煤矸石倾倒过程中的运动特征对矸石山非均质性的影响研究

本文研究煤矸石倾倒过程中的运动特征对矸石山非均质性特征的影响。分析表明,当煤矸石密度相同时,煤矸石在坡面上的运动位移与矸石山高度、初始速度、粒径、球度和磨圆度成正比,这就使煤矸石随矸石山高度的变化粒径分布不均匀,进而造成了矸石山的非均质性。     

古诺纳什均衡下商品出口与绕过反倾销的FDI比较研究

该文章运用微观经济学、博弈论等理论和方法探讨了在国内外企业处于完全信息且同时决策（即古诺纳什博弈）的假设条件下，面对进口国政府的反倾销国外企业对商品出口或对外直接投资决策如何抉择问题；建立了绕过反倾销的可能引起对外直接投资的最小反倾销税率模型；得出了该反倾销税率与国外企业在国内外生产产品的单位边际成本及进口国市场所用收入税率有关以及进口国政府不能确定过高的反倾销税率等结论，并以彩电行业进行案例分析。     

煤矿自燃煤矸石山的治理措施探讨

露天堆放的煤矸石山极易自燃,释放出大量的有毒有害气体,严重污染了大气、土壤及水环境,并会导致严重的环境问题和社会问题。文章以某煤矿煤矸石山为例,主要从工程措施、边坡工程、自燃处理、浇灌系统和生态恢复等方面进行了矸石山治理措施的综合探讨。     

Estimating the Accounting Price of Foreign Exchange: An Input–Output Approach

When adjustments in the foreign exchange market involve changes in the production of marginally traded goods, the traditional formula for calculating the accounting (shadow) price of foreign exchange assumes that domestic prices and marginal costs at efficiency prices for those goods are equal. In this paper, a method is proposed for estimating an accounting price ratio of foreign exchange in a partial equilibrium framework, abandoning that assumption. For that purpose, input–output techniques are used, to take into account the effets of changes in the production of traded goods.     

Are government or private enterprises more likely to engage in dumping? Some international evidence

This paper provides the first systematic evidence comparing the incidence of below-cost dumping among state and privately owned firms. Recent economic theory indicates that government enterprises, if motivated by goals such as output or revenue maximization rather than profit maximization, face higher returns to engaging in below-cost pricing than private enterprises. International data from anti-dumping investigations strongly confirm this prediction. Between 43% and 94% of initiated below-cost dumping cases and between 54% and 100% of affirmative dumping decisions against exporting firms from nonmarket economies are attributable to those firms' publicly owned status. We are able to reject the hypotheses that this result is explained by political biases against nonmarket economies in anti-dumping procedures or from possible political biases stemming from the industry composition of nonmarket exports. In fact in both cases, we find that the above results may understate the true effect of market organization on a country's propensity to engage in dumping.     

社会倾销对我国对外贸易的影响及策略

经济全球化在促进生产力增长的同时,产生了负面的影响。尤其是发达国家以反"社会倾销"为理由,提出将贸易与劳工标准挂钩,实施贸易制裁。这必将对中国的对外贸易发起挑战。我们应从中国的实情出发,找出我国劳工标准现状与国际标准的差距。在国际国内层面采取加强与国际组织的互动;加强职业安全管理及逆向采购等措施。     

Liberalization,entry and product quality in transition economies

We model the effect of liberalization on product quality and industrial activity in transition economies. As barriers to entry are reduced, entry costs fall. This leads to an increase in the proportion of low quality producers in the market. The decrease in the expected quality can have adverse effects on consumer demand for the domestic product. The analysis suggests a demand side explanation of the observed restructuring and decline in output in sectors exposed to Western competition during transition.     

The factors determining the profitability of international airlines: Some econometric results

The deregulation of the US domestic airline market in 1978 and its apparent relative success continues to attract a great deal of interest among US and other economists. This uniquely US experience has clearly shown that factors such as market contestability, the multiple output nature of costs, the structure of networks and airport presence play a crucial role in the survival and, ultimately, profitability of relatively free and unregulated airlines. However, most international airlines still operate in a heavily regulated environment. While the tendency is clearly toward liberalization, the question remains: What can these airlines do to improve their profitability within this framework? Our results indicate that profitable airlines have high passenger load factors, a relatively low proportion of capacity related costs, younger and more efficient fleets and supplement their passenger loads with freight.     

完全信息博弈下三国反倾销税率优化定价模型

文章首先分析了我国政府在计算反倾销税率所依据的倾销幅度公式存在的缺陷,然后运用经济学、博弈论等相关知识推导出在结合完全信息动态和静态博弈下三个国家的反倾销税率优化模型,接着对模型结果进行了影响因素分析,最后对我国政府提供了一些政策建议。     

Productivity Changes and Changes in the Requirements of Imports in the Swedish Economy, 1957–1980: an Input–Output Study

The present paper reports on a study where Swedish input–output data are exploited for the first time to analyse changes over time in the requirements of labour, capital and imports per unit offinal output. Individual commodity groups and the whole of the economy are objects of analysis within the framework of the Leontief open static model. Total labour coeflcients declined for all but one of 26 commodity groups. Changes in the intermediate structure are in general of less importance than changes in direct labour coefficients. The hypothesis that imports were substituted for labour or labour-intensive domestic intermediates finds support in the data analysed. The increasing capital/labour ratios observed harmonize with the increasing costs of labour also registered for the period of study.     

Labor's liquidity service and firing costs

This paper studies the specific effect that firing costs can have on firms facing liquidity constraints. When firing costs are zero and a time gap exists between production and its associated revenues, firing allows firms to hold on to their liquid assets by saving on wages, and thus, allows firms to cope better with liquidity shocks when external financing is too costly or unavailable. I refer to this feature as labor's liquidity service. Higher firing costs reduces the value of labor's liquidity service, and thus, increases firms' incentive for hoarding liquidity and reduces firms' demand for production inputs. In addition to this negative effect at the creation margin of production, firing costs have a relatively higher positive effect on the destruction margin of production of financially restricted firms. This paper presents a model that develops these ideas and shows that the presence of firing costs has a stronger negative effect on the output of firms facing liquidity constraints. Regression analysis, based on country-industry panel data sets, provides empirical evidence consistent with the liquidity service effect of firing costs. I find a relatively stronger negative effect of firing costs on the output of industries with higher liquidity requirements and a relatively stronger negative effect of firing costs on the output of small, and more likely financially constrained, firms.     

Labour Demand Adjustment: Does Foreign Ownership Matter?

This paper examines whether multinationals differ in their employment adjustment from domestic companies, using a panel of 5,544 Belgian firms observed between 1998 and 2005. More precisely, we estimate labour adjustment costs by worker and firm types. We propose a new flexible specification that takes into account the role of firm size in adjustment costs. Our results indicate that adjusting white‐collar employment is around half as costly for multinational firms (MNFs) as for domestic firms of the same size. The remaining differential in adjustment costs between MNFs and domestic firms might result, among other things, from multinationals' stronger bargaining power.     

A cost evaluation method for dynamic line balancing

A procedure is presented for calculating stochastic costs, which include operator (labor) and inventory costs, associated with dynamic line balancing. Dynamic line balancing, unlike the traditional methods of assembly and production line balancing, assigns operators to one or more operations, where each operation has a predetermined processing time and is defined as a group of identical parallel stations. Operator costs and inventory costs are stochastic because they are functions of the assignment process employed in balancing the line, which may vary throughout the balancing period, and the required flow rate. Earlier studies focused on the calculation of the required number of stations and demonstrated why the initial and final inventories at the different operations are balanced.The cost minimization method developed in the article can be used to evaluate and compare the assignment of operators to stations for various assignment heuristics. Operator costs and inventory costs are the components of the cost function. The operator costs are based on the operations to which operators are assigned and are calculated for the entire work week regardless of whether an operator is given only a partial assignment which results in idle time. It is assumed that there is no variation in station speeds, no learning curve effect for operators' performance times, and no limit on the number of operators available for assignment. The costs associated with work-in-process inventories are computed on a “value added” basis. There is no charge for finished goods inventory after the last operation or raw material before the first operation.The conditions which must be examined before using the cost evaluation method are yield, input requirements, operator requirements, scheduling requirements and output requirements. Yield reflects the output of good units at any operation. The input requirement accounts for units discarded or in need of reworking. The operator requirements define the calculation of operator-hours per hour, set the minimum number of operators at an operation, and require that the work is completed. The scheduling requirements ensure that operators are either working or idle at all times, and that no operator is assigned to more than one operation at any time. The calculation of the output reflects the yield, station speed, and work assignments at the last operation on the line.An application of the cost evaluation method is discussed in the final section of the article. Using a simple heuristic to assign operators, the conditions for yield, inputs, operators, scheduling, and output are satisfied. The costs are then calculated for operators and inventories.In conclusion, the cost evaluation method for dynamic balancing enables a manager to compare the costs of assigning operators to work stations. Using this method to calculate the operator and inventory costs, a number of different heuristics for assigning operators in dynamic balancing can be evaluated and compared for various configurations of the production line. The least cost solution procedure then can be applied to a real manufacturing situation with similar characteristics.     

Planning Feature The Forecast in Detail: [4] Focus: Unit Labour Costs in Manufacturing Industry and the Outlook for Price Inflation

The latest figures show that unit labour costs in manufacturing rose 8.9 per cent in the year to March, the highest rate of increase since 1981 (when costs were decelerating) and a sharp contrast with 1983 when, for a brief period, COSD were stable. In this Focus we examine how this development has occurred and consider its implications. We conclude that the recent figures represent a temporary deterioration in the costs of manufacturing industry and that, once output picks up again and as long as wages respond to the current low rate of inflation, there should be no severe adverse consequences on either inflation or output. If, however, costs are not controlled then the outlook for either inflation or output and unemployment is worse than our central forecast suggests.     

Unit cost studies in French Universities

This paper sets out: (1) to outline the methodology for and (2) to compare the results of research into unit costs at a number of French Universities.Techniques of output budgeting are used by teams in seven universities. The methodology is original in a number of respects and the article shows how teaching staff costs non-teaching staff costs and building and equipment costs are presented, so as to give the cost of each Licence granted in a number of disciplines.It seems that in non-scientific courses, French costs per graduate are a good deal lower than in most other countries and much may be learned from French Universities where resource use efficiency is concerned.     

Is the Economy Overheating?

In the last year total output has risen 4 per cent and manufacturing is up 6 per cent. Unemployment has fallen by 400,000. The current account, which was in surplus in the first half of the year, has moved back into deficit. Does this mean that the economy is “over- heating”? In the context of our forecast we examine this issue; we consider how rapidly supply can increase and how fast demand is increasing. We conclude that the growth of output in the last year was initially driven by supply and that, more recently, domestic demand has been growing very rapidly. The emergence of a current account deficit is evidence of excess domestic demand but from now on we expect demand to grow less rapidly. With non-oil supply expanding at a rate in excess of 3 per cent, we forecast steady output growth and little change in either inflation or the current account. In our judgement, the economy, though hot, is not overheating.     

Market reforms in the time of imbalance

We study the consequences of product and labor market reforms in a two-country model with endogenous producer entry and labor market frictions. We focus on the role of business cycle conditions and external constraints at the time of reform implementation (or of a credible commitment to it) in shaping the dynamic effects of such policies. Product market reform is modeled as a reduction in entry costs and takes place in a non-traded sector that produces services used as input in manufacturing production. Labor market reform is modeled as a reduction in firing costs and/or unemployment benefits. We find that business cycle conditions at the time of deregulation significantly affect adjustment. A reduction of firing costs entails larger and more persistent adverse short-run effects on employment and output when implemented in a recession. By contrast, a reduction in unemployment benefits boosts employment and output by more in a recession compared to normal times. The impact of product market reforms is less sensitive to business cycle conditions. Credible announcements about future reforms induce sizable short-run dynamics, regardless of whether the announcement takes place in normal times or during an economic downturn. Whether the immediate effect is expansionary or contractionary varies across reforms. Finally, lack of access to international lending in the wake of reform can amplify the costs of adjustment.     

地下水对新邓耳排土场稳定性影响分析

地下水对于边坡稳定的影响很大。由于新邓耳排土场面积大、水文地质复杂,因此地下水的处理对排土场的安全性至关重要。笔者通过简化毕肖普法和传递系数法等,对排土场进行边坡稳定系数的计算,并运用STAB[1]软件重点计算、评价排土场的稳定程度。     

Input–Output Based Measures of Underlying Domestic Inflation: Empirical Evidence from Denmark 1903–2002

The paper presents input–output based time-series data for the underlying domestic inflation in Denmark 1903–2002 and analyses the inflationary development during the last century. More conceptual issues in relation to the interpretation and use of input–output based domestic inflation measures are also discussed. The purpose of such inflation measures is to track the development in the domestic market-determined inflation, which is closely related to the price of gross value added in the domestic market-based private business sector. A price index for value added often displays a different short-term development than the headline CPI. Such differences can be useful in an assessment of the current inflationary environment and in relation to an interpretation of the historical inflation development.     

Introducing the supply side into the LBS Model

This Briefing Paper describes a new version of the London Business School model, which incorporates our most recent research on the supply side. The changes reflect the desire to improve the specification of the supply-side of the model, and to capture the effects of taxes on the incentives to save, invest and to work, while still retaining the basic features of the income-expenditure framework. The main features of the new model are: - Gross domestic product is determined as the sum of the outputs of five sectors. Previously GDP was determined by the demand side as the sum of the expenditure components. - Domestic demand for the output of the private sector depends on domestic absorption and on the price of this output relative to import prices. Overseas demand for exports depends on world economic activity and on the price of exports relative to the world price of exports. - Supply depends on the capital stock, real unit labour costs and real raw material prices. In the short run, input prices are allowed to affect the mix between goods which are exported and those which are supplied to the domestic market. In the long run, however, the mix depends only on the price of exports relative to the price of domestically supplied goods (i.e., relative profitability). - In the short run, disequilibrium in the goods market is reflected in adjustments to prices, inventories and the external balance. - Since gross domestic product is determined by summing the output of each sector, output decisions are reconciled with expenditure decisions by making imports the difference between final expenditure and aggregate supply. - In the long run, increases in government expenditure crowd out private expenditure, but the effect takes several years to come through. - A cut in corporation taxes which is not financed by higher taxes elsewhere boosts the supply side by raising investment and the capital stock, but not by enough to raise revenues sufficiently to pay for the tax cut. Private sector saving increases but not by enough to fund higher public sector borrowing, so the current account goes into deficit. - In the short run, both supply and demand factors influence economic activity; in the long run, the path of the economy depends only on population growth, capital accumulation and technical progress.