This paper examines the well know day of the week effect on stock returns. Various approaches have been developed and applied in order to examine calendar effects in stock returns and to formulate appropriate financial and risk portfolios. We propose an alternative approach in the estimation of...

Firm productivity and performance and their determinants are a well addressed topic in the field of management and industrial organization. However, how different job satisfaction domains affect the firm performance remains relatively rare. The aim of this study is to explore the impact of seven...

This paper examines the factors that are contribute at the most explained and efficient way to health expenditures in Greece. Two methods are applied. Multiple regressions and vector error correction models are estimated, as also unit root tests applied to define in which order variables are...

This paper examines the estimation and forecasting performance of ARIMA models in comparison with some of the most popular and common models of neural networks. Specifically we provide the estimation results of AR-GRNN (Generalized regression neural networks) and the AR-RBF (Radial basis...

The aim of this paper is to test for and model for non-linearities in the spot exchange rate Greece-U.S.A.. To exploit for non-linear dependencies we apply the Smoothing Transition Autoregressive (STAR) models family and we examine if there is actually a non-linear behavior or not on the...

We examine two stocks of Athens Exchange Stock Market, that of 'Coca-Cola' and 'Compucon'. We analyze the arbitrage pricing theory (APT) model and the Capital Asset Pricing Model (CAPM) and we compare the performance between them. Then we develop a neural network model in Synapse Software with...

This paper presents the classic-static beta values and beta values estimated by an asymmetric beta model. In asymmetric model we have the possibility to estimate the upside and downside betas, while in the static model we are not able to work it out. We will estimate the static and asymmetric...

In this paper we apply CAPM model in the financial time series of the share prices of Technology-Software Sector in Athens Exchange stock market for the period January 1st of 2002 to June 30th of 2008 for the enterprises quot;Dionicquot; and quot;Coca-Colaquot;. In one stock we apply the OLS...