2011
DOI: 10.1016/j.eswa.2011.04.136
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Unsupervised neural models for country and political risk analysis

Abstract: Abstract. This interdisciplinary research project focuses on relevant applications of Knowledge Discovery and Artificial Neural Networks in order to identify and analyse levels of country, business and political risk. Its main goal is to help business decision-makers understand the dynamics within the emerging market countries in which they operate. Most of the neural models applied in this study are defined within the framework of unsupervised learning. They are based on Exploratory Projection Pursuit, Topolo… Show more

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Cited by 20 publications
(14 citation statements)
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“…The solution proposed in this research applies an unsupervised neural model called Cooperative Maximum Likelihood Hebbian Learning (CMLHL) [4]. It is based on Maximum Likelihood Hebbian Learning (MLHL) [4], and introduces the application of lateral connections [4] derived from the Rectified Gaussian Distribution [9]. This connectionist model has been chosen because it reduces the data dimensionality while preserving the topology in the original data set.…”
Section: Neural Visualizationmentioning
confidence: 99%
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“…The solution proposed in this research applies an unsupervised neural model called Cooperative Maximum Likelihood Hebbian Learning (CMLHL) [4]. It is based on Maximum Likelihood Hebbian Learning (MLHL) [4], and introduces the application of lateral connections [4] derived from the Rectified Gaussian Distribution [9]. This connectionist model has been chosen because it reduces the data dimensionality while preserving the topology in the original data set.…”
Section: Neural Visualizationmentioning
confidence: 99%
“…where: η is the learning rate, τ is the "strength" of the lateral connections, b the bias parameter, p a parameter related to the energy function and A a symmetric matrix used to modify the response to the data [4]. The effect of this matrix is based on the relation between the distances separating the output neurons.…”
Section: Neural Visualizationmentioning
confidence: 99%
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“…The SOM is considered to be a feasible tool for aggregating multiple related variables to visualize and monitor the evolution of economic conditions over time. However, Herrero et al [11] argued that SOM results were inconsistent and inferior compared to other techniques such as PCA when they were applied to assess and project the political risk for nations. Hence, in this study we suggest using a FFBNN model to forecast the KBE indicators, and to combine the forecasted results using PCA and SOM.…”
Section: Related Workmentioning
confidence: 99%
“…Hadavandi et al [12] proposed the use of Stepwise Regression to select key factors in their genetic fuzzy and ANN forecasting model. Herrero et al [11] used three different methods, including Cooperative Maximum-Likelihood Hebbian Learning, PCA, SOM and Curveilinear Component Analysis (CCA) to select the most appropriate variables to forecast the political risk for most of the world's nations.…”
Section: A Indicators Selections and Preparations (Stage 1)mentioning
confidence: 99%