Previous studies on “tying” are based on the premise that there are clear boundaries between tied products. However, in the computing industry there are constant battles over boundaries between complementary products. A dominant firm in one layer of a multilayered system usually attempts to extend into other layers by including some of the latter’s functions into its own products. For instance,...

Empirical literature consistently challenges the rationality assumption of individuals’ behaviour in dynamic situations and in teamwork environments. Here I examine rational forward-looking behaviour in a dynamic team competition with multi-period “battles”. Using field data from professional squash team tournaments (820 matches), I provide evidence consistent with the game-theoretical predicti...

Harmonia axyridis has been introduced as a biological control agent in Europe and the USA. Since its introduction, it has established and spread, and it is now regarded as an invasive alien species. It has been suggested that intraguild predation is especially important for the invasion success of H. axyridis. The aim of this study was to compare the intraguild predation behaviour of three lady...

We are researching the problem of plan recognition in a complex real-world domain consisting of training battles conducted by actual troops at the US Army’s National Training Center. These battles involve hundreds of participants, last several days, and take place over a very large geographical area. Our task is to identify from this data repeated patterns of movement which correspond to planne...

Abstract It is proved that all sufficiently large integers n can be represented as n = x 1 2 + 3 ⋯ 13 14 , n=x_{1}^{2}+x_{2}^...