Earticle

In urban planning, center identification has been one of the most important subjects in terms of urban growth management and efficiency. Therefore, many studies have investigated more accurate and efficient methodology in order to identify the urban center such as employment density, network concentration density and land price gradient. They have used the administrative boundary as the spatial analysis unit because almost all data are collected by it. However, it has serious limitation in detecting the accurate boundary of urban center because it is restricted within the existing administrative unit boundary. This study suggests the Density-Based Clustering (DENCLUE) method as the alternative which identifies more accurate urban center boundary. We examined pros and cons of DENCLUE method on the Gangnam subcenter identification with 9-Dong employment data. The results showed that DENCLUE can improve the accuracy of center identification and expectation power about future growth of center. In fact, the center identification results by DENCLUE are significantly different from those by the existing methods which use administrative unit.

After the deregulation of land use control in the suburbs of Seoul metropolitan, factories which used to be located in cities have sprawled out into the fringe of the urban area. Korean government has tried to regulate unplanned factories' location and gather them in some areas having infrastructure for over 15 years, but the government has been struggling with the same issue. This study tries to find out the reason why the factories are going over spreading into the suburbs by combining AHP(analytic hierarchy process) and Likert technique. With the empirical analysis this study could show three finding as following. First, the relative weights for the decision elements of unplanned factories' location in the suburbs are defined. Second, land price is the most decisive element among the decision factors. It is clear that the government can not be easily control the unplanned factories' location without the supply of cheap land price under current land use system. Third, the demand for joining spatial and industrial planning is found. The factories want to find the location which satisfies the decision elements this study finds. Those elements consist of spatial as well as industrial elements. This study shows the demand factors of unplanned factories into suburbs. There are, however, several limitations; the survey sample is came from the just one part of Seoul metropolitan area and AHP's basic limitations are not clearly overcome. Following studies are needed to overcome those limitations to give clear advise to the government for the old hot issue.

Historically, the zoning regulation have been introduced in an effort to suppress the disorderly mix of land uses and consequent negative externalities so that the asset value of the real properties could be safely preserved. For the purpose, the Euclidean zoning have adopted the hierarchical/cumulative and exclusive allocation of land uses by grouping an in-kind uses of land. On the other hand, however, the zoning system also has been criticized in that it brought about unexpected consequences such as residential segregation and increasing commuting distances. Furthermore, some have even claimed that it has no effects in sheltering the real asset values. This study, in this context, tries to review the theoretical debates surrounding such issues as above and to empirically investigate the changes in land prices that occur due to the up-zoning case in urban districts, taking Wangshimri area in Seoul City as the study area. The study specifies a hedonic price model composed of various independent variables representing the physical and locational characteristics that are assumed to contribute to the land price. The explaining power of the model (the R-squared value) is estimated to be 0.85, and most of the explaining variables show high levels of significance. The regression analysis clearly evidences significant influences of up-zoning on the rising land prices.

This study deals with the CBD's decline of large cities with 500-1,000 thousands population. The purposes are 1) to analyze the change of population centroid over time with respect to CBD and center of area by city, and 2) to model the dispersion and crater phenomenon over time using the distance from CBD which is an explanatory variable. The main results are the followings. First, three centroid change patterns are analyzed, which are the types of one-direction expansion, circular expansion and stationary state. Second, the population density distribution models which are all statistically significant are developed. According to the dispersion index, 12 cities are divided as three types which are the decreasing, decreasing after increasing, and the others. Finally, 3 cities which are Cheongju, Cheonan and Suwon are analyzed to have the crater phenomenon.

The purpose of this paper is to analyze the fundamental elements for constructing the better public-owned open spaces in order for them to activate the roles of relaxation and amenity for citizens. Two distinguished residential and commercial areas within the City of Seoul are selected for the empirical analysis of the research. From the results of regression analysis, it is found out that elements associated with managing condition, the number to the public road, the size have the priority for the residential area in constructing public-owned open space. The width of entrance and the accessibilities to the public transportation, on the other hand, are more important for the commercial area. Finally, it is maintained that the fundamental elements for constructing the better public-owned open space should be changed depending upon the current land-use of surrounding areas.

The purpose of this study is to investigate operating problems of the rebuilding project consulting system empirically and to offer an alternative plan by studying the press release and a survey in order to complement the unprofessionalism of a union and promote the efficient rebuilding project on housing renewal projects in old built-up areas. Although the system has positive effects since it has been made up for the unprofessionalism of an rebuilding union and helped the union improving its service, there are some negative opinions which are a shortage of the specialty of professional consultants and an initial financing problem. The introduction of this system requires to break a wrong common practice and culture on rebuilding project and to design a new paradigm and desirable culture. However, even though there is a perfectly designed system, it is not going to be revitalized and expected a successful project without enough professionals and finance to operate the system. It is the time to improve the system with a specialty guarantee and initial financing to be a successful rebuilding project consulting system as two wheels of wagon roll by delivered power from the central axis.

The Input-Output(IO) model and tables has been usefully used in many different areas of Economics since the model was first pioneered by W. W. Leontief in 1936. Recently Gim and Kim(2005, 2008) found out that there is no consecutive connection between the Leontief inverse and the total output and that there are some limits to compute the impact effects for the initial change of output. The specific objectives of this paper are summarized as follows. ① We clarify the usefulness and limits which is embodied in the open static input-output model as an empirical study. ② We reexamine why the development of a new＂alternative model＂for the traditional Input-Output model is needed. ③ We propose the two alternative models named the Output-Output(OO) model and the Final demand-Final output(FF) model based on the merits and demerits of the model. We finally developed an Output-Output model on the basis of the concept of output requirements matrix for output , in comparison to the IO model. The newly developed OO model can be readily applied, for example, to the impact analysis for output advantageously and effectively without worrying about the consecutive connection and overestimation problems occurred in the net multiplier concept developed by Oosterhaven(2002).

본 연구는 서울 뉴타운개발이 주변 아파트 가격에 미치는 영향을 분석하였다. 본 연구는 뉴타운개발의 형태를 주거중심형과 주거·상업·업무 기능이 복합된 도심형의 두 가지로 구분한 후 뉴타운개발의 형태에 따라서 뉴타운개발이 인근지역의 아파트 가격에 미치는 영향을 분석하였다. 공간헤도닉모형을 이용한 분석결과에 의하면 아파트 가격에 공간자기상관이 존재하기 때문에 서울 주택시장의 아파트가격 분석을 위해서는 공간헤도닉모형이 적합함을 알 수 있었다. 뉴타운개발 형태별 분석은 도심형 인근지역의 아파트 가격이 주거중심형 인근지역의 아파트가격보다 더 크게 상승하는 결과를 보여주었다. 마지막으로, 뉴타운개발이 인근지역 아파트 가격에 미치는 영향은 뉴타운개발 발표 직후부터 발생하기 시작했음을 알 수 있다.