IDEAS home Printed from
   My bibliography  Save this article

Territorial Restrictions and Consumer Welfare in a Mixed Oligopoly: The Japanese Gas Supply Market (in Japanese)


  • Eiji SATOH


This study empirically examines the welfare effects of territorial restrictions on town gas services in Japan by modeling the choice of gas service made by a set of households. The Japanese gas market includes two major types of gas services: the liquefied petroleum (LP) gas service and the town gas service. Although LP gas prices and LP gas service areas are not regulated, town gas prices and town gas service areas are heavily regulated by the government. Particularly, territorial restrictions on town gas services essentially prohibit providers of town gas from expanding their service area. Logically, the government should readjust town gas service areas frequently in response to demand. However, town gas service areas have not been readjusted. Territorial restrictions on town gas service areas could cause a loss in consumer welfare. Using data on the Japanese gas market for the period from 1998 to 2005, and deploying a two-stage procedure, this study analyzes whether territorial restrictions on Japanese town gas services cause a loss in consumer welfare. First, a demand model, assumed to have a nested logit structure, is estimated. The estimation reveals that the characteristics of gas services play a significant role in demand substitution between town gas and LP gas. Second, using the estimated demand parameters, a simulation exercise is conducted; the outcome indicates that an expansion of town gas services to areas without town gas pipelines has allowed some households to switch from LP gas to town gas. In the static Cournot competition among LP gas suppliers, this switch results in an intensification of competition among these suppliers, leading to a decrease in LP gas prices (5.8%) and a consequent improvement in consumer welfare (13.8%). These results suggest that the government should facilitate an expansion of town gas services to areas without town gas pipelines. JEL Classification: L43, L95

Suggested Citation

  • Eiji SATOH, 2015. "Territorial Restrictions and Consumer Welfare in a Mixed Oligopoly: The Japanese Gas Supply Market (in Japanese)," Economic Analysis, Economic and Social Research Institute (ESRI), vol. 189, pages 25-42, February.
  • Handle: RePEc:esj:esriea:189b

    Download full text from publisher

    File URL:
    Download Restriction: no

    More about this item


    consumer welfare; simulation analysis; territorial restrictions;

    JEL classification:

    • L43 - Industrial Organization - - Antitrust Issues and Policies - - - Legal Monopolies and Regulation or Deregulation
    • L95 - Industrial Organization - - Industry Studies: Transportation and Utilities - - - Gas Utilities; Pipelines; Water Utilities


    Access and download statistics


    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:esj:esriea:189b. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (KAWAMOTO Takuma). General contact details of provider: .

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service hosted by the Research Division of the Federal Reserve Bank of St. Louis . RePEc uses bibliographic data supplied by the respective publishers.