a r t i c l e i n f o This paper analyses how the quality of governance, the size of public spending, and economic development affect the relationship between bureaucratic corruption and economic growth. The analysis shows that the interaction between corruption and governance shapes the efficiency of public spending, which in turn, determines the growth effects of corruption. Specifically, cor...

centralizing and using proper transportation facilities cut down costs and traffic. hub facilities concentrate on flows to cause economic advantage of scale and multimodal transportation helps use the advantage of another transporter. a distinctive feature of this paper is proposing a new mathematical formulation for a three-stage p-hub location routing problem with simultaneous pick-ups and de...

control chart is the most well-known chart to monitor the number of nonconformities per inspection unit where each sample consists of constant size. generally, the design of a control chart requires determination of sample size, sampling interval, and control limits width. optimally selecting these parameters depends on several process parameters, which have been considered from statistical and...

Designing an online resource exchange system is challenging, especially when that system is decentralized and its members fully autonomous. To facilitate the system architecture and protocol design, it is important to understand the behavior of the users and the impact system parameters play on their actions. In this paper we identify key attributes, such as trust and the rate of contribution, ...

I examine the incentives for software providers to design appropriate user interfaces. There are two sorts of costs involved when one uses software: the fixed cost of learning to use a piece of software and the variable cost of operating the software. I show that a monopoly provider of software generally invests the right amount of resources in making the software easy to learn, but too little ...

Spacecraft and launch systems are examples of complex products which require a careful balance between competing concerns, such as performance, weight, and reliability, to serve their mission. Complexity requires design by large engineering organizations, so this balance must be achieved across many teams of people working on various components. This paper uses optimization theory to derive a m...