We consider a dynamic voluntary advertising model with a duopoly. Firms can use advertising and price as competitive tools where product quality is a given and the market is not fully covered by consumers. Advertising also plays a role as a public good. In this situation, we investigate how...

We investigate the dynamic relationship between advertising and product quality under duopolistic competition. By using a simplified vertical product differentiation model with voluntary advertising, we show that the firm with larger market share has a larger advertising share and that there is...

In this study, we analyze a dynamic duopoly game in which firms can use advertising and price as competitive tools. The market is assumed to be completely covered in the sense that all consumers purchase a product from one of the two firms. We assume that advertising creates a positive...

Using a differential game, we analyze a multiple agent economy in which there are common and private capital stocks. Each interest group can access the common capital and its own private capital stocks but not anyone else's private capital stocks. Considering the situation in which each interest...

Voracious behavior is one of the excess uses of the commons. It is known that the voracity effect can be observed in the economy with common and private capital. We explore another cause of voracious behavior and investigate the effects of voracious behavior on the economy. For this purpose, we...