http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : ( Hyung Seok Eric Kim ) (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
-
Asset Pricing Implications of Equilibrium Business Cycle Models: Operating Leverage Redux
( Hyung Seok Eric Kim ) 한국금융연구원 2011 금융연구 Vol.25 No.2
Operating leverage, the observation that the share of capital is riskier than the share of labour due to the priority status of wage claims over the business cycles, has been believed to be relevant to a resolution of the equity premium puzzle. This paper asks whether asset pricing fluctuations induced by operating leverage are empirically plausible. We find that operating leverage generated by our Taylor-type staggered Nash wage bargaining in an equilibrium business cycle model with flows in and out of employment is relevant for justifying a sizable equity premium while it keeps the low volatility of risk-free rates intact. We also identify GHH preferences (Greenwood et al. (1988)) as a necessary ingredient in order for the proposed model to be appropriately calibrated on the macro side.
-
습관성선호를 가진 거시자산가격결정모형의 재고찰: 비가분성선호와 임금경직성의 역할
김형석 ( Hyung Seok Eric Kim ) 한국응용경제학회 2010 응용경제 Vol.12 No.3
대표적 경제주체(representative agent)를 가진 표준 실물경기변동모형(standard one-sector real business cycle model)에서 노동시간과 여가의 상충관계를 통한 노동공급의 내생화가 전제된다면 습관성선호(habit formation)와 자본량 조정비용(costs of adjusting capital)을 고려하더라도 위험자산프리미엄(equity risk premium)이 극히 낮거나 사실상 존재하지 않음이 잘 알려져 있다. 본 논문에서는 (1) 여가와 소비 사이의 비가분성선호(non-separable preferences) (2) 실질임금의 경직성(real wage rigidity) 등 두 가지 요소를 고려하여 경기변동모형 하에서 위험자산프리미엄의 증가가 가능한지를 다루고자 한다. 모형의 수량적 분석결과, 소비와 여가의 비가분성선호와 임금경직성을 동시에 고려할 때 노동시간의 내생적 조정이 있더라도 위험자산프리미엄이 존재할 수 있음을 보인다. 특히 임금경직성의 내생적 전파경로가 모형경제의 분산 불가능한 위험(non-diversifiable risk)을 증가시킬 수 있음을 보인다. 또한 모형경제의 분산 불가능한 고위험의 존재와 내생적 임금경직성이 노동시장의 탐색과 짝 맞추기에 근거한 노동변수의 변동성과 무관함을 보인다. A number of authors show that the standard one-sector RBC model with real rigidities such as habit formation and costs of adjusting capital cannot generate a substantial equity premium if the agent`s endogenous labour-leisure choice is allowed. In this paper, we seek to reconcile this conflict by considering two elements: (i) parsimonious non-separable preferences in consumption and leisure and (ii) (real) wage rigidity. We find that a real business cycle model with variable labour supply can still generate a substantial equity premium with both non-separable preferences (GHH preferences) and wage rigidity, not with either taken separately. We also find that asset price dynamics and unemployment dynamics due to Mortensen and Pissarides can be separated: both the large equity premium and smooth wage dynamics can be generated independently of observed excessive unemployment fluctuations.
-
A p53/miRNA-34 axis regulates Snail1-dependent cancer cell epithelial–mesenchymal transition
Kim, Nam Hee,Kim, Hyun Sil,Li, Xiao-Yan,Lee, Inhan,Choi, Hyung-Seok,Kang, Shi Eun,Cha, So Young,Ryu, Joo Kyung,Yoon, Dojun,Fearon, Eric R.,Rowe, R. Grant,Lee, Sanghyuk,Maher, Christopher A.,Weiss, Ste The Rockefeller University Press 2011 The Journal of cell biology Vol.195 No.3
<▼1><P>Expression of the essential EMT inducer Snail1 is inhibited by miR-34 through a p53-dependent regulatory pathway.</P></▼1><▼2><P>Snail1 is a zinc finger transcriptional repressor whose pathological expression has been linked to cancer cell epithelial–mesenchymal transition (EMT) programs and the induction of tissue-invasive activity, but pro-oncogenic events capable of regulating Snail1 activity remain largely uncharacterized. Herein, we demonstrate that p53 loss-of-function or mutation promotes cancer cell EMT by de-repressing Snail1 protein expression and activity. In the absence of wild-type p53 function, Snail1-dependent EMT is activated in colon, breast, and lung carcinoma cells as a consequence of a decrease in miRNA-34 levels, which suppress Snail1 activity by binding to highly conserved 3′ untranslated regions in Snail1 itself as well as those of key Snail1 regulatory molecules, including β-catenin, LEF1, and Axin2. Although p53 activity can impact cell cycle regulation, apoptosis, and DNA repair pathways, the EMT and invasion programs initiated by p53 loss of function or mutation are completely dependent on Snail1 expression. These results identify a new link between p53, miR-34, and Snail1 in the regulation of cancer cell EMT programs.</P></▼2>
-
( John B Donaldson ),( Hyung Seok Eric Kim ) 한국국제경제학회 2014 한국국제경제학회 동계학술대회 Vol.2014 No.1
Beginning with Shimer (2005) and Hall (2005), business cycle theory has explored the role of wage rigidity in accounting for the statistcal characteristics of key labor market cariables over the business cycle; in particular, high vacancy and unemployment volatility and a high negative corre-lation between the two. As a further exploration, we extend the Mortensen-Pissarides structure of period-byperiod Nash wage bargaining to an environment where there is labor force heterogeneity (permanently employed "insiders" and "outsiders" subject to separations) and limited participation in the financial asset markets. We show that a reasonable calibration of the resulting model sat-isfactorily accounts not only for aggregate fluctuations in unemployment and vacancies and their cross-correlations but also for the observed wedge between variations at the intensive margin (hoursper worker) and at the extensive margin (total hours). The model also achieves a satisfactory repli-cation of the major financial return phenomena; namely.a low risk-free rate, a high equity premium, and an upward sloping term structure. The key to these results is the variable income insurance effectively provided by shareholders and given to workers arising from the interaction of Nash wage bargaining superimposed on the incomplete financial market structure. We refer to the variable income insurance as (income) distribution risk.
-
비전 프로세싱을 이용한 학재진압 DARwIn-OP 시스템
이은섭 ( Eun-seop Lee ),이동형 ( Dong-hyung Lee ),김경태 ( Kyeong-tae Kim ),( Adith Jagadish Boloor ),나요안나 ( Amy Wagoner ),정주은 ( Yo-an-na Na ),고석주 ( Ju-eun Jung ),( Seok-joo Koh ),( Eric T. Matson ) 한국정보처리학회 2014 한국정보처리학회 학술대회논문집 Vol.21 No.2
이 논문에서, 우리는 휴머노이드 로봇인 다윈에 내장되어 있는 색 접근법을 이용한 비전 프로세싱을 통해 학재가 난 위치에 접근하며, 적정거리에 도달했을 경우, 다윈의 손에 들고 있는 분무기로 학재를 진압 하도록 하는 “학재진압다윈”을 만들었다. 여러 논문에서 학재진압용 로봇들을 소개하였지만, 우리는 다윈이라는 휴머노이드 로봇을 이용하여 학재를 진압하도록 하였다. 아직까지 휴머노이드 로봇을 실용적으로 사용하기에 많은 문제들이 존재한다. 하지만 휴머노이드 로봇 분야는 사람이 할 수 있는 사다리 타기, 계 단 오르기, 장비 다루기 등과 같은 여러 가지 기능들을 수행할 수 있음으로 많은 잠재력을 가지고 있다. 이번 리서치에서 시도한 학재진압다윈 역시 실용적인 부분에서는 아직 많은 미흡한 점들이 있지만, 미래의 잠재력에 한발자국 나아갔다는 부분에 있어서 많은 의의를 둔다.
KCI연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
