WTO accession issues.

For many applicant countries, accession to the WTO has been, and still is, a frustratingly slow process. In this paper, we discuss the substantial, contentious issues that are slowing down progress in accession negotiations. We contrast these with the benefits of WTO accession not only to the applicant countries, but also to the multilateral trading system as a whole and, hence, to current members. Against this background, we suggest a strategy to accelerate accession without diluting the ground rules of the multilateral trading system.WTO-Regeln; Mitgliedschaft; Verhandlungen; Kosten-Nutzen-Analyse; Weltwirtschaftsordnung; Welt;WTO accession , transition economies , state trading , anti-dumping duties;

Russian exports by regional origin: disparities, diversity and decentralization in the transformation process

This paper analyses the contribution of 71 regional entities to the exports of the Russian Federation outside the Soviet Union in 1989. A distinction is made between export earnings in convertible and nonconvertible currency, as well as between four major commodity categories. The focus of the analysis is on the likely consequences of greater regional economic autonomy within Russia. It is found that only very few areas would clearly benefit from enhanced regional control over export earnings, mainly by obtaining a higher share of resource rents. Furthermore, in the present environment of distorted prices and balance of payments constraints, decentralization could lead to substantial windfall gains for established exporters at the expense of areas that happen to supply mainly the domestic market. The speedy introduction of a price structure reflecting genuine scarcities would therefore help not only to eliminate allocative inefficiency, but also to minimize interregional distributional conflicts.

Broadening WTO membership : key accession issues.

n.a.WTO-Regeln; Mitgliedschaft; Welt;

Trade among the Post-Soviet states: evolution and policy issues

This paper analyses the causes of the precipitous fall in trade among the twelve CIS countries since 1990; points out the implications for industrial restructuring; and discusses the policy options for regional reintegration. The main finding is that the decline in intra-C!S trade was initiated by the institutional void left by the collapse of the central planning system. However, the high volume of trade among the former Soviet republics reflected largely their isolation from the rest of the world economy, as well as other policy-induced distortions. Therefore, if market-oriented economic reforms in the CIS countries are successful, intra-CIS trade flows will remain substantially smaller than during the Soviet period.Commonwealth of Independent States,regional integration,intra-regional trade,industrial restructuring

The use of synchrony in parent-child interaction can be measured on a signal-level

In our approach, we aim at an objective measurement of synchrony in multimodal tutoring behavior. The use of signal correlation provides a well formalized method that yields gradual information about the degree of synchrony. For our analysis, we used and extended an algorithm proposed by Hershey & Movellan (2000) that correlates single-pixel values of a video signal with the loudness of the corresponding audio track over time. The results of all pixels are integrated over the video to achieve a scalar estimate of synchrony

Feature- and Structure-Preserving Network Reduction for Large-Scale Transmission Grids

Many countries are currently challenged with the extensive integration of renewable energy sources, which necessitates vast capacity expansion measures. These measures in turn require comprehensive power flow studies, which are often computationally highly demanding. In this work a reduction strategy for large-scale grid models is introduced which not only reduces the model complexity but also preserves the structure and designated grid features. The objective is to ensure that areas crucial to the behavior and the relation of all elements to their physical counterparts remain unchanged. This is accomplished through a specifically designed reduction method for suitable areas identified through topological, electrical and market-based approaches for which we provide an open-source implementation. We show that the proposed strategy adapts to various models and accomplishes a strong reduction of buses and branches while retaining a low dispatch and branch flow deviation. Furthermore, the accuracy of the reduction generalizes well to other scenarios.Comment: 13th IEEE PowerTech Conference 201

Interval scheduling and colorful independent sets

Numerous applications in scheduling, such as resource allocation or steel manufacturing, can be modeled using the NP-hard Independent Set problem (given an undirected graph and an integer k, find a set of at least k pairwise non-adjacent vertices). Here, one encounters special graph classes like 2-union graphs (edge-wise unions of two interval graphs) and strip graphs (edge-wise unions of an interval graph and a cluster graph), on which Independent Set remains NP-hard but admits constant-ratio approximations in polynomial time. We study the parameterized complexity of Independent Set on 2-union graphs and on subclasses like strip graphs. Our investigations significantly benefit from a new structural "compactness" parameter of interval graphs and novel problem formulations using vertex-colored interval graphs. Our main contributions are: 1. We show a complexity dichotomy: restricted to graph classes closed under induced subgraphs and disjoint unions, Independent Set is polynomial-time solvable if both input interval graphs are cluster graphs, and is NP-hard otherwise. 2. We chart the possibilities and limits of effective polynomial-time preprocessing (also known as kernelization). 3. We extend Halld\'orsson and Karlsson (2006)'s fixed-parameter algorithm for Independent Set on strip graphs parameterized by the structural parameter "maximum number of live jobs" to show that the problem (also known as Job Interval Selection) is fixed-parameter tractable with respect to the parameter k and generalize their algorithm from strip graphs to 2-union graphs. Preliminary experiments with random data indicate that Job Interval Selection with up to fifteen jobs and 5*10^5 intervals can be solved optimally in less than five minutes.Comment: This revision does not contain Theorem 7 of the first revision, whose proof contained an erro

Sunspot modeling: From simplified models to radiative MHD simulations

We review our current understanding of sunspots from the scales of their fine structure to their large scale (global) structure including the processes of their formation and decay. Recently, sunspot models have undergone a dramatic change. In the past, several aspects of sunspot structure have been addressed by static MHD models with parametrized energy transport. Models of sunspot fine structure have been relying heavily on strong assumptions about flow and field geometry (e.g., flux-tubes, "gaps", convective rolls), which were motivated in part by the observed filamentary structure of penumbrae or the necessity of explaining the substantial energy transport required to maintain the penumbral brightness. However, none of these models could self-consistently explain all aspects of penumbral structure (energy transport, filamentation, Evershed flow). In recent years, 3D radiative MHD simulations have been advanced dramatically to the point at which models of complete sunspots with sufficient resolution to capture sunspot fine structure are feasible. Here, overturning convection is the central element responsible for energy transport, filamentation leading to fine structure, and the driving of strong outflows. On the larger scale these models are also in the progress of addressing the subsurface structure of sunspots as well as sunspot formation. With this shift in modeling capabilities and the recent advances in high resolution observations, the future research will be guided by comparing observation and theory