http://hdl.handle.net/2344/47 Sun, 19 May 2013 11:43:57 GMT 2013-05-19T11:43:57Z http://hdl.handle.net/2344/1227 タイトル: The location of manufacturing firms and imperfect information in transport market 著者: Gokan, Toshitaka 抄録: It is well know that transport charges are not symmetric: fronthaul and backhaul costs on a route may differ, because they are affected by the distribution of economic acitivities. This paper develops a two-regional general equilibrium model in which transport costs are determined endogenously as a result of a search and matching process. It is shown that economies or diseconomies of transport density emerge, depending on the search costs of transport firms and the relative importance of the possibility of backhaul transportation. It is found that the symmetry of the distribution of economic activity may break owing to economies of transport density when the additional search costs are small enough. Thu, 28 Feb 2013 15:00:00 GMT http://hdl.handle.net/2344/1227 2013-02-28T15:00:00Z http://hdl.handle.net/2344/1226 タイトル: Search, matching, and self-organization of a marketplace 著者: Ding, Ke; Gokan, Toshitaka; Zhu, Xiwei 抄録: In many developing countries, clusters of small shops are the typical market-place. We investigate an economic model in which, between buyers and sellers in a marketplace, a circular causality including the search process produces agglomeration forces, given the initial location of the marketplace location exogenously in a linear city. We conclude that initial number of buyers and sellers is important in forming a large marketplace. Thu, 28 Feb 2013 15:00:00 GMT http://hdl.handle.net/2344/1226 2013-02-28T15:00:00Z http://hdl.handle.net/2344/1202 タイトル: Parameterization of applied general equilibrium models with flexible trade specifications based on the Armington, Krugman, and Melitz models 著者: Oyamada, Kazuhiko 抄録: This paper explains how the Armington-Krugman-Melitz supermodel developed by Dixon and Rimmer can be parameterized, and demonstrates that only two kinds of additional information are required in order to extend a standard trade model to include Melitz-type monopolistic competition and heterogeneous firms. Further, it is shown how specifying too much additional information leads to violations of the model constraints, necessitating adjustment and reconciliation of the data. Once a Melitz-type model is parameterized, a Krugman-type model can also be parameterized using the calibrated values in the Melitz-type model without any additional data. Sample code for the General Algebraic Modeling System (GAMS) has also been prepared to promote the innovative supermodel in the AGE community. Mon, 31 Dec 2012 15:00:00 GMT http://hdl.handle.net/2344/1202 2012-12-31T15:00:00Z http://hdl.handle.net/2344/1190 タイトル: 貿易結合度の適切な応用についての考察 著者: 熊谷, 聡 抄録: 二国間の貿易関係の強さを分析する際に用いられる簡便な指標として，貿易結合度（trade intensity index）がある。貿易結合度については，基準となる貿易額を計算する際に，自国同士の貿易がないことを考慮するかどうかについて，その重要性に反して，ほとんど議論が行われないままとなっている。本論では，自国同士の貿易がない点を考慮しない「標準」貿易結合度に対して，その点を考慮した指数を「修正」貿易結合度と呼び，両者を比較する。どのような場合にどちらの指数を用いるべきか，また，誤った指数を用いることでどのような影響がどのような大きさで出る可能性があるのかを詳しく検討し，両指数の望ましい使用方法を提示する。 Wed, 29 Feb 2012 15:00:00 GMT http://hdl.handle.net/2344/1190 2012-02-29T15:00:00Z