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Market Power and Welfare in Asymmetric Divisible Good Auctions

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  • Manzano, Carolina
  • Vives, Xavier

Abstract

We analyze a divisible good uniform-price auction that features two groups each with a Önite number of identical bidders. At equilibrium the relative market power (price impact) of a group increases with the precision of its private information and declines with its transaction costs. An increase in transaction costs and/or a decrease in the precision of a bidding groupís information induces a strategic response from the other group, which thereafter attenuates its response to both private information and prices. A "stronger" bidding group -which has more precise private information, faces lower transaction costs, and is more oligopsonistic- has more price impact and so will behave competitively only if it receives a higher per capita subsidy rate. When the strong group values the asset no less than the weak group, the expected deadweight loss increases with the quantity auctioned and also with the degree of payo§ asymmetries. Price impact and the deadweight loss may be negatively associated. The results are consistent with the available empirical evidence. KEYWORDS: demand/supply schedule competition, private information, liquidity auctions, Treasury auctions, electricity auctions, market integration. JEL: D44, D82, G14, E58

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  • Manzano, Carolina & Vives, Xavier, 2017. "Market Power and Welfare in Asymmetric Divisible Good Auctions," Working Papers 2072/292436, Universitat Rovira i Virgili, Department of Economics.
  • Handle: RePEc:urv:wpaper:2072/292436
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    Keywords

    Teoria de la informació (Economia); Mercat -- Anàlisi; Bancs centrals; Subhastes; 33 - Economia;

    JEL classification:

    • D44 - Microeconomics - - Market Structure, Pricing, and Design - - - Auctions
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • E58 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Central Banks and Their Policies
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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