The delay difference model was implemented to fit 21 years of brown tiger prawn (Penaeus esculentus) catch in Moreton Bay by maximum likelihood to assess the status of this stock. Monte Carlo simulations testing of the stock assessment software coded in C++ showed that the model could estimate simultaneously natural mortality in addition to catchability, recruitment and initial biomasses. Appli...

Purpose: The aim of this study is to assess the potential maximum loss in more concentrated investment portfolios and diversified using VaR calculation as a tool for controlling managing market risk. For this, proposes answer following research question: "Do equity funds present less risk?"
 Methodology: historical simulation model was applied, considering seven (FIAs) 493 daily returns, u...

the purpose of resent research is to analysis and compares performance evaluation models of selected investment companies in tehran stock exchange market in the field of their portfolio management. the duration of research was between years 2009-2014. statistical society the research is consisting of all active investment companies in in tehran stock exchange market which were 30 companies. vol...

An automatic stock market categorization system would be invaluable to individual investors and financial experts, providing them with the opportunity to predict the stock price changes of a company with respect to other companies. In recent years, clustering all companies in the stock markets based on their similarities in the shape of the stock market has increasingly become a common scheme. ...

This paper presents a novel Bayesian approach to sheries stock assessment based on biomass dynamics models. These use a time series of annual catch and eeort data to model and forecast the current and future biomass of the stock. We integrate biomass dynamics models into the framework of nonlinear state-space methodology and thus allow for both observation and process error. In contrast to the ...

When there is uncertainty about a CEO’s quality, news about the firm causes rational investors to update their expectation of the firm’s value for two reasons: Updates occur because of the direct effect of the news, and also because news leads investors to update their assessment of the CEO’s quality, which changes expected future cash flows. As a CEO’s quality becomes known more precisely over...