I use data on the hiring practices and spatial location of firms in four cities to model the process of interfirm racial segregation. When I control for the spatial location of the firm, the use of employee referrals reduced the probability of hiring a black worker by 75% in firms that are less than 10% black. Among all firms, the results suggest that employee referrals are just as important as...

This contribution outlines the broad historical implications of scientific research on the Transcendental Meditation program for developing enlightened individuals, an enlightened society, cultural integrity, and world peace. This address, presented in October 1974, includes Maharishi's projection that one percent of a population participating in the Transcendental Meditation program will cause...

Very recently, four diierent types of instances of the Euclidean Traveling Salesman Problem (ETSP) on the plane have been introduced. The coordinates of the cities have been deened by geometric iterative constructive processes. For each one of these instances, a unique optimal tour through the cities has been provided. Due to the nature of the constructive processes and the induction proofs of ...

The extraction of a clear and simple footprint of the structure of large, weighted and directed networks is a general problem that has relevance for many applications. An important example is seen in origin-destination matrices, which contain the complete information on commuting flows, but are difficult to analyze and compare. We propose here a versatile method, which extracts a coarse-grained...

In the global knowledge economy, to attract and retain knowledge-intensive industries and workers, cities produce various development strategies. Such strategising is an important development mechanism for cities to complete their transformation into knowledge cities. This paper discusses the critical connections between knowledge city foundations and integrated knowledge-based urban developmen...

background : this comprehensive study was conducted on multi-purpose one-humped camel ( camelus dromedarius ) sera and ticks to assess the epidemiological aspects of the crimean-congo hemorrhagic fever virus (cchfv) in northeast iran. methods : from may 2012 to january 2013, eleven cities were randomly selected in the khorasan provinces of iran as “clusters,” and at least 14 one-humped camels w...

While police levels may affect crime, governments may react to crime by increasing police levels. The instrumental variables (IV) approach to this problem has proven difficult due to the problem of locating instruments for police levels. Using panel data from over 5000 cities (1990–2001), we instrumented police levels with two types of federal law enforcement grants, thus yielding over-identifi...

It is possible to partially order cities according to the informativeness of neighborhoods about their ethnic groups. It is also possible to partially order cities with two ethnic groups according to the Lorenz criterion. We show that a segregation order satisfies four well-established segregation principles if and only if it is consistent with the informativeness criterion. We then use this re...

Introduction It is often said that the majority of surgery in Africa occurs in cities because the surgeons prefer to live in the cities. This is certainly true in Malawi where all the country’s practising surgeons live in the four main towns. We have recently reported (1) on the low level of surgical activity in district hospitals despite several new district hospitals being built with multiple...

This paper investigates Sequential Halving as a selection policy in the following four partially observable games: Go Fish, Lost Cities, Phantom Domineering, and Phantom Go. Additionally, H-MCTS is studied, which uses Sequential Halving at the root of the search tree, and UCB elsewhere. Experimental results reveal that H-MCTS performs the best in Go Fish, whereas its performance is on par in Lo...