Among the elements that are used to make the economical-financial analysis of a firm, we can mention ratios, which offer a wide range of possibilities to determine the situation of the company in a particular moment, as well as its evolution in time, and its position com-pared with other firms....

The objective of the present work is to analyse Internet-based Company customer satisfaction with the purpose of incorporating a measurement of this intangible asset to the value of the company. This analysis begins with the relation of attributes of greater presence or importance in the...

In the paper it is shown how fuzzy set theory can be used for modeling imprecision and subjectiveness of the problems with a finite number of decision alternatives evaluated with respect to multiple criteria or attributes. The imprecision and subjectiveness appear especially when the decision...

Stochastic volatility models for option pricing are suitable to explain many empirical stylized facts in financial markets. Among the other models, Heston provides a good analytical tractability because a quasi closed formula for the price of a European call option can be derived. The estimation...