Several consumer demand choices are characterized by the choice of multiple alternatives simultaneously. An example of such a choice situation in activity-travel analysis is the type of discretionary (or leisure) activity to participate in and the duration of time investment of the participation. In this context, within a given temporal period (say a day or a week), an individual may decide to ...

Empirical studies show that there is stronger dependency between large losses than large profit in financial market, which undermine the performance of using symmetric distribution for modeling these asymmetric. That is why the assuming normal joint distribution of returns is not suitable because of considering the linier dependence, and can be lead to inappropriate estimate of VaR. Copula theo...

A principally new approach to the design of identification algorithms is suggested. Under this approach, the consistency of an estimate is reached by the special nonlinear transformation of discrepancy rather than by diminishing the algorithm step value. Copyright © 2001 IFAC

Recessions appear to be times when the marginal rate of substitution between goods and workers’ time falls below the marginal product of labor. If so, the allocation of workers’ time is inefficient. I develop a model of households and production that reconciles cyclical movements in the marginal value of time and the marginal product. The model embodies the findings of research that the Frisch ...

In this paper, the CFD-DEM coupling method was utilized to study water cleaning and regeneration process of fibrous filter material. The effects flow rate, time adhesion force on particle removal were simulated. results showed that rate had a diminishing marginal effect with increasing rate. More than 80% particles removed in initial period, then tended stabilize. higher shorter needed achieve ...

In a sponsored search auction the advertisement slots on a search result page are generally ordered by click-through rate. Bidders have a valuation, which is usually assumed to be linear in the click-through rate, a budget constraint, and receive at most one slot per search result page (round). We study multi-round sponsored search auctions, where the different rounds are linked through the bud...