We present a stock-effort dynamical model of a fishery subdivided into fishing zones. The stock corresponds to a fish population moving between these zones, on which they are harvested by fishing fleets. We consider a linear chain of identical fishing zones. Fish movements between the zones, as well as vessels displacements, are assumed to take place at a faster time scale than the variation of...

the aim of this paper is analyzing the role of psychology of numbers in financial markets and in this area, investigates the price clustering phenomenon in trading prices of tehran stock exchange. price clustering is one of anomalies that have been observed in financial markets that representative psychological biases or tendency to specific numbers in the market. this phenomenon includes of de...

A large empirical literature has reported that the futures market contains valuable information for explaining stock returns and that stock returns display signi ̄cant cross-correlations internationally. A parallel literature has recorded evidence that the distribution of stock returns is close to a mixture of normal distributions and that Markov switching models may therefore provide an adequat...

BACKGROUND Standing dead trees are one component of forest ecosystem dead wood carbon (C) pools, whose national stock is estimated by the U.S. as required by the United Nations Framework Convention on Climate Change. Historically, standing dead tree C has been estimated as a function of live tree growing stock volume in the U.S.'s National Greenhouse Gas Inventory. Initiated in 1998, the USDA F...

In terms of the stock exchange returns, we compute the analytic expression of the probability distributions FDAX,+ and FDAX,− of the normalized positive and negative DAX (Germany) index daily returns r(t). Furthermore, we define the α re-scaled DAX daily index positive returns r(t) and negative returns (−r(t)) that we call, after normalization, the α positive fluctuations and α negative fluctua...

We demonstrate a density projection approximation method for solving resource management problems with imperfect state information. The method expands the set of partiallyobserved Markov decision process (POMDP) problems that can be solved with standard dynamic programming tools by addressing dimensionality problems in the decision maker's belief state. Density projection is suitable for uncert...

Article history: Received 13 January 2016 Received in revised form 20 August 2016 Accepted 28 September 2016 Available online 20 October 2016 This investigation offers an initial foray into the application of geo-tagged Twitter data for generating insights within two areas of retail geography: establishing retail centre locations and defining catchment areas. Retail related Tweets were identifi...