This note analyzes di¤erent types of all-pay auctions when the number of bidders becomes large. We compute the distributions of the highest bids for the …rst-price all pay auction and we show that the expected payment made by the winning bidder converges to half of the total payments. In the second-price all-pay auction (the war of attrition), the highest bid amounts to about 35.5 % of the tota...

Private provision of public goods often takes place as a war of attrition: individuals wait until someone else volunteers and provides the good. After a certain time period, however, one individual may be randomly selected. If the individuals are uncertain about their cost of provision, but can find out about this cost ahead of the volunteering game, a strategic value is attached to the informa...

This paper presents a research model, which is built on communication theory (Shannon and Weaver 1948) and DeLone and McLean’s (1992, 2003) information system model, to identify eCommerce website success dimensions. The research model is aiming to make a contribution to literature by identifying and incorporating dimensions of success relevant to eCommerce websites. Further empirical research i...

We propose a multivariate model for the number of hits on a set of popular websites, and show it to accurately reflect the behavior recorded in a data set of Internet users in the United States. We assume that the random vector of visits is distributed according to a censored multivariate normal with marginals transformed to be discrete Pareto IV and, following the ideas of Gaussian graphical m...

We find that preference for websites, like preference for objects in the offline world, is influenced by personality. We combine personality profiles and website choices of more than 160.000 users and investigate whether different websites attract audience of different personality. Using two independent sources of website choices, we show that website audiences often have distinct personality p...

The goal of this project was to detect adult websites and pages that are not safe for kids. We use five different techniques. We create an adult vocabulary and use a composite classifier formed of multiple Naïve Bayes classifiers to classify pages based on url, title, keywords and content. We use hue, saturation and histogram of gradients to train random forests, different boosting classifiers ...

By using a search engine such as Google, a security breach in a website can be located. There are two types of vulnerabilities, software vulnerabilities and misconfigurations. Majority of the hackers try to exploit already known misconfigurations and locate a system that has a similar security flaw. The aim of this report is to examine such vulnerabilities by practically trying to penetrate a w...

In this paper we describe a system for boat traffic monitoring that has been realized for analyzing and computing statistics of trafic in the Grand Canal in Venice. The system is based on a set of survey cells to monitor about 6 Km of canal. Each survey cell contains three cameras oriented in three directions and covering about 250-300 meters of the canal. This paper presents the segmentation a...