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김봉호 강남대학교 1999 論文集 Vol.34 No.1
기술발전과 더불어 우리나라의 노동시장에서도 현저한 구조변화가 발생하고 있다. 청소년, 여성 및 고령자들이 적극적으로 구직활동을 하는 반면에 저학력 및 미숙련 노동자에 대한 수요는 감소하는 현상이 나타나고 있다. 이러한 미숙련 노동에 대한 수요·공급패턴이 변화하는 상황에서 기술변화가 노동의 이동성이 상대적으로 큰 청소년과 고령자 그리고 여성의 실업율에 어떤 영향을 미칠 것인가를 규명하는 것은 실업문제를 체계적으로 파악할 수 있도록 할 것이다. 더구나 현재와 같이 자연실업율의 증가가 예상되는 시점에서 본 연구가 의도하는 바의 의의가 매우 크다고 하겠다.
通貨衝擊의 變動性이 相對價格의 變動性에 미치는 효果分析
金奉浩 건국대학교 1990 論文集 Vol.31 No.1
Korea has suffered from high inflation rate since the mid-1960's. During this terms money growth rate moved same directions. The purpose of this study is to test money shock effects on the relative price variability. A theoretical explanation of the relationship between price level variance and relative price dispersion was offered by Barro(1976) This model are constructed that individuals possessing incomplete current information and demand and supply in each market reacting to relative price as they are locally perceived. Thus, agents are confronted with the problem of determining whether locally observed price movements are caused by general inflation or by shifts in relative excess demand. The larger the variance of the money supply, the more likely are agents to attribute local price movements to general inflation rather than to relative shifts. To test relation money shock variability and relative price variability, in the first stage we estimated the money supply equation by OLS method. A measure of the variance of the money shock was also estimated. The testing of the relative price variability showed a statistically significant correlation between VPSt-i and VRt. The VPSt-i turned out to have positive coefficient which was marginally significant since VPSt-7. The result consistent with our argument saying the less uncertainty the better.
金奉浩 건국대학교 1986 論文集 Vol.23 No.1
This paper studies mechanism that can be used to make new-classical models produces the persistence of output variability. The new-classical economics replaced the adaptive expectations hypothesis, used by Keynesian and Monetarists with rational expectation hypothesis. By utilizing the rational expectations and natural hypothesis, as well as the continuous market clearing assumption, it asserts that anticipated money growth would have no real output, even in short-run. The demonstration used economic models incorporating an aggregate supply function, a money supply generating feedback rule, and Is-LM curves to represent aggregate demand. Unlerlying the work of Sargent and wallace(1975) is the Lucas(1973) supply hypothesis, which may be written as follow: yt = ynt + a(Pt - Pte)+ u1t, a>0‥‥‥(1) It is implies that (yt) should be a random process, since (u1t) and (Pt - Pte) are both random process, so equation(1) is unlikely to form a basis for an explanation of the persistence of output, because the persistence of output variability implies that there should be serial correlation in (yt). Lucas(1975) Sargent(1979) explained these problems, by condition of a represent firms constraint. Sargent's explanation was based on a adjustment cost. The explanation, chosen by Lucas, was based on an imperfect imformation. But both are very artificial, and should not explain the persistence of output variablity fully. To overcome these model's problem, we examined the role of inventories. In the presence of storable output, the aggregate supply function is modified to a form like. Yt = Ynt + r(Pt - Pte)+ λ(Nt*- Nt)+et ‥‥(2) Equation (2) shows how the stock of inventories and the level of output are affected by unanticipated inflation. Unanticipated inflation reduces the stock of invetories, as sales are incresed in response to what firms regard in part as an Increase in the relative price of output. Then inventories are gradually built up, so in subsquent periods output is higher than it would otherwise have been. Also, inventory models have a significant problems. If desired Inventory holdings are sensitive to the rate of interest, even fully anticipated change in money will have real effects. But all invent. yes madels are not agreed with this. So we must test the relations interest and desired inventory stock. Though new-classical economics have a few problems to be solved, and it's hypothesis are more or less artificial, it have a large contribution to show that individual expectation are formed considering policy variables.
김봉호,신평우,백운규,정연길,최성철,박철원 한국세라믹학회 1995 한국세라믹학회지 Vol.32 No.2
Alumina powders were dispersed using crosslinkable organic molecules by electrosteric stabilization and then consolidated by crosslinking of organic molecules. The effect of processing variables such as the physicochemical properties of both solvent media and organic molecules, the proportions of mixed organic media, etc. were studied. FT-IR was used todeduce the mechanism of organic molecules adsorption on the alumina particle surfaces. The adsorption characteristics and the electrokinetic behavior of alumina suspensions were correlated with the stability of particle in alumina suspension using rheological measurements. The green body of alumina consolidated by the chemical crosslinking of the adsorbed organic molecules after the alumina suspension had been stabilized was tough enough for green machining and the sintered alumina fabricated by this proposed process also showed a high bending strength and a homogeneous microstructure.