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...

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...

It is well known that the so-called voracity effect can be observed in an economy with common and private capital. Voracious behavior is regarded as one of the excess uses of the commons. In this paper, we explore a new interpretation of what causes voracious and investigate the effects of...

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...

It is well known that the so-called voracity effect can be observed in an economy with a weak property rights system. Voracious behavior is regarded as one of the excess uses of the common assets. In this paper, we seek to examine voracious behavior from a different perspective by introducing a...

This paper shows that, in a R&D-based growth model in which vertical and horizontal innovations occur simultaneously, increasing the capital income tax leads to faster growth. For this result to hold, the production function for both vertical and horizontal innovations must have constant returns...

This paper shows that, in a R&D-based growth model in which vertical and horizontal innovations occur simultaneously, increasing the capital income tax leads to faster the productivity growth and a welfare growth. For this result to hold, the production function for both vertical and horizontal...

Depletion of water resources requires us to search for non-conventional strategies for water preservation and irrigation. Sustainable management of such water resources along with the development of sustainable irrigation systems will contribute to the stability of agricultural yield that is a...

This paper focuses on the drastic increase observed in the Japanese male suicide rate in the late 1990s and early 2000s and confirms unemployment and personal bankruptcy to be the associated socioeconomic factors behind the male suicide variation. Personal bankruptcy is also confirmed to be...