【応用ミクロ経済学・産業経済学ワークショップと共催】

要旨：We propose a novel long-term migration dynamics that can overcome the equilibrium indeterminacy of Core-Periphery (CP) model a la Krugman [1991b]. This goal is achieved by introducing uncertainty of economic environment into CP model with forward-looking migration dynamics. We show that an equilibrium path of migration dynamics can be uniquely determined in accordance with each stochastic sample path.

要旨：In this paper, we focus on the impacts of trade on workers' skill formation and wage structure in the presence of heterogeneous workers. As unskilled, workers are identical in their productivity. If workers train himself / herself, he/she becomes a skilled worker. We assume that workers are heterogeneous in their training costs. With above settings, we show that trade openness enhances skill formation and raises the real wage disparity between skilled and unskilled workers though it makes welfare of all agents better off. In addition, trade openness leads to rises in income inequality in some parameter ranges. Finally, we show that compared to export, FDI enhances skill formation, when the fixed costs for FDI is small, or the number of trade partner countries is large, or transport costs of manufactured goods are high.

要旨：We analyze wholesale pricing and retail pricing when a monopolistic manufacturer sells its product to conventional retailer and electronic retailer. As a result we show wholesale price discrimination between conventional retailer and electronic retailer. This reason is that a monopolistic manufacturer wants retailers to compete heavily in the retail market and a monopolistic manufacturer charges higher wholesale price to the retailer having an advantage in the retail market. This behavior of a monopolistic manufacturer distorts a fair retailers' competition and we also show that social welfare is improved at most cases if the government regulates wholesale price discrimination.

要旨：In this paper, we examine the existence of agglomeration economies on production in the Japanese manufacturing industry using plant-level 4-digit SIC data and new agglomeration and co-agglomeration indices for 1985, 90, 95, and 2000. This agglomeration and co-agglomeration indices are calculated in Tokunaga and Akune (2004, 2005), and Tokunaga, Kageyama, and Akune (2005), based on Ellison and Glaeser (1997). Using a flexible translog production function and cost share equation as suggested by Kim (1992), we found that positive agglomeration economies on production in the Japanese manufacturing industry exist in absence of any restriction on homotheticity.

要旨：As the rapid development of broadband Internet access services continues, particularly fiber to the home (FTTH) services, the digital divide between provincial and urban areas is becoming a big social issue in Japan. We classify the issue into two problems: access to high-speed Internet and service utilization of high-speed Internet access. This paper focuses on the latter problem by quantitatively and qualitatively investigating whether a digital divide problem exists based on Internet service utilization. Consequently, we discover that willingness to pay (WTP) for public services over FTTH is almost identical between provincial and urban areas. Furthermore, territorial digital broadcasting over FTTH accounts for a large part of WTP in provincial areas, while tele-working and tele-education are also important as public services over FTTH in urban areas.