Changing partners in Russia can be a fraught affair, to which the tribula tions of Anna Karenina are as good a guide as any. But sometimes there is no choice. bp's relationship with a group of oligarchs who owned half of tnk-bp, the com pany's Russian joint venture, had broken down so completely that it was only a mat ter of time before one side or the other was forced to quit.
展开▼