Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
The authors interpret fluctuations in GNP and unemployment as due to two types of disturbances: disturbances that have a permanent effect on output and disturbances that do not. They interpret the first as supply disturbances, the second as demand disturbances. Demand disturbances have a hump-shaped, mirror-image effect on output and unemployment. The effect of supply disturbances on output increases steadily over time, peaking after two years and reaching a plateau after five years. Copyright 1989 by American Economic Association.