The Contestable Markets Theory - Efficient Advice for Economic Policy
Christian Growitsch, Thomas Wein
External Publications,
2004
Abstract
During the nineties of the last century several formerly monopolistic markets (telecommunication, electricity, gas, and railway) have been deregulated in Germany based on European directives and theoretically inspired by the theory of contestable markets. The original contestable market theory implied three assumptions necessary to be satisfied to establish potential competition: Free market entry, market exit possible without any costs, and the price adjustment lag exceeding the entry lag. Our analysis shows that if the incumbent reduces its prices slowly (high adjustment lag) and the market entry can be performed quickly (low entry lag), a new competitor will be able to earn back sunk costs. Therefore it is not necessary that all three conditions be complied with for potential competition to exist. Applying this „revised“ contestable market theory to the deregulated sectors in Germany, natural monopolies can be identified in telecommunication sections local loops and local/regional connection networks, in the national electricity grid and the regional/local electricity distribution networks, in the national and regional/local gas transmission/distribution sections, and in the railroad network. These sections are not contestable due to sunk costs, expected high entry lags and a probably short price adjustment lag. They are identified as bottlenecks, which should be regulated. The function of system operators in energy and railroad are closely related to the non-contestable monopolistic networks.
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Monetary Policy and Private Sector Development. The Case of South Africa
Tobias Knedlik
African Development Perspectives Yearbook, No. 9,
No. 9,
2004
Abstract
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The MCI as a Monetary Policy Guide in a Small, Open Emerging Market Economy
Philippe Burger, Tobias Knedlik
South African Journal of Economics,
No. 72,
2004
Abstract
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The influence of Vertical Integration and Property Rights on Network Access Charges in the German Electricity Markets
Christian Growitsch, Thomas Wein
External Publications,
No. 6,
2004
Abstract
German Electricity markets were deregulated in the late nineties of the last century. In contrast to other European countries, the German government enacted negotiated third party access instead of installing a regulation authority. Network access charges for new competitors are based on contractual arrangements between energy producers and industrial consumers, which specify the calculation schemes for access charges. Local and regional suppliers are nevertheless able to set (monopolistic) charges at their own discretion, restricted only by the possibility of interference competition authorities. While some of those suppliers have been acquired by one of the four Transmission System Operators and become vertically integrated, the majority is still independent public utility companies. In this paper we analyse if there is evidence for different charging behaviour depending on the supplier’s economic independence or its level of vertical integration. Controlling for other coefficients as the so called structural features and related cost differences as well as the influence of competition law suits, multivariate estimations show significantly lower access charges than vertically separated suppliers, whereas incorporated network operators charge significantly higher charges compared to independent suppliers for at least one typical case.
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IWH Economic Outlook 2004: No longer waiting for the economic upturn
Wirtschaft im Wandel,
No. 1,
2004
Abstract
The Economic Outlook 2004 updates the IWH forecast for 2004 and gives a first outlook on 2005. The world recovery is mainly driven by the strong economic impulses from the USA. Whereas the upturn in the US is domestically driven, the impetus in the euro area is coming from external trade. Nonetheless in Germany corporate investment activity still is slow. Although the tax reductions in 2004 will support private consumption, its overall economic impulse will be weak. German GDP in 2004 will increase 1.6% and 1.8% in 2005. At the labour market no clear improvement can be expected till the second half of 2004; on a yearly average employment will decrease by 100 000 persons in 2004. Albeit the partly broad forward third instalment of the tax reform, fiscal policy will have a restrictive aim. Monetary policy on the other hand will continue to be highly expansive, but as the output gap shrinks the ECB can be expected to increase interest rates moderately.
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Why do we have an interbank money market?
Jürgen Wiemers, Ulrike Neyer
IWH Discussion Papers,
No. 182,
2003
Abstract
The interbank money market plays a key role in the execution of monetary policy. Hence, it is important to know the functioning of this market and the determinants of the interbank money market rate. In this paper, we develop an interbank money market model with a heterogeneous banking sector. We show that besides for balancing daily liquidity fluctuations banks participate in the interbank market because they have different marginal costs of obtaining funds from the central bank. In the euro area, which we refer to, these cost differences occur because banks have different marginal cost of collateral which they need to hold to obtain funds from the central bank. Banks with relatively low marginal costs act as intermediaries between the central bank and banks with relatively high marginal costs. The necessary positive spread between the interbank market rate and the central bank rate is determined by transaction costs and credit risk in the interbank market, total liquidity needs of the banking sector, costs of obtaining funds from the central bank, and the distribution of the latter across banks.
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Does Transparency of Central Banks Produce Multiple Equilibria on Currency Markets?
Axel Lindner
IWH Discussion Papers,
No. 178,
2003
Abstract
A recent strand of literature (see Morris and Shin 2001) shows that multiple equilibria in models of markets for pegged currencies vanish if there is slightly diverse information between traders. It is known that this approach works only if there is not too precise common knowledge in the market. This has led to the conclusion that central banks should try to avoid making their information common knowledge. We present a model in which more transparency of the central bank means better private information, because each trader utilizes public information according to her own private information. Thus, transparency makes multiple equilibria less likely.
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Germany 2004: Only a transitory economic stimulus from moving tax cuts forward
Wirtschaft im Wandel,
No. 9,
2003
Abstract
In summer 2003 the German economy once again did not overcome the stagnation, which by now lasted three years. Only by the end of this year the German economy will begin to receive stronger support from a then further improved world economy. In the past months both US and European monetary policy have provided sufficient liquidity by lowering interest rates. In the USA, additional support is provided by fiscal policy; tax reductions and rebates increase domestic demand. Overall, Gross Domestic Product in the US will increase by 2.1% this year; in the euro area GDP will merely expand by a modest 0.8%. For Germany one of its key sectors will not be able to lift the economy as usual and GDP, when compared to last year, will only stagnate. Provided by the brought forward tax reform 2000 the coming year will begin with a stimulus to the German economy. The tax reductions, though, will have limited effect on aggregate production, as the increased consumption will not be able to stimulate investment. Accounting for calendar effects GDP in Germany will increase by at least 1% in 2004 compared with this year, but due to several additional working days in 2004, the unadjusted rate of expansion will be 1.7%. No substantial improvements are expected for the job market.
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Monetary Policy Shocks and Heterogeneous Finance Decisions: A Model of Hidden Effort Choice and Financial Intermediation
Diemo Dietrich
German Economic Review,
2003
Abstract
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The MCI as a monetary policy guide in a small, open and emerging market economy
Tobias Knedlik, Philippe Burger
Economic Working Paper Series,
2003
Abstract
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