In winner-take-all tournaments, agents' performance is determined jointly by effort and luck, and the top performer is rewarded. We study the impact of the ''shape of luck'' -- the details of the distribution of performance shocks -- on incentives in such settings. We are concerned with the...

The pricing's premium in an insurance for the health sector is influenced by the claims ratio of its subscribers, which generates high levels of fluctuation and uncertainty. The objective of this research is the application of the actuarial individual risk models, collective risk and credibility...

In ecological and environmental sampling the quantification of units is either difficult or overly demanding in terms of the time, money, workload, it requires. For this reason efficient and cost-effective sampling methods need to be devised for data collecting. The most commonly used method for...

The Weibull distribution is used to describe various observed failures of phenomena and widely used in survival analysis and reliability theory. Sometimes it is very difficult to compute moments of such distributions due to various reasons for e.g. analytical issues, multi parameter cases etc....

Nowadays, university rankings are used to assess all aspects of universities. Due to the impact of university rankings on assessing the performance of universities, this research aims to explore university rankings in depth. University rankings are considered contributors to assessing university...

We propose to establish wine rankings using scores that depend on the differences between favorable and unfavorable opinions about each wine, according to the Borda rule. Unlike alternative approaches and specifications, this method is well-defined even if the panelists' quality relations are...

Internet freedom rankings are a comparative tool that serves as an evaluative shorthand in decision-making contexts internationally. Understanding their aims and how they define internet freedom, as well as the power relationships within the ranking ecosystem, can reveal a lot about their...

Nowadays, the denomination of "smart" is associated with several production and management devices and to logistics and distribution, too. Thus, this qualification is used in different application fields. All of them are different and diverse, but the most important common characteristics of...

This study investigates the effects of city size and administrative rank on rural-urban migration in China and examines the factors that influence the city size effect. We focus on unemployed while job-seeking migrants. Using data from the China Migrants Dynamic Survey for 2016 and 2017, we find...