The economic recession in the European countries during the current financial crisis and the worsening of the financial situation in a number of countries have resulted in an increase of the sovereign debt risk. In this paper we use the method of self-organizing maps to propose a European...

Finance and financial markets were at the heart of the global economic crisis that began in August 2007. 2010 has seen the transformation of the global financial crisis into a sovereign debt crisis in the Eurozone. Starting from Greece, the debt crisis has put intense pressure on the bonds of...

2007 Ağustos ayında başlayan küresel ekonomik krizin odak noktası, finans ve finansal piyasalardır. 2010 yılında ise, küresel finansal kriz, Avro Bölgesinde devlet borç krizine dönüşmüştür. Yunanistan’dan başlayarak, borç krizi diğer Avro Bölgesi ülkelerinin (özellikle...

In this paper the relatively new technique of neural nets is integrated in a traditional model of portfolio choice. On the basis of Arrow’s State Preference Model the investment decision depends on the expectation building process which consists of two components. The individual information...

We explore convenient analytic properties of distributions constructed as mixtures of scaled and shifted t-distributions. A feature that makes this family particularly desirable for econometric applications is that it possesses closed-form expressions for its anti-derivatives (e.g., the...

Commonly used classification and regression tree methods like the CART algorithm are recursive partitioning methods that build the model in a forward stepwise search. Although this approach is known to be an efficient heuristic, the results of recursive tree methods are only locally optimal, as...

The literature on electoral cycles has developed in two distinct phases. The first one considered the existence of non-rational (naive) voters whereas the second one considered fully rational voters. In our perspective, an intermediate approach is more interesting, i.e. one that considers...

This paper proposes a rating methodology that is based on a non-linear classification method, the support vector machine, and a non-parametric technique for mapping rating scores into probabilities of default. We give an introduction to underlying statistical models and represent the results of...

This paper discusses a tool for optimization of econometric models based on genetic algorithms. First, we briefly describe the concept of this optimization technique. Then, we explain the design of a specifically developed algorithm and apply it to a difficult econometric problem, the...

Many economic and econometric applications require the integration of functions lacking a closed form antiderivative, which is therefore a task that can only be solved by numerical methods. We propose a new family of probability densities that can be used as substitutes and have the property of...