The Board of Directors in Greek Football Clubs: 2005-2014

Boards pf Directors of the Greek Syper Leagu

Rapid demand curves: Reward valuation using behavioral economics

Within the past few decades, the psychological field of operant behaviorism has converged with the field of economics to aid in the description and interpretation of behavior. In doing so, more stringent, empirical methods of measuring and analyzing behavior have been produced. Laboratory experiments with both human and non-human animals have been used to study concepts that are integral to both fields, such as supply and demand, scarcity, and choice behavior. One goal of behavioral-economic research is to establish a demand function; that is, how does a change in the price of a commodity influence changes in its consumption? Consequently, what other factors influence consumption beyond changes in price alone? The current study aimed to replicate previous research and present further evidence for the generation of a demand function by observing the food consumption of animal subjects (pigeons) under controlled conditions. Specifically, an increasing fixed-ratio (FR) schedule of reinforcement was used over a short period of time (5 days) to rapidly measure changes in demand. Outcomes frequently related to responding in behavioral experiments (i.e., interresponse-times, post-reinforcement pauses, and shifts in weight) were also measured. A repeated measures ANOVA evidenced significant decreases in consumption as price increased. Behavioral economic formulae provided moderate to strong model fits for demand data (average R2 = 0.83), suggesting that demand behavior is able to be measured under speeded conditions and across species

Το αντίστροφο πρόβλημα της εύρεσης τηςσΣύστασης δερματικού ιστού

Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Εφαρμοσμένες Μαθηματικές Επιστήμες

Decadal changes in extreme daily precipitation in Greece

International audienceThe changes in daily precipitation totals in Greece, during the 45-year period (1957?2001) are examined. The precipitation datasets concern daily totals recorded at 21 surface meteorological stations of the Hellenic National Meteorological Service, which are uniformly distributed over the Greek region. First and foremost, the application of Factor Analysis resulted in grouping the meteorological stations with similar variation in time. The main sub groups represent the northern, southern, western, eastern and central regions of Greece with common precipitation characteristics. For representative stations of the extracted sub groups we estimated the trends and the time variability for the number of days (%) exceeding 30 mm (equal to the 95% percentile of daily precipitation for eastern and western regions and equal to the 97.5% percentile for the rest of the country) and 50 mm which is the threshold for very extreme and rare events. Furthermore, the scale and shape parameters of the well fitted gamma distribution to the daily precipitation data with respect to the whole examined period and to the 10-year sub periods reveal the changes in the intensity of the precipitation