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- W3146035722 abstract "The gravity model is widely used to estimate the movement of people and goods. We use the gravity model to explain the characteristics of the movement of Korean people between and within cities via various modes of transportation using data from 246 county/district-level municipalities. We use a PPML gravity model to run regression analyses of traffic at three spatial levels: the national level (all of Korea), metropolitan level (in the Seoul and Busan Metropolitan Transportation Areas (MTAs)), and city-level (in Seoul and Busan). For these geographical areas, we use two variables to represent gravitational mass in the model – regional population and regional GDP per capita (RGDPPC). Introducing regional GDP per capita improves the model fit over all the spatial ranges, but the greatest improvement is at the city level. While the exponent parameter for distance diminishes as spatial ranges decrease, the parameters for population and RGDPPC and their relative ratio remain fairly constant. More traffic is associated with both higher population and higher levels of economic activity, represented by RGDPPC. These parameters can be understood in the model as corresponding to the number of particles and specific density of masses in Newton’s gravity law. Based on this result, we suggest the concept of economic activity-adjusted population." @default.
- W3146035722 created "2021-04-13" @default.
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- W3146035722 date "2020-01-01" @default.
- W3146035722 modified "2023-09-24" @default.
- W3146035722 title "Two Kinds of Gravitational Forces in Transport: An Analysis Using the Gravity Model" @default.
- W3146035722 doi "https://doi.org/10.2139/ssrn.3563913" @default.
- W3146035722 hasPublicationYear "2020" @default.
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