The article presents eleven theories advanced to explain school crime, the subject of the inconclusive Safe Schools Study coordinated by James Samuel Coleman, then collects 90 statistical measures across the 215 public schools in one of the most violent school districts in the United...

Since national independence and national unification are often viewed as norms of the international polity, divided states and peoples are considered abnormal, and there are a variety of theories seeking to show how a divided people can achieve unification. Some theories stress the role of...

The continuing absence of innovation in Europe's mobile services industry is identified and characterised here, with such examples as mobile Internet and mobile music. Innovation failure is a critical factor leading to a lack of high-income jobs, network effects, and price reductions for data...