While a reduction in import barriers in a partial equilibrium may be thought to lead to an increase in imports and a reduction in trade surplus, the general equilibrium effect can go in the opposite direction. We study how trade reforms affect current accounts by embedding a modified...

This paper develops a new theory of international economics by introducing Heckscher-Ohlin features of intra-temporal trade into an intertemporal trade approach of current account. To do so, we consider a dynamic general equilibrium model with tradable sectors of different factor intensities,...

Both horizontal and vertical innovations are studied in this paper, using monopolistic and oligopolistic competition models with multiproduct firms. We consider a two-stage game. In the first stage, all firms simultaneously choose their own number of products. In the second stage, firms make...

Using a dynamic general equilibrium model with many goods and many factors, this paper studies the adjustment process in a transition from one equilibrium to another. Applying a search process, an adjustment technique is developed to link the product and factor markets. Then an optimal control...

Harberger (1971) proposes that the consumer surplus should be used to measure the individual utility and the social welfare. "Since Harberger's paper, the limitation and pitfall of consumer's surplus have been demonstrated systematically and definitively by Chipman and Moore among many others"...

We develop a microstructure model of a market for a homogeneous good in which trade amongst heterogeneous consumers and producers is intermediated by middlemen and oligopolistic market makers (gatekeepers). Market makers post bid and ask prices which are freely observable. Middlemen stand ready...

Government redistribution is increasingly important in today's world. The effect of income distribution on industrialization and growth, and the causes of income redistribution have been studied in the contemporary literature. The normative significance of income redistribution, however, which...

By showing that increases in the sum of aggregate income and aggregate Marshallian consumer surplus represent potential Pareto improvement, this paper builds a theoretical ground for using aggregate Marshallian consumer surplus as a social welfare indicator. The optimal income distribution that...

The monopolistic competition model is suitable for markets with a large group of relatively small firms. However, it hardly describes oligopoly markets where several multi-national companies dominate the markets and each giant firm produces a large number of products. Such a market structure...

Firms' proliferation behavior in a differentiated product market is studied using an oligopolistic competition model with multiproduct firms. The model has the following characteristics: (1) the elasticity of substitution across firm's own products and the elasticity of substitution across...