TY  - JOUR
AU  - Hall,Robert E.
TI  - Temporal Agglomeration
JF  - National Bureau of Economic Research Working Paper Series
VL  - No. 3143
PY  - 1989
Y2  - October 1989
UR  - http://www.nber.org/papers/w3143
L1  - http://www.nber.org/papers/w3143.pdf
N1  - Author contact info:
Robert E. Hall
Hoover Institution
Stanford University
Stanford, CA  94305-6010
Tel: 650/723-2215
E-Mail: rehall@gmail.com
AB  - When economic activity is concentrated over space or over time, it is more efficient. Most production occurs in geographic hot spots, and most production occurs between 9 and 12 in the morning and 1 to 5 in the afternoon on weekdays. The thick-market efficiencies that encourage the concentration of activity in certain time periods may be internal to the firm, or they may be external to the firm. When they are internal, the firm can make efficient arrangements to take advantage of the effects. The firm should martial all its forces from time to time in bursts of activity. When thick-market effects are external to the firm, the possibility of indeterminacy can arise. Aggregate fluctuations may arise with either  internal or external thick-market effects.
ER  -