TY  - JOUR
AU  - Caballero,Ricardo J.
AU  - Engel,Eduardo M.R.A.
TI  - Microeconomic Rigidities and Aggregate Price Dynamics
JF  - National Bureau of Economic Research Working Paper Series
VL  - No. 4162
PY  - 1992
Y2  - September 1992
UR  - http://www.nber.org/papers/w4162
L1  - http://www.nber.org/papers/w4162.pdf
N1  - Author contact info:
Ricardo J. Caballero
MIT
Department of Economics
Room E52-373a
Cambridge, MA 02142-1347
Tel: 617/253-0489
Fax: 617/253-6915
E-Mail: caball@mit.edu

Eduardo Engel
Yale University
Department of Economics
P.O. Box 208268
New Haven, CT  06520-8268
Tel: 203/432-5595
Fax: 203/432-5779
E-Mail: eduardo.engel@yale.edu
AB  - This paper is an attempt to enrich the characterization of the sluggish behavior of the aggregate price level. Our contribution to this vast literature is to explicitly consider microeconomic heterogeneity and its interaction with nonlinear microeconomic price adjustment policies. The model we propose outperforms the constant-probability-of-adjustment/partial- adjustment model in describing the path of postwar U.S. inflation. Using only aggregate data, we infer that the probability that a firm adjusts its price depends on the sign and the magnitude of the deviation of the price from its target level. At the aggregate level we find that the aggregate price responds less to negative shocks than to positive shocks, that the size of this asymmetry increases with the size of the shock, and that the number of firms changing their prices - and therefore the flexibility of the price level to aggregate shocks - varies endogenously over time in response to changes in economic conditions.
ER  -