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Societe Generale opened its first office in the United States in 1938 and in Canada in 1974. Today, it is one of the largest foreign banking organizations in North America, with approximately 2,500 professionals working in eight US cities, in three cities in Canada and in Mexico City.
The following Societe Generale divisions operate in the United States and Canada to provide investor, corporate and government clients with financial solutions.
- Corporate & Investment Banking : Securities, derivatives brokerage, investment banking, asset management, advisory services, execution and prime brokerage through the Societe Generale Branch, SG Americas Securities and Lyxor.
- Specialized Financial Services : Equipment finance services through SG Equipment Finance USA Corp.
Industry : Corporate & Investment Banking (CIB) and Financial Services
Founded : 1974
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Categorical variable selection in risk modelling
In financial institutions, categorical features appear quite often in credit datasets and in compliance models, for example, features related to clients’ risk profile.
Traditional feature selection methods (e.g. statistical significance, recursive feature elimination, LASSO) do not work well with categorical features since these methods would retain certain levels and remove other levels of the same feature. The Group Lasso approach has shown to be more stable in terms of variable selection but displays shortcoming in terms of predictability. Instead, for a given feature, would it be more appropriate to devise a method that aggregates neighbouring levels in bins in order to get a feature representation space that would better scale with the output?
Because of the numerous ways to represent categorical variables and to select which variables are of importance we ask what are the most appropriate methods for improving categorical feature selection?
Full Professor – Department of Mathematics and Statistics, University of Montreal.
Adrian Gonzalez Sanchez
Lecturer, HEC Montréal and Concordia University.
Model Validation Manager VP, Société Générale.
Quantitative Advisor, Société Générale.
Partnership Advisor, IVADO.