Oligopsonistic Cats and Dogs

This paper examines strategic investment behaviour when firms have oligopsony power in the input market. Focusing on the labour market, we study how a firm’s labour supply augmenting investment affects the equilibrium when oligopsonistic firms set wages. Relative to a non-strategic benchmark, optimal investment strategies involve boosting investment that leads rival employers to cut wages, but involves cutting back on investment that causes the latter to increase their wages. Implications of existing labour market policies for strategic investment are also discussed. Finally, the model is generalised to nest wage and employment competition and is extended to include other types of investment.     

Supply function equilibria with capacity constraints and pivotal suppliers

The concept of a supply function equilibrium (SFE) has been widely used to model generators' bidding behavior and market power issues in wholesale electricity markets. Observers of electricity markets have noted how generation capacity constraints may contribute to market power of generation firms. If a generation firm's rivals are capacity constrained then the firm may be pivotal; that is, the firm could substantially raise the market price by unilaterally withholding output. However the SFE literature has not fully considered the impact of capacity constraints and pivotal firms on equilibrium predictions. We characterize the set of symmetric supply function equilibria for uniform-price auctions when firms are capacity constrained and show that this set is increasing as capacity per firm rises. We provide conditions under which asymmetric equilibria exist and characterize these equilibria. In addition, we compare results for uniform-price auctions to those for discriminatory auctions, and we compare our SFE predictions to equilibrium predictions of models in which bidders are constrained to bid on discrete units of output.     

K?nnen sich erneuerbare Energien langfristig auf wettbewerblich organisierten Stromm?rkten finanzieren?

In this paper we address the issue of whether renewable energy sources can be integrated into power markets if the use of renewable energies is extended at the desired speed. Market integration means that renewable energy sources have to cover their full costs from revenues on competitive markets. In the first part of this paper, we evaluate the long-term revenues of intermittent renewable energy sources using a high resolution power market model. Considering the renewable targets of the German lead study of 2010, we show that due to the merit order effect, intermittent renewable energy sources, such as wind power and photovoltaic, cannot be financed through power markets alone, even if their full costs fall below those of conventional power plants. This is also true for scenarios with high CO₂-prices and increasing spot market prices. In the second part of this paper, we discuss whether in the long run additional instruments such as green certificates or capacity markets would allow for a more competitive financing of renewable energy sources. Center stage in the discussion is the question under which circumstances these instruments increase competitive pricing and decentralised market decisions.     

电煤市场中买方市场集中度对均衡价格的影响分析

几乎所有的文献都从"市场煤"与"计划电"的体制矛盾入手分析电煤价格持续上涨及发电企业经营困难的主要原因与相关对策。作者认为,在近年来电煤市场供求总量基本平衡的前提下,电煤市场价格持续大幅度上涨与发电企业买方市场集中度有关。本文运用讨价还价模型,分析了买方市场集中度变化即改单一发电企业购煤为发电集团公司统一购煤甚至多家发电集团公司统一购煤对电煤均衡价格的影响。结果表明:提高买方市场集中度能有效降低电煤市场均衡价格。     

COSTLY BUYER SEARCH IN LABORATORY MARKETS WITH SELLER ADVERTISING*

In this experiment, sellers simultaneously choose prices and advertising strategies. Buyers either purchase at an advertised price or search sequentially for other prices. In the unique symmetric equilibrium, sellers charge a high unadvertised price or advertise a price chosen from a lower interval. Increases in search or advertising costs raise equilibrium prices and affect equilibrium advertising intensity. Empirical results are consistent with most comparative static predictions. Sellers, however, price much lower and advertise more intensely than predicted. Consequently, market outcomes more closely resemble a perfect information, Bertrand‐like equilibrium than the imperfect information, mixed strategy equilibrium with significant seller market power.     

Buyer power and exclusion in vertically related markets

Suppliers and consumer organizations have become increasingly concerned by the build-up of buyer power of retailers in many markets. A major concern is that strong retailers will abuse their power to exclude products and rival retailers from the market to be able to increase prices to consumers. As a consequence, remedies to limit buyer power are discussed and implemented in many countries. In this paper we compare the incentives for exclusion, and the effect on consumers prices, under both buyer and seller power. We study a model with a dominant upstream manufacturer and a competitive fringe of producers offering their products to two differentiated downstream retailers. We compare the equilibrium outcome of this model when i) the dominant supplier holds all the bargaining power, and (ii) the retailers have all the bargaining power. We show that full or partial exclusion of either the competitive product or downstream retailers occurs when inter and intrabrand competition are strong. This is true both under seller and buyer power. However, in contrast to the received literature, we find that buyer power weakly enhances welfare compared to seller power because buyer power will lead to both more product variety (less exclusion) and lower retail prices.     

The reverse Cellophane fallacy in market delineation

In the landmark Cellophane case, the Supreme Court erroneously concluded that du Pont did not have significant market power because the Court evaluated the elasticity of demand for Cellophane at the monopoly equilibrium, at which the elasticity was far higher than at the competitive equilibrium. The Court's error is commonly referred to as the Cellophane fallacy. This paper contends that there also is a reverse Cellophane fallacy. Markets delineated on the basis of prevailing demand elasticities are likely to be too small and the potential for the exercise of market power is likely to be overstated.     

VERTICAL INTEGRATION AND SHARED FACILITIES IN UNREGULATED INDUSTRIES

In this paper we analyze the equilibrium market structure, following liberalization, of an industry involving an essential facility. Two alternative modes of market entry are considered, in conjunction with vertical integration, namely: (i) full entry, which means building a new and more efficient facility at a positive fixed cost; and (ii) partial entry, which means purchasing existing capacity from the incumbent, at a fixed price per unit that is freely negotiated between the incumbent and the entrant. We show that vertical integration is a dominant strategy for each firm under either entry mode, and that upstream firms choose to share the incumbent's facility when the entrant's fixed cost exceeds a positive threshold. In addition, welfare analysis shows that in many situations the market can efficiently solve the trade-off between fixed-cost savings and softened downstream competition, thus providing a rationale for the liberalization of such industries. Several competition policy implications are discussed.     

Labour Market Governance and the Creation of Outsiders

Using case‐study data, the article examines the contention that protective labour market policies and trade union action are responsible for growing divisions between labour market ‘insiders and outsiders’. Case studies are reported on developments in collective bargaining in the hospitals and engineering sectors from seven western and central European countries. The article finds that managerial strategies, and interactions between management and unions, have to be considered to give a full account of the growth of precarious employment.     

Food scare crises and developing countries: The impact of avian influenza on vertical price transmission in the Egyptian poultry sector

A bivariate smooth transition vector error correction model is applied to monthly poultry price data to analyze the effects that avian influenza has had on price transmission along the Egyptian poultry marketing chain. In order to reflect consumer awareness of the crisis, an avian influenza food scare information index is developed and used within the model as a transition variable. Our results suggest that price adjustments to deviations from the market equilibrium parity depend on the magnitude of the avian influenza crisis. Further these adjustments are found to have very different implications for market equilibrium: during the crisis retailers use their market power to increase marketing margins. In contrast, wholesaler margins are found to decline. Results also suggest that food safety information indices contribute to understanding the economic effects of food scare crises in developing countries.     

电力市场效率评估与碳市场价格设计——基于电碳市场关联视角下的传导率估计

厘清并量化电力市场与碳市场间的关联关系,是深化电力市场改革与实现"双碳"目标的重要抓手。本文基于2006—2018年中国100个地级及以上城市的面板数据,使用似不相关回归模型评估了电力市场效率,在此基础上研究了电、碳市场关联条件下碳价对电价的传导率,并对不同场景下全国碳市场的碳价进行了优化设计。研究发现:(1)与非试点地区相比,碳市场试点地区中电力市场的无谓损失率更低,并且市场效率的提高具有更高的碳减排作用。(2)电、碳市场关联条件下,碳价对电力市场中居民电价的传导率高于对工业电价的传导率,但均远低于完全竞争条件下的传导率水平。(3)传导率的提升能够缓解"降电价"与"碳减排"之间的矛盾。当前传导率下电力市场效率目标与碳减排目标的协同实现需要碳价的大幅提升,而在完全传导的理想情况下最优碳价约为40元/吨。(4)长期而言,当前传导率下碳排放总量下降场景、经济增速放缓场景对应的最优碳价分别为255.05元/吨、173.63元/吨,而人口老龄化场景并未对最优碳价的设置形成约束。本文的研究不仅为电力市场与碳市场之间的关联奠定了理论基础,也为全国碳市场价格机制的优化设计提供了政策参考。     

The Share Economy with Efficiency Wages

This paper examines the cyclical implications of share contracts in an efficiency wage model, with wage and share economy firms facing a common labor market constraint. In the efficiency wage context, I find that the share economy will no longer remain at full employment in the face of modest-sized demand shocks. But suitably amended, Weitzman's (1983, 1984, 1985, 1986) conclusions regarding the cyclical employment benefits of share arrangements extend to an efficiency wage model.     

Mergers,coordinated effects and efficiency in the Portuguese non-life insurance industry

We evaluate the impact on market power and efficiency of a series of mergers on three Portuguese non-life insurance markets. We specify and estimate, with a panel of firm-level data, a structural model which includes: preferences, technology, and a market equilibrium condition. Firms' demand curves are not very elastic. Firms' technologies exhibit scale and scope economies and high cost efficiency scores. We find that, for the period following the mergers, there is no evidence of: (i) an increase in market power through coordinated behavior, or (ii) changes in cost efficiency levels. In addition, social welfare increased.     

Localized Competition,Heterogeneous Firms and Vertical Relations

This paper investigates the link between firms' geographic configuration and market power in imperfect markets. We consider two related setups. The first illustrates the relevant characteristics of the pricing equilibrium. A main implication is that the equilibrium price vector changes in accordance with the firms' spatial configuration. The second, where firms operate as downstream retailers affiliated to rival upstream wholesalers, shows that upstream market power is strongly affected by an index of geographic concentration which reflects the spatial configuration of retailers. Finally, our analysis provides several insights for market delineation as well as merger evaluation and remedies.     

促进就业:德国劳动力市场改革

自2003年始,德国推行了一系列劳动力市场改革措施。改革的取向,是放松劳动力市场管制从而增强就业灵活性。为此,德国政治家和经济学人做了大量社会动员工作。在理论上,强调向有关社会市场经济制度的基本思想回返,将就业安全性与灵活性相结合。在政策设计中,对劳动和社会保障管理系统实行去官僚化改造,变革社会救助和失业保险条例,激励失业者从事灵活就业。同时,辅之以对人力资本的大规模公共投资,并以就业目标为导向,在职业培训和中介领域引入竞争机制。在经济整体向好的形势下,德国改革取得了就业形式多样化和失业率下降的成果。这其中的理论和制度创新,值得中国决策者和公众借鉴。     

Long‐Run Patterns of Labour Market Polarization: Evidence from German Micro Data

The past four decades have witnessed dramatic changes in the structure of employment. In particular, the rapid increase in computational power has led to large‐scale reductions in employment in jobs that can be described as intensive in routine tasks. These jobs have been shown to be concentrated in middle‐skill occupations. A large literature on labour market polarization characterizes and measures these processes at an aggregate level. However, to date, there is little information regarding the individual worker adjustment processes related to routine‐biased technological change. Using an administrative panel dataset for Germany, we follow workers over an extended period of time and provide evidence of both the short‐term adjustment process and medium‐run effects of routine task‐intensive job loss at an individual level. We initially demonstrate a marked, and steady, shift in employment away from routine, middle‐skill, occupations. In subsequent analysis, we demonstrate how exposure to jobs with higher routine task content is associated with a reduced likelihood of being in employment in both the short term (after one year) and medium term (five years). This employment penalty to routineness of work has increased over the past four decades. More generally, we demonstrate that routine task work is associated with reduced job stability and more likelihood of experiencing periods of unemployment. However, these negative effects of routine work appear to be concentrated in increased employment to employment, and employment to unemployment transitions rather than longer periods of unemployment.     

The Impact of PV on the German Power Market

During the last months, the discussion on feed-in tariffs (FiT) for photovoltaic (PV) installations in Germany has gained new momentum. On the one hand, the issue of over-subsidisation due to the fact that module prices have been decreasing faster than feed-in tariffs was discussed. On the other hand, increasing costs to the consumers of power were put on the agenda after the unprecedented increase in new PV capacity in Germany in 2009. After the general election in September 2009 this discussion lead to different proposals for adjusting the FiT scheme. In summer 2010 a bill was passed amending the current FiT. Both, in the discussion and in the bill, an important aspect has been neglected so far: the impact of the massively increasing PV capacities on the economics of conventional power plants. The present study fills this gap. In the first part, it is qualitatively shown how the power price and the equilibrium quantity on the power exchange change with increasing PV capacities. These findings can be directly translated into shrinking revenues for operators of conventional power plants. In the second part, a quantitative analysis of the German power market is provided. The effects of different PV scenarios on the wholesale power price and the total revenues (i.e., price multiplied by quantity) of all conventional power plants are calculated. For an incumbent operator of a coal-fired power plant, the contribution margin may decrease by more than 25% and for a new, yet to build gas-fired combined cycle power plant it may drop by more than 30%. The study concludes that the PV support scheme can be understood as the accelerator pedal for the structural change in the German power sector. Implementing the changes in the feed-in tariffs as presented in the bill will require more and faster changes in the overall design of the power market to provide sufficient incentives for backup capacities when the sun is not shining. It would also be accompanied by additional acceleration costs. Absolute caps on the added capacity, rather than further cuts in the tariffs, could buy some time for a careful redesign of the market and may reduce resistance from incumbent operators.     

Import Competition, Employment Risk, and the Job-Search Outcomes of Trade-Displaced Manufacturing Workers

This study examines the underlying relationships that exist among import competition, employment risk, and worker earnings. In addition, we consider how such competitiveness and risk experienced on a prior job will affect, under both equilibrium and disequilibrium interpretations of the labor market, alternative postdisplacement job-search outcomes. Econometric models of predisplacement earnings and postdisplacement outcomes (jobless duration, reemployment, and earnings) provide insights on these relationships and in turn on the comparative job-search success of trade-displaced and "other" displaced workers.     

RELATIONSHIPS,COMPETITION AND THE STRUCTURE OF INVESTMENT BANKING MARKETS*

It is well known that competition can destroy incentives to invest in firm‐specific relationships. This paper examines how the tension between relationships and competition is resolved in the investment banking market, which for decades has been characterized by both relationships and competition. The model studies the impact on relationships of four different dimensions of competition: non‐exclusive relationships, competition from arm's‐length intermediaries, non‐price competition, and endogenous entry. The analysis shows how market equilibrium adjusts so that relationships are sustained in the face of such competition. Banks are shown to establish relationships without either local or aggregate monopoly power. The model rationalizes two distinct empirical regularities of market structure: the invariance of market concentration to market size; and a pyramidal market structure with an oligopoly comprising similar‐sized players at the top and a large number of small banks at the bottom. The analysis may also shed light on the industrial organization of other professional service industries.     

Labour Market Dualism and Diversification in Japan

The Japanese labour market has been regarded as ‘dualistic’ in terms of employment status (regular vs non‐regular). While it is true, this perspective misses recent changes in regular employment in terms of labour flexibility. The government has attempted labour market deregulation since the 1990s to increase the flexibility of not only non‐regular but also regular employment, and the labour market has become more diversified. Labour unions lack power resources to resist these neoliberal changes, however, because of their insufficient access to policy‐making, low union density and a lack of solidarity against the background of economic stagnation and competition under globalization.