Abstract
In this paper, we examine signals in a market where asymmetric information is only available between sellers and buyers by agent-simulations to avoid the quality deterioration in a market. Our analysis and simulations show that the quality deterioration can be avoided when sellers employ a quality-related signals whose cost depends on their quality rate, and when the cost of goods, the amount of goods, and the cost of signals are appropriately determined. Besides, we show the reason why sudden fluctuations of good quality occur in a market with quality-related signals through our computer simulation.
