Jiro Hodoshima

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This paper investigates the relationship between return and beta using the cross-sectional regression method. Regression of return on beta without differentiating positive and negative market excess returns produces a flat relationship between return and beta. Taking into account the difference between positive and negative market excess returns yields(More)
In this note, we used the observability theory of discrete event systems to formulate and provide an algorithmic approach to the problem of checking the property of intransitive noninterference of security policies. This property plays a key role in the area of security, because it is used to model information flow and the lack of it within multilevel(More)
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