価格カルテルにおける共同性の認定と立証 ― ポリプロピレン価格カルテル事件判決を素材として ―
Antitrust Analysis of the Mutual Understanding over Price Cartels ― Case Study: Japanese Polypropylene Price Cartel Case ― 가격カルテルにおける공동성の인정と입증 ― ポリプロピレン가격カルテル사건판결を소재として ―
This article discusses how to establish “the mutual understanding” toward Restraints of Trade in Japanese Antimonopoly Law, focusing on the recent case, “Polypropylene Price Cartel Case” judged by Tokyo High Court (25 Sept.2009). Any antitrust authority all over the world confronts difficulties in identifying an agreement or intent upon cartel. To analyze communications among competitors is quite decisive, but to what extent must be shown and where is crucial divide between illegal and legal? A present attitude in this case is examined critically.