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A New Approach to Investigate Market Integration: a Markov-Switching Autoregressive Model with Time-Varying Transition Probabilities

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  • Zhao, Jieyuan
  • Goodwin, Barry K.
  • Pelletier, Denis

Abstract

In this study, we develop a new approach to investigate spatial market integration. In particular, it is a Markov-Switching autoregressive (MSAR) model with time-varying state transition probabilities. Studying market integration is an effective way to test whether the law of one price holds across geographically separated markets, in other words, to test whether these markets perform efficiently or not. In this model, we assume that the parameters depend on a state variable which describes two unobservable states of markets – non-arbitrage and arbitrage – and is governed by a time-varying transition probability matrix. The main advantage of this model is that it allows transition probabilities to be time-varying. The probability of being in one state at time t depends on the previous state and the previous levels of market prices. An EM (Expectation-Maximization) algorithm is applied in the estimation of this model. For the empirical application, we examine market integration among four regional corn (Statesville, Candor, Cofield, Roaring River) and three regional soybean markets (Fayetteville, Cofield, and Creswell) in North Carolina. The prices of these markets are quoted daily from 3/1/2005 to 6/30/2010. Six pairwise spatial price relationships for the corn markets, and three pairwise spatial price relationships for the soybean markets are examined. Our results demonstrate that significant regime switching relationships characterize these markets. This has important implications for more conventional models of spatial price relationships and market integration. Our results are consistent with efficient arbitrage subject to transactions costs.

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Bibliographic Info

Paper provided by Agricultural and Applied Economics Association in its series 2012 Annual Meeting, August 12-14, 2012, Seattle, Washington with number 124825.

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Date of creation: 2012
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Handle: RePEc:ags:aaea12:124825

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Keywords: Research Methods/ Statistical Methods;

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  1. Spiller, Pablo T & Huang, Cliff J, 1986. "On the Extent of the Market: Wholesale Gasoline in the Northeastern United States," Journal of Industrial Economics, Wiley Blackwell, vol. 35(2), pages 131-45, December.
  2. Hamilton, James D, 1989. "A New Approach to the Economic Analysis of Nonstationary Time Series and the Business Cycle," Econometrica, Econometric Society, vol. 57(2), pages 357-84, March.
  3. Barry K. Goodwin & Nicholas E. Piggott, 2001. "Spatial Market Integration in the Presence of Threshold Effects," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 83(2), pages 302-317.
  4. Kling, Catherine L. & Sexton, Richard & Carman, Hoy, 1991. "Market Integration, Efficiency of Arbitrage, and Imperfect Competition: Methodology and Application to U.S. Celery," Staff General Research Papers 1609, Iowa State University, Department of Economics.
  5. Bob Baulch, 1997. "Transfer Costs, Spatial Arbitrage, and Testing for Food Market Integration," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 79(2), pages 477-487.
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