An Empirical Market Microstructure Analysis of the Implied Spread Cost in the Japanese Day-Ahead Electricity Market
AbstractHistorical data of system prices over 48 half-hour intra-daily intervals in the Japan Electric Power Exchange (JEPX) are analyzed. Given theoretical and graphical preliminary analysis, we extract measures of the spread between the efficient price and actual transaction price for each month from November 2006 to April 2012. The measures are based on the first-order serial covariance of transaction returns proposed by Roll (1984) and on the historical highs and lows with some bias correction proposed by Corwin and Schultz (2012). Viewed as measures of the marginal costs of trading in the JEPX, the estimated spreads are on average at least 50 times as large as the one in the well-functioning S&P500 index futures market. The traded amount of electricity does not explain the variation of spreads once the time-of-a-day fixed effects and month-specific time effect are explicitly accounted for in the panel regression.
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Bibliographic InfoPaper provided by National Graduate Institute for Policy Studies in its series GRIPS Discussion Papers with number 12-22.
Length: 26 pages
Date of creation: Mar 2013
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This paper has been announced in the following NEP Reports:
- NEP-ALL-2013-03-23 (All new papers)
- NEP-ENE-2013-03-23 (Energy Economics)
- NEP-MST-2013-03-23 (Market Microstructure)
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