The Nature and Costs of Dis-Equilibrium Trade: The Case of Transatlantic Grain Exports in the 19th Century

Mette Ejrnæs and Karl Gunnar Persson
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Karl Gunnar Persson: Institute of Economics, University of Copenhagen

No 05-02, Discussion Papers from University of Copenhagen. Department of Economics

Abstract: The essential issue addressed in this paper is whether inefficient spatial arbitrage has significant welfare effects. The paper looks at the gains from improved market efficiency in transatlantic grain trade in the period 1855-1895. It shows that there is a law of one price equilibrium but that markets display spells of demand- or supply- constrained trade. Over time adjustments back to equilibrium as measured by the half-life of a shock become faster, and adjustment parameters are much larger than routinely reported in the PPP-literature. There are also significant gains from improved market efficiency but most of that improvement takes place in one step after the information ‘regime’ shifts from pre-telegraphic communication to a regime with swift transmission of information in an era with a sophisticated commercial press and telegraphic communication. Improved market efficiency probably stimulated trade more than falling transport costs.

Keywords: market integration; error correction; law of one price (search for similar items in EconPapers)
JEL-codes: C5 F1 N7 (search for similar items in EconPapers)
Pages: 22 pages
Date: 2005-02
New Economics Papers: this item is included in nep-his
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