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Passing through the supply chain: Implications for market power

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  • Melo, Carolina
  • Moita, Rodrigo
  • Sunao, Stefanie

Abstract

In this paper, we study the connection between pass-through and market power in the Brazilian Liquefied Petroleum Gas (LPG) industry. We use a state tax shock and apply a difference-in-differences strategy to estimate pass-through – at different levels of the supply chain – and an instrumented difference-in-differences strategy to estimate demand, and then feed a theoretical model to make inferences about a conduct parameter – that measures market power. We find an incomplete pass-through at the distribution level and for the supply chain as a whole, and a more-than-complete one at the retail level. Furthermore, we estimate price-elasticity of demand to be greater than one. When we feed a theoretical model of pass-through under imperfect competition with these estimates, we obtain a high conduct parameter at the whole supply chain level and an even higher one at the retail level alone. These results show that considering only the whole supply chain pass-through may lead to hasty conclusions about market power. Besides contributing to the empirical literature that connects pass-through with market power, we contribute to on-going national discussions regarding competitiveness in the LPG industry.

Suggested Citation

  • Melo, Carolina & Moita, Rodrigo & Sunao, Stefanie, 2021. "Passing through the supply chain: Implications for market power," International Journal of Industrial Organization, Elsevier, vol. 79(C).
    • Handle: RePEc:eee:indorg:v:79:y:2021:i:c:s0167718721000886
    DOI: 10.1016/j.ijindorg.2021.102796
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    More about this item

    Keywords

    Pass-through; Market power; Conduct parameter; Supply chain; Gas industry; Difference-in-differences;
    All these keywords.

    JEL classification:

    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L95 - Industrial Organization - - Industry Studies: Transportation and Utilities - - - Gas Utilities; Pipelines; Water Utilities
    • H22 - Public Economics - - Taxation, Subsidies, and Revenue - - - Incidence
    • Q41 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - Demand and Supply; Prices

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