この章において「市場占有率」とは、一定の取引分野において一定の期間内に供給される商品若しくは役務の数量のうち一若しくは二以上の事業者が供給し、若しくは供給を受ける当該商品若しくは役務の数量の占める割合又は一定の取引分野において一定の期間内に供給される商品若しくは役務の価額のうち一若しくは二以上の事業者が供給し、若しくは供給を受ける当該商品若しくは役務の価額の占める割合をいう。
The term "market share" as used in this Chapter means the ratio of the volume of goods or services that one or two or more enterprises supplies or receives, to the aggregate total volume of the relevant goods or services supplied in any particular field of trade within a particular period, or the ratio of the value of goods or services that one or two or more enterprises supply or receive, to the aggregate total value of the relevant goods or services supplied in any particular field of trade within a particular period.