We generalise the Siegel–Voloch theorem about S-integral points on elliptic curves as follows: let K/F denote a global function field over a finite field F of characteristic p ≥ 5, let S denote a finite set of places of K and let E/K denote an elliptic curve over K with jinvariant jE / ∈ K. Fix a function f ∈ K(E) with a pole of order N > 0 at the zero of E. We prove that there are only finitel...

In this paper we study the risk perception of traffic participants. Firstly, we give an overview of previously used methodologies for the monetary valuation of transport safety. These methodologies do not distinguish between the individual’s assessment of probabilities and her valuation of possible outcomes. A great disadvantage of these approaches is therefore that one has to make the assumpti...

This paper shows that in a private value setting in which one bidder may at any time reÞne her assessment of her valuation at some positive cost, the ascending price auction induces higher expected welfare than the sealed-bid second price auction does. When the number of bidders is above a threshold, it generates higher revenue as well. In the ascending price auction, a key feature of equilibri...

Non-positive at infinity valuations are a class of real plane which have nice geometrical behavior. They divided in three types. We study the dual graphs non-positive and give an algorithm for obtaining them. Moreover we compare these attending type their corresponding valuation.

Meta-analysis has increasingly been used to synthesise the environmental valuation literature, but only a few test the use of these analyses for benefit transfer. These are typically based on national studies only. However, meta-analyses of valuation studies across countries are a potentially powerful tool for benefit transfer, especially for environmental goods where the domestic literature is...

soil conservation is one of the most important regulative functions of natural ecosystems. this function is of high importance in taleghan watershed due to high erosion quantity and sediment accumulation in taleghan dam reservoir. soil loss reduction, sedimentation control and fertility conservation were considered as different aspects of soil conservation. effect of land use and vegetation cov...

This paper incorporates an annual probability of corporate failure into a standard equity valuation model, as an alternative or complementary correction for risk that improves in several ways over conventional risk premia or ad hoc adjustments to assumed growth rates. Though the correction is nonlinear, it can be reduced to an equivalent function that enters the valuation equation in the tradit...

How do people value environmental resources? To estimate public valuation of natural resources, researchers often conduct surveys that ask people how much they would be willing to pay to preserve or restore threatened natural resources. However, these survey responses often elicit complex affective responses, including negative reactions toward proposed destructive land uses of those resources....

Although anecdotal evidence and individual case studies suggest that effective knowledge management (KM) initiatives contribute to superior firm performance, quantitative empirical investigations are scarce, and more to the point, most of them are based on perceptions of survey participants embedded in the firms being studied. Moreover, studies analyzing the question of whether superior KM perf...

We investigate a common value bilateral bargaining model with two sided private information and no aggregate uncertainty. A seller owns an asset whose common valuation is a deterministic function of the two traders’private signals. We …rst establish a no-trade theorem for this environment, and proceed to study the e¤ect of the asset valuation structure and the trading mechanism on extent to whi...