Attentional cues may increase the detectability of a stimulus by increasing its signal-to-noise ratio (signal enhancement) or by increasing the efficiency of the observer's decision making by reducing uncertainty about the location of the stimulus (uncertainty reduction). Although signal enhancement has typically been found in detection tasks only when stimuli are backwardly masked, some recent...

Although revenue management (RM) originates from service industries, its ideas are also relevant for manufacturing environment. In this paper, we consider RM approaches for demand fulfillment in a make-to-stock (MTS) production system with known exogenous replenishments and stochastic demand from multiple customer classes. We propose a safety margin model which borrows the “safety stock” idea f...

Does risk aversion amplify business cycle downturns? I study the risk exposure of CEOs and its effect on firm investment in times of high macroeconomic uncertainty. Exploiting exogenous variation in CEO equity ownership, I show that firms with larger CEO stakes decrease investment significantly more in periods of high uncertainty. I consider whether better shareholder alignment explains this fi...

this paper empirically investigates the relationship between cpi inflation uncertainty, and private investment in the iranian economy from 1988 to 2010 by using quarterly data. we employ a bivariate var(5)-garch(1,1)-in-mean with diagonal bekk model to discover in a unified framework how are the interactions between the variables. in the model, conditional variance of inflation and private inve...

This article considers unbiased prediction of levels when data series are modeled as a random walk with drift and other exogenous factors after taking natural logs. We derive the unique predictors for growth its variance. Derivation level forecasts is more involved because last observation enters conditional expectation highly correlated parameter estimates, even asymptotically. leads to concep...

In this paper, we investigate the effectiveness of conventional and unconventional monetary policy measures by European Central Bank (ECB) conditional on prevailing level uncertainty. To obtain exogenous variation in central bank policy, rely high-frequency surprises financial market data for euro area (EA) around announcement dates. We trace dynamic effects shocks to short-term rate, forward g...

Abstract: In order that the nth-order Generalized Frequency Response Function (GFRF) for nonlinear systems described by a NARX model can be directly written into a more straightforward and meaningful form in terms of the first order GFRF and model parameters, the nth-order GFRF is now determined by a new mapping function based on a parametric characteristic. This can explicitly unveil the linea...

In practice, it is usually difficult to obtain the physical model of nonlinear, rotor-bearing systems due to uncertain nonlinearities. In order to solve this issue to conduct the analysis and design of nonlinear, rotor-bearing systems, in this study, a data driven NARX (Nonlinear Auto-Regressive with exogenous inputs) model is identified. Due to the lack of the random input signal which is requ...

A principal seeks to persuade an agent accept offer of uncertain value before a deadline expires. The can generate information, but exerts no control over exogenous outside information. combined effect the and information creates incentives for keep uncertainty high in first periods so as close deadline. We characterize equilibrium, compare it single-player decision problem which is agent’s onl...

a 2 × 3 factorial experiment was conducted to investigate the effect of enzyme endofeed w (eew) at 0 and 0.05%, thyme essential oil (teo), probiotic primalac® (pp) and non-feed additive, on intestinal histomorphology of broilers fed wheat-based diet. each of the 6 dietary treatments was replicated 4 times with 12 chicks each from 0 to 42 days of age. there was no interaction between enzyme and ...