Economics at your fingertips  


Kenneth Hendricks and Randolph McAfee

Economic Inquiry, 2010, vol. 48, issue 2, 391-414

Abstract: In horizontal mergers, concentration is often measured with the Hirschman–Herfindahl Index (HHI). This index yields the price–cost margins in Cournot competition. In many modern merger cases, both buyers and sellers have market power, and indeed, the buyers and sellers may be the same set of firms. In such cases, the HHI is inapplicable. We develop an alternative theory that has similar data requirements as the HHI, applies to intermediate good industries with arbitrary numbers of firms on both sides, and specializes to the HHI when buyers have no market power. The more inelastic is the downstream demand, the more captive production and consumption (not traded in the intermediate market) affects price–cost margins. The analysis is applied to the merger of the gasoline refining and retail assets of Exxon and Mobil in the western United States. (JEL L13, L41)

Date: 2010
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9) Track citations by RSS feed

Downloads: (external link)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link:

Ordering information: This journal article can be ordered from
http://www.blackwell ... bs.asp?ref=0095-2583

Access Statistics for this article

Economic Inquiry is currently edited by Preston McAfee

More articles in Economic Inquiry from Western Economic Association International Contact information at EDIRC.
Bibliographic data for series maintained by Wiley Content Delivery ().

Page updated 2020-04-08
Handle: RePEc:bla:ecinqu:v:48:y:2010:i:2:p:391-414