Pomeron dynamics in the AdS space and structure functions of hadrons at small x

The Pomeron dynamics is investigated via deep inelastic scattering (DIS) at small x in the framework of holographic quantum chromodynamics. The small x DIS process is assumed to be described by the graviton exchange between external vector current and hadron in the AdS space. Our calculations for $F_2^p$, $F_2^\pi$, as well as the longitudinal counterpart $F_L^p$ are consistent with the experimental data. We discuss origins of a difference between $F_2$ and $F_L$ in our approach.Comment: 4 pages, 3 figures, contribution to the proceedings of QCD@Work 2012: International Workshop on QCD - Theory and Experiment, June 18-21, Lecce, Ital

Chiral multicritical points driven by isospin density in the Ginzburg-Landau approach

We study how a chiral tricritical point (TCP) on QCD phase diagram is affected by the imbalance of up and down quark densities (isospin density), using the generalized Ginzburg-Landau (GL) approach. The resulting phase diagram near TCP shows a rich fine structure which includes inhomogeneities of both the chiral and the charged pion condensations. It turns out that the TCP splits into multicritical points.Comment: 4 pages, 2 eps figures. Presented at QCD@Work 2012: International Workshop on QCD - Theory and Experiment, June 18-21, Lecce (Italy

INTER-COUNTRY GAPS IN INCREASlNG-RETURNS-TO-SCALE TECHNOLOGIES AND THE CHOICE AMONG INTERNATIONAL ECONOMIC REGIMES

The recent efforts of leading industrialized countries to reduce barriers on international transactions have been biased to trade in goods and capital and against labor migration. This paper examines the rationality of such an asymmetry in the liberalization policies by making a welfare comparison between countries under four different international economic regimes, (i)free trade in goods only, (ii)free trade in goods and labor force, (iii)free trade in goods and capital and (iv)free trade in goods and the factors of production in a general equilibrium model with the intra-industry trade which stems from monopolistic competition and increasing-returns-to-scale technologies using capital as a fixed input and labor as a variable input.

Endogenous Trade Policies,WTO Rules and International Capital Movement

This paper views the modern world economy to be constructed with democratic countries that implement trade policies as an income distribution policy, World Trade Organization that intends to improve world welfare by prohibiting export subsidies but allowing import and export tariffs, and international capital movement. Based on this view, it explores the effects of these WTO rules on the volume of international trade in goods, the direction and volume of international capital movement and world welfare in a two-country, two-good, two-factor model with capital specific to the production of one good and internationally different production technologies. It shows that if the export subsidies and import tariffs prevail as the Nash equilibrium trade-policy measures in the era before the WTO is established, the enforcement of those WTO rules reduces the volume of trade in goods, expands international capital movement the direction of which is the same as international trade in the capital-intensive good but shrinks international capital movement the direction of which is opposite to it, and the expansion in international capital movement cannot necessarily compensate the loss of world welfare caused by the reduction in international trade in goods and the failure in achieving the Pareto optimum in the domestic political equilibrium as a result of the prohibition of export subsidies.specific factor, different technologies, export subsidies, Nash equilibrium

THE ROLE OF FACTOR INTENSITIES, INTER-FACTOR COOPERATION, AND PRODUCTIVITY IN A GENERAL EQUILIBRIUM MODEL

The purpose of this paper is to explore thoroughly the effects of the change in factor supplies on outputs with commodity prices held constant and to disentangle the intricate involvement between the roles of the factor intensities and factor substitution played in determining such Rybczynski effects in the three-factor, two-good general equilibrium model. It turns out clearly that in place of the factor substitution relations in the cost function, the introduction of cooperative relations between different factors in the production function is helpful for this purpose.