중력형태의 상업시설 입지모형의 비교분석

Comparative Analysis of Gravity-typed Commercial Facility Location Models

1. CONTENTS (1) RESEARCH OBJECTIVES Isaac Newton found Law of Universal Gravitation in 1687. The formal use of the Newtonian model in a social science context was by the English demographer, Ravenstein in 1880s. The Newtonian model has been actively applied in various fields since then. The objective of this research is to compare the properties of gravity -typed commercial facility location models in the respect of the fit between observed and estimated results. (2) RESEARCH METHOD This research is executed by using the several methods such as regression analysis, chi-square test, and adjusting procedure of accessibility factor(F) to observed data. (3) RESEARCH FINDINGS Only the spatial interaction model(chi-square statistic of 3.74), among the three models investigated in this research, is statistically significant in the fit between observed and estimated data. 2. RESULTS The result of this research shows that the fitness of the models depends on consumer's shopping travel patterns. In this respect, the spatial interaction model and entropy spatial interaction model have advantage over Reilly model. Furthermore, the result proves that the spatial interaction model has much better fitness than the entropy spatial interaction model. The reason for it is that the slope of trip distribution curve based on travel distance is relatively steep in this research data. 3. KEY WORDS spatial interaction model, Reilly model, entropy spatial interaction model, chi-square test, regression analysis, accessibility factor