TY  - JOUR
AU  - Jovanovic,Boyan
AU  - Rousseau,Peter L.
TI  - The Q-Theory of Mergers
JF  - National Bureau of Economic Research Working Paper Series
VL  - No. 8740
PY  - 2002
Y2  - January 2002
UR  - http://www.nber.org/papers/w8740
L1  - http://www.nber.org/papers/w8740.pdf
N1  - Author contact info:
Boyan Jovanovic
New York University
Department of Economics
19 W. 4th Street, 6th Floor
New York, NY  10012
Tel: 212/998-8953
Fax: 212/995-4186
E-Mail: Boyan.Jovanovic@nyu.edu

Peter L. Rousseau
Department of Economics
Vanderbilt University
VU Station B #351819
2301 Vanderbilt Place
Nashville, TN 37235-1819
Tel: 615/343-2466
E-Mail: peter.l.rousseau@vanderbilt.edu
AB  - The Q-theory of investment says that a firm's investment rate should rise with its Q. We argue here that this theory also explains why some firms buy other firms. We find that 1. A firm's merger and acquisition (M&A) investment responds to its Q more -- by a factor of 2.6 -- than its direct investment does, probably because M&A investment is a high fixed cost and a low marginal adjustment cost activity, 2. The typical firm wastes some cash on M&As, but not on internal investment, i.e., the 'Free-Cash Flow' story works, but explains a small fraction of mergers only, and 3. The merger waves of 1900 and the 1920's, `80s, and `90s were a response to profitable reallocation opportunities, but the `60s wave was probably caused by something else.
ER  -