A reduced-form equation for UN peacekeeping contributions is derived, based on a joint product model of peacekeeping for which both nation-specific and worldwide benefits are associated with peacekeeping. A peacekeeping demand equation is then estimated for each of the 25 primary contributing...

This paper quantifies the impact that terrorism has had on tourism since 1970. To accomplish this task, the authors estimate a forecasting equation for a country's (region's) share of tourism using an ARIMA model with a transfer function based on the time series of terrorist attacks in the...

This paper uses spectral analysis to provide evidence that cycles have characterized the following time series: all ter rorist events, skyjackings, kidnappings, barricade and hostage taking and all events not involving hostages. The series for all events ha d a periodicity of 28 months, while...

This paper focuses on the future of the defence firm. It forecasts that the defence firm of 2050 will be radically different, reflecting a combination of technology, economic and political factors. To provide insights into the future, the paper starts by outlining recent changes in the size,...

Dieser Aufsatz unterscheidet vier Arten des Gefangenendilemmaspiels -öffentliche Güter, Allmen-degüter, Egoismus und Altruismus - aufgrund des Öffentlichkeitsgrads der Kosten und Nutzen. Ob-wohl jedes dieser Spiele die gleiche 2 × 2 ordinale Spielform hat, unterscheiden sie sich...