Although set-up costs are prevalent and substantial in natural resource extraction, their analysis in decentralized markets is difficult. In particular, it is known that a Walrasian competitive equilibrium cannot exist in simple extraction models with set-up costs thus rendering standard competitive equilibrium analysis inapplicable. However, this paper demonstrates that this result is sensitiv...

Cold storage devices such as tape and optical discs are a good solution for reducing the total cost of ownership for storing data. However, there is a drawback in that media and drives are separated, and placing media into drives when accessing data needs a few minutes of time. Though placing correlated data together in the same medium reduces media exchange, multidimensional searches disrupt i...

In this paper, we consider a food-limited population model with delay and feedback control. By applying the comparison theorem of the differential equation and constructing a suitable Lyapunov functional, sufficient conditions which guarantee the permanence and existence of a unique globally attractive positive almost periodic solution of the system are obtained. Keywords—Almost periodic soluti...

Income tax is one of the most important costs of companies and it is usually considered as a cost that should not be paid. One of the most noticeable and influential factors in tax avoidance is corporate ownership structure. With an emphasis on institutional ownership and its types in this paper, it is attempted to measure the effect of this ownership and its types on corporate tax avoidance. F...

This two-part article considers how digital culture has influenced ideas about permanence. It examines the change in collecting practices in one legal deposit library. The author considers how the idea of permanence, understood in cultural heritage terms, influences digital culture, and, thus, digital technology. The first part of the article addresses the concepts associated with permanence, d...

Here, a predator-prey model with Hassell-Varley type functional responses is studied. Some sufficient conditions are obtained for the permanence and global asymptotic stability of the system by using comparison theorem and constructing a suitable Lyapunov functional. Moreover, an example is illustrated to verify the results by simulation.