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A Disaggregated Analysis of Product Price Integration in the Southern African Development Community

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  • Neil Balchin
  • Lawrence Edwards
  • Asha Sundaram

Abstract

Price-based empirical evidence on the extent to which product markets are integrated in developing regions is noticeably limited, particularly in Africa. This article uses highly disaggregated retail price data for twenty-four narrowly defined products collected at the district level in four Southern African Development Community (SADC) countries (Botswana, Malawi, South Africa and Zambia) to assess the extent to which product prices are integrated within and between these countries. We find evidence of large and persistent absolute deviations from the law of one price both within and between each of the four countries. Price dispersion is found to be higher between SADC countries than within the individual countries. On average, absolute price deviations between country pairs are smaller for countries adjacent to each other and for countries that share common membership in the Southern African Customs Union. Simple econometric estimates show that absolute price deviations between district pairs in the region increase the further apart the districts are from each other and are higher in the case of districts separated by a national border. Overall, we find no clear evidence that product markets in the SADC region have become more integrated between 2006 and 2009 (although product prices between the Common Market for Eastern and Southern Africa countries did become more integrated over this period), despite the liberalisation of tariffs under the SADC Protocol on Trade. Trade liberalisation alone appears not to be sufficient in generating greater product market integration within the region.

Suggested Citation

  • Neil Balchin & Lawrence Edwards & Asha Sundaram, 2015. "A Disaggregated Analysis of Product Price Integration in the Southern African Development Community," Journal of African Economies, Centre for the Study of African Economies, vol. 24(3), pages 390-415.
  • Handle: RePEc:oup:jafrec:v:24:y:2015:i:3:p:390-415.
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    File URL: http://hdl.handle.net/10.1093/jae/ejv004
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    Cited by:

    1. Mamello A Nchake & Lawrence Edwards & Tresor N Kaya, 2019. "The Size of the Border and Product Market Integration Between Lesotho and South Africa: A Production–Consumption Approach," Journal of African Economies, Centre for the Study of African Economies, vol. 28(1), pages 70-88.
    2. Robinson, Amanda Lea, 2016. "Internal Borders: Ethnic-Based Market Segmentation in Malawi," World Development, Elsevier, vol. 87(C), pages 371-384.
    3. A. Nchake Mamello & Edwards Lawrence & N. Kaya Tresor, 2017. "Working Paper 272 - Price effects of borders between Lesotho and South Africa," Working Paper Series 2389, African Development Bank.
    4. Crucini, Mario J. & Yilmazkuday, Hakan, 2014. "Understanding long-run price dispersion," Journal of Monetary Economics, Elsevier, vol. 66(C), pages 226-240.
    5. Mike Nyawo & Neil Rankin, 2020. "Price adjustment after hyperinflation in Zimbabwe," African Development Review, African Development Bank, vol. 32(2), pages 240-256, June.
    6. Bouët, Antoine & Cosnard, Lionel & Laborde, David, 2017. "Measuring Trade Integration in Africa," Journal of Economic Integration, Center for Economic Integration, Sejong University, vol. 32(4), pages 937-977.
    7. Bernard Hoekman & Dominique Njinkeu, 2017. "Integrating Africa: Some Trade Policy Research Priorities and Challenges," RSCAS Working Papers 2017/43, European University Institute.

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