Key points are not available for this paper at this time.
‘I must confess that the exact mechanics by which the total power possessed by the firm gets to be larger than the sum of the parts (in individual markets) escape me, and I'm not sure that there are any companies that meet the specifications of the conglomerate firm.’ (G. Stigler, ‘Mergers and Preventive Antitrust Policy’.)
J. D. Gribbin (Mon,) studied this question.