This paper considers trial-offer and freemium markets where consumer preferences are modeled by a multinomial logit with social influence and position bias. The social signal for a product i is of the form φi , i.e., its market share raised to power r. The paper shows that, when 0 < r < 1 and a static position assignment (e.g., a quality ranking) is used, the market converges to a unique equili...

At present, all value at risk (VaR) implementations ± i.e., all risk measures of thè`maximum loss at a given level of con®dence'' type ± are based on the assumption that the portfolio mix will not change before the VaR horizon. This hypothesis may be unrealistic, especially when the VaR horizon is established by the regulators (BIS). At the opposite, we measure VaR dynamically, i.e., taking int...

This paper considers trial-offer markets where consumer preferences are modeled by a multi-nomial logit with social influence and position bias. The social signal for a product is givenby its current market share raised to power r (or, equivalently, the number of purchases raisedto the power of r). The paper shows that, when r is strictly between 0 and 1, and a staticpositio...

This paper identifies vulnerabilities to recently proposed countermeasures leakage power analysis attacks in FDSOI systems based on the application of a random body bias. The are analyzed and relative difficulty obtain secret key, once taken into account, compared original proposals. A new countermeasure, bias scheme, is then proposed. countermeasure equalization asymmetries static consumption ...

In this paper, we show how beneficial effects of aging on static power consumption can be exploited to design reliable drowsy cache memories adopting dynamic voltage scaling (DVS) to reduce static power. First, we develop an analytical model allowing designers to evaluate the long-term threshold voltage degradation induced by bias temperature instability (BTI) in a drowsy cache memory. Through ...

In a seminal paper Nagar (1959) obtained …rst and second moment approximations for the k-class of estimators in a general static simultaneous equation model under the assumption that the structural disturbances were i.i.d and normally distributed.Later Mikhail (1972) obtained a higher-order bias approximation for 2SLS under the same assumptions as Nagar while Iglesias and Phillips (2010) obtain...

The influence of static electric field on the transport properties in La0.7A0.3MnO3 A=Ca,Ba epitaxial thin films was investigated by using field effect configurations FEC . A single layer manganite film was deposited on LaAlO3 LAO substrate by pulsed laser deposition technique, and then a simple FEC was formed on it using the lithography technique, in which the manganite film was used as a chan...

East Africa has two rainy seasons: the long rains [March–May (MAM)] and the short rains [October– December (OND)]. Most CMIP3/5 coupled models overestimate the short rains while underestimating the long rains. In this study, the East African rainfall bias is investigated by comparing the coupled historical simulations from CMIP5 to the corresponding SST-forced AMIP simulations. Much of the inve...

Grid connected static power converters inject parasitic DC currents due to the offset in current sensing, control imperfections, asymmetries in power switches and other secondary effects. Ever growing number of grid connected converters contributes to an increase of DC bias in AC grids, and this brings the cores of distribution transformers closer to saturation and increases their power losses....