The purpose of this study is to identify the causal structure of high-density apartment deterioration, to compare the effects of the current housing supply policies, and to find effective policy measures against apartment deterioration in the time of aging population. For this purpose, this study used literature review and system dynamics simulation method. The results are as follows. First, housing supply through housing site development has increased total number of houses and reduced the proportion of deteriorated houses due to increased supply of new houses. However, total number of old houses has not decreased. Second, housing supply by improving business feasibility of housing reconstruction had little effect on the total housing stock. However, the proportion of old housing converted to new one has increased. Study results show housing supply by securing the business feasibility of reconstruction is more effective than housing supply by developing residential land.

The purpose of this paper is to analyze the smoking control policies (SCPs) in Korea. In order to achieve the purpose, a causal map for all SCPs was drawn firstly. Secondly, a basic System Dynamics simulation model was developed. Due to model simplification and available data limitations, only the important three SCPs related with price, education, counseling and medical treatment were included in the basic simulation model. Finally, some implications were derived through the process of model development and simulation.
The results of the study are as follows. Firstly, the data needed for more accurate SCPs analysis were identified and further investigation of these data at the national level was suggested. Secondly, the relative order of the effects of three SCPs was found. Third, it turned out that the SCPs should be focused on adolescents rather than adults. Finally, several strategies were proposed to enhance the effectiveness of the three SCPs.

The purpose of this paper is to review dynamics between low fertility and local universities finance based on the systems thinking perspective using causal loop analysis.
As a result of analyzing the causal loop diagram between low fertility and the decrease of local university finance, university restructuring policy and reduction of the number of students at the local universities using the systems thinking, the poor mechanism of the local university is hard to improve and it is likely to fall into a vicious circle A positive feedback loop is shown. In addition, as the low fertility and the school-age population continue to decline, the current university restructuring policy may further accelerate the crisis of local universities. Therefore, in order to revitalize local universities, the negative feedback loop should be strengthened through the demand expansion policy of local universities, such as expanding linkages of industry-university cooperation with local-based industries and expansion of allocation of local university to foreign students rather than supply-oriented university policies.

As the primary purpose of this paper, I built a conceptual framework between cooperation, competition, and organizational productivity and tested the possibility as a model using the concept of the “isoquant-isocost” production function and the concept of system dynamics though arbitrary values are applied. One of the main goals in organizations is to maximize their productivity using their limited resources. An important part to maximize something is to decide what resources to choose and how to combine them. In this respect, cooperation and competition among people in organizations is considered as important resources for improving organizational productivity. In both reality and academic studies, cooperation are overemphasized cooperation, and rather, competition are ignored because the formal is perceived positive and the latter is recognized negative. However, cooperation and competition need to be understood along a continuum, not a separate. Cooperation does not improve productivity indefinitely. Thus, the proper level of combination between cooperation and competition can overcome each own limitations and help achieve the level of the productivity that organizations expect. The model in this paper that combined cooperation with competition based on both “isoquant-isocost” production approach in economics and system dynamics approach is expected to shows some insights into both the necessity and way of combining cooperation with competition.