks with lead-times of 18 and 24 hours over a five year period in 4 watersheds on the leeward side of the Appalachian mountains in the mid-Atlantic region. Threat scores consistently above .6 and close to 0.8 ∼ 0.9 were obtained fur 18 hour lead-time forecasts, and skill scores of at least 4% and up to 6% were attained for the 24 hour lead-time forecasts. This work demonstrates that multisensor data cast into an expert information system such as neural networks, if built upon scientific understanding of regional hydrometeorology, can lead to significant gains in the forecast skill of extreme rainfall and associated floods. In particular, this study validates our hypothesis that accurate and extended flood forecast lead-times can be attained by taking into consideration the synoptic evolution of atmospheric conditions extracted from the analysis of large-area remotely sensed imagery While physically-based numerical weather prediction and river routing models cannot accurately depict complex natural non-linear processes, and thus have difficulty in simulating extreme events such as heavy rainfall and floods, data-driven approaches should be viewed as a strong alternative in operational hydrology. This is especially more pertinent at a time when the diversity of sensors in satellites and ground-based operational weather monitoring systems provide large volumes of data on a real-time basis.

  • PDF

Legislation Cases, Management Policies and Countermeasures on Scientific Data -Focusing Australia, the United States and China- (과학데이터에 관한 입법례와 관리정책 그리고 대응방안 -호주, 미국, 중국을 중심으로-)

  • Yoon, Chong-Min;Kim, Kyubin
    • Journal of Korea Technology Innovation Society
    • /
    • v.16 no.1
    • /
    • pp.63-100
    • /
    • 2013
  • Research data means data in the form of facts, observations, images, computer program results, recordings, measurements or experiences on which an argument, theory, test or hypothesis, or another research output is based. Data may be numerical, descriptive, visual or tactile. Scientific research is changing because of the paradigm shift. It is all being affected by the data deluge, and a data-intensive science paradigm is emerging. Hence, paradigm shift in scientific research led to increase of value and importance of scientific data. Essential to the creative research and development for scientific data can be reused efficiently is the sharing and utilization of establishing management system. Establishing of management system for sharing and utilization of scientific data should be done at the national level, but compared with Europe, Australia, the United States, China, the management system of Korea doesn't have not linkage or efficiency or internal stability. Australia, the United States, China continues to expand a Mid- and Long-Term policy making, legislation, its investment in infrastructure, so as to promote the utilization of data, such as collection, management and maintenance of scientific data through the relevant agencies at the national level. This study consider legislation cases and management policies of the above countries to the end to that establish management system for the efficient and fair sharing and utilization of scientific data and the legal system, and that provide scientific data legislation and policies related to the future of our country.

  • PDF

R&D Activities, Imperfect Competition and Economic Growth (R&D 및 불완전경쟁과 경제성장)

  • Kim, Byung-Woo
    • Journal of Korea Technology Innovation Society
    • /
    • v.10 no.1
    • /
    • pp.47-72
    • /
    • 2007
  • Ideas do not become exhausted, and there are no diminishing returns in the creation of knowledge. Nonetheless, growth ultimately ceases in this simplest model of endogeneous innovation. The reasons are similar to those that are discussed in the context of the neoclassical model of capital accumulation. Even if the resource cost of creating new goods does not rise, the economic return to invention may decline as the number of available products increases. When the rate of return to R&D falls to the level of the discount rate, private agents cease to be willing to defer consumption in order to invest in product development. But, if we treat knowledge capital as a public capital considering of its non-appropriable benefits, economic growth can be sustained in the economy. Romer(1986) has pointed out that growth might be sustainable if the accumulation of knowledge is not subject to long-run diminishing returns. Actually Romer assumed diminishing returns in the production of private knowledge from available resources, but increasing returns in the production of output from labor and total (public and private) knowledge. His condition for the sustainability of long-run growth amounts to an assumption that the diminishing returns in the former activity do not outweigh the increasing returns in the latter. The Johansen(1988) cointegration test method is used for finding long-run equilibrium relationship between R&D input and the product innovation. Test results indicate the existence of cointegrating equation between each pair of regression variables including dependent variable in the knowledge production function. And, the signs of cointegrating vectors are well accord to the prediction of sustainable growth. In the empirical analysis, from all cases of the form for the knowledge production function, we could not reject the null hypothesis that R&D spillover effect is significant($H_{0}:\;{\gamma}=1$). In summary, we showed that considering goodness of fit of regression model, we can see that the empirical evidence is strongly in favor of the character of knowledge as the public knowledge capital. So, we can expect that by product innovation, economic growth can be sustained in the Korean economy.

  • PDF

A Study on Asia Decoupling through the Analysis of Global Value Chain and Trade in Value Added (역내외 밸류체인과 부가가치 교역구조 분석을 통한 Asia Decoupling 가설 검증)

  • Oh, Hyeok-Jong;Kwak, Ro-Sung
    • Journal of the Economic Geographical Society of Korea
    • /
    • v.22 no.4
    • /
    • pp.488-512
    • /
    • 2019
  • This study examines the 'Asia Decoupling' hypothesis, focusing on changes in trade patterns between regions and countries, based on the latest value added trade statistics. As an analytical tool, indicators that can directly measure the degree of distribution of actual value added were used. Main findings are: Firstly, creating potential at regional level which used to be the growth engine of East Asia until the mid-2000s declined sharply after the global financial crisis. Secondly, in the development pattern of the value added distribution network, no positive change has been detected in the give-out or gain capacity of emerging countries that can generate future growth in East Asia through GVC development. Lastly, China's value added contributing capacity, as different from the hub countries in other regions such as US and Germany, has declined significantly since the mid 2000s, while its capability to benefit greatly increased, and the gain potential of advanced group countries in competition with China is decreasing. We suggest the establishment of intra-regional economic cooperation mechanism including all countries in East Asia for expanding the value creating capacity in the region.

A Brief Efficiency Measurement Way for the Korean Container Terminals Using Stochastic Frontier Analysis (확률프론티어분석을 통한 국내컨테이너 터미널의 효율성 측정방법 소고)

  • Park, Ro-Kyung
    • Journal of Korea Port Economic Association
    • /
    • v.26 no.4
    • /
    • pp.63-87
    • /
    • 2010
  • The purpose of this paper is to measure the efficiency of Korean container terminals by using SFA(Stochastic Frontier Analysis). Inputs[Number of Employee, Quay Length, Container Terminal Area, Number of Gantry Crane], and output[TEU] are used for 3 years(2002,2003, and 2004) for 8 Korean container terminals by applying both SFA and DEA models. Empirical main results are as follows: First, Null hypothesis that technical inefficiency is not existed is rejected and in the trasnslog model, the estimate is significant. Second, time-series models show the significant results. Third, average technical efficiency of Korean container terminals are 73.49% in Cobb-Douglas model, and 79.04% in translog model. Fourth, to enhance the technical efficiency, Korean container terminals should increase the handling amount of TEUs. Fifth, both SFA and DEA models have the high Spearman ranking of correlation coefficients(84.45%). The main policy implication based on the findings of this study is that the manager of port investment and management of Ministry of Land, Transport and Maritime Affairs in Korea should introduce the SFA with DEA models for measuring the efficiency of Korean ports and terminals.

Does Pygmalion Leadership Play a Role in the Process of Public Organization members' Self-Efficacy and Organizational Commitment to Customer Orientation? (공공조직 구성원의 자아효능감과 조직몰입이 고객지향성에 미치는 과정 중 피그말리온 리더십이 작용하는가?)

  • Na, Kyung-Soo
    • The Journal of the Korea Contents Association
    • /
    • v.21 no.10
    • /
    • pp.356-367
    • /
    • 2021
  • This study is a study on how much organizational leadership influences customer orientation so that it can secure and maintain a continuous competitive advantage in the rapidly changing environment of corporate management and public organizations. it was approached through theoretical consideration of pygmalion leadership. The purpose of this study is as follows. First, a conceptual definition of the three research variables of pygmalion leadership and its constituent atmosphere, feedback, and output is given. Second, the casual relationship between the conceptually defined three research variables of pygmalion leadership and self-efficacy and organizational commitment was verified. Third, the casual relationship was verified on the extent to which pygmalion leadership influences customer orientation through self-efficacy and organizational commitment, which are parameters. Fourth, through the verification result of the casual relationship between the research variables constituting the research model of this study. It was intended to present an implication. In addition, the significance of direct causal relationships between the research variables of pygmalion leadership, mediating variables, and dependent variables, which constitute the verified research models was verified, and the results of hypothesis testing were presented, and the academic and practical implications of the results of this study were presented.

Risk Analysis for the Rotorcraft Landing System Using Comparative Models Based on Fuzzy (퍼지 기반 다양한 모델을 이용한 회전익 항공기 착륙장치의 위험 우선순위 평가)

  • Na, Seong Hyeon;Lee, Gwang Eun;Koo, Jeong Mo
    • Journal of the Korean Society of Safety
    • /
    • v.36 no.2
    • /
    • pp.49-57
    • /
    • 2021
  • In the case of military supplies, any potential failure and causes of failures must be considered. This study is aimed at examining the failure modes of a rotorcraft landing system to identify the priority items. Failure mode and effects analysis (FMEA) is applied to the rotorcraft landing system. In general, the FMEA is used to evaluate the reliability in engineering fields. Three elements, specifically, the severity, occurrence, and detectability are used to evaluate the failure modes. The risk priority number (RPN) can be obtained by multiplying the scores or the risk levels pertaining to severity, occurrence, and detectability. In this study, different weights of the three elements are considered for the RPN assessment to implement the FMEA. Furthermore, the FMEA is implemented using a fuzzy rule base, similarity aggregation model (SAM), and grey theory model (GTM) to perform a comparative analysis. The same input data are used for all models to enable a fair comparison. The FMEA is applied to military supplies by considering methodological issues. In general, the fuzzy theory is based on a hypothesis regarding the likelihood of the conversion of the crisp value to the fuzzy input. Fuzzy FMEA is the basic method to obtain the fuzzy RPN. The three elements of the FMEA are used as five linguistic terms. The membership functions as triangular fuzzy sets are the simplest models defined by the three elements. In addition, a fuzzy set is described using a membership function mapping the elements to the intervals 0 and 1. The fuzzy rule base is designed to identify the failure modes according to the expert knowledge. The IF-THEN criterion of the fuzzy rule base is formulated to convert a fuzzy input into a fuzzy output. The total number of rules is 125 in the fuzzy rule base. The SAM expresses the judgment corresponding to the individual experiences of the experts performing FMEA as weights. Implementing the SAM is of significance when operating fuzzy sets regarding the expert opinion and can confirm the concurrence of expert opinion. The GTM can perform defuzzification to obtain a crisp value from a fuzzy membership function and determine the priorities by considering the degree of relation and the form of a matrix and weights for the severity, occurrence, and detectability. The proposed models prioritize the failure modes of the rotorcraft landing system. The conventional FMEA and fuzzy rule base can set the same priorities. SAM and GTM can set different priorities with objectivity through weight setting.

A Study on the Role of Models and Reformulations in L2 Learners' Noticing and Their English Writing (제2 언어학습자의 주목 및 영어 글쓰기에 대한 모델글과 재구성글의 역할에 관한 연구)

  • Hwang, Hee Jeong
    • The Journal of the Korea Contents Association
    • /
    • v.22 no.10
    • /
    • pp.426-436
    • /
    • 2022
  • This study aimed to explore the role of models and reformulations as feedback to English writing in L2 learners' noticing and their writing. 92 participants were placed into three groups; a models group (MG), a reformulations group (RG), a control group (CG), involved in a three-stage writing task. In stage 1, they were asked to perform a 1st draft of writing, while taking notes on the problems they experienced. In stage 2, the MG was asked to compare their writing with a model text and the RG with a reformulated version of it. They were instructed to write down whatever they noticed in their comparison. The CG was asked to just read their writing. In stage 3, all the participants attempted subsequent revisions. The results indicated that all the participants noticed problematic linguistic features the most in a lexical category, and models and reformulations led to higher rate of noticing the problematic linguistic features reported in stage 1 and contributed to subsequent revisions. It was also revealed that the MG and RG significantly improved with their writings of MG and RG on the post-writing test. The findings imply that models and reformulations result in better performance in L2 writing and should be promoted in an English writing class.