We prove that the Poisson distribution maximises entropy in the class of ultralog-concave distributions, extending a result of Harremoës. The proof uses ideas concerning log-concavity, and a semigroup action involving adding Poisson variables and thinning. We go on to show that the entropy is a concave function along this semigroup. 1 Maximum entropy distributions It is well-known that the dist...

When marginal utility is convex and there is pure labour income uncertainty, certain results are well-known: there is an upward tilt to the expected consumption time pro le; the slope of the time pro le will be independent of the current level of cash-in-hand; and the marginal propensity to consume is a nonlinear, decreasing function of current assets. Asset return uncertainty is often assumed ...

Software systems are becoming heterogeneous: instead of a small number of large programs from well-established sources, a user’s desktop may now consist of many smaller components that interact in intricate ways. Some components will be downloaded from the network from sources that are only partially trusted. A user would like to know that a number of security properties hold, e.g. that persona...

Concurrent brain responses to separate auditory and visual targets 1 [Running head: Concurrent brain responses to crossmodal targets] 2 Paola Finoia, Daniel J Mitchell, Olaf Hauk, Christian Beste, Vittorio Pizzella, John Duncan 4 3 4 1. MRC Cognition and Brain Sciences Unit, 15 Chaucer Road, Cambridge CB2 7EF, UK 5 6 2. Cognitive Neurophysiology, Department of Child and Adolescent Psychiatry, 7...

1. BORTHWICK, H. A. & S. 8. HENDRICKS. 1960. Photoperiodism ini plaints. Scienice 132: 1223-28. 2. BUTLER, WV. L., K. H. NORRIs, H. WV. SIEGELI MAN, & S. B. HENDRICKS. 1959. DetectioIn, assav, & preliminary purification of the pigmenit controllinig photoresponsive developmenit of plants. Proc. Natl. Acad. Science 45: 1703-08. 3. GORNALL, A. G., C. J. BARDAWVILL, & Mf. M. D.AN-ID. 1949. Determin...

(a) Jonathan A. Batten, Department of Finance, Hong Kong University of Science & Technology, Sai Kung, Hong Hong, Phone: ++852-2358-7688, Email: [email protected]. (b) Wai-Sum Chan, Department of Finance, The Chinese University of Hong Kong, 426D, Leung Kau Kui Building, New Territories, Hong Kong, Phone: +852 2609 7715, Email: [email protected]. (c) Hon-Lun Chung, School of Accountin...