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Research + Study

Helsinki GSE organizes itself through research groups. Each research group is responsible for promoting and developing cooperation within the Helsinki GSE community in its research area.

Helsinki GSE Master’s programs offer a wide selection of courses covering all the main fields of economics. Our courses enable our students to learn the essential core of economics at an advanced level, while providing them with the possibility to tailor their education according to their specific interests.

Helsinki GSE students can take courses from each of the three departments. The listing below represents our current course offering covering all the Helsinki GSE universities.


November 12, 2019

Doctoral Defence: “Essays on noninvertible ARMA models”

On November 15th. MSSc. Juho Nyholm will defend his doctoral thesis “Essays on noninvertible ARMA models”. His thesis contributes to the time series econometric literature by expanding novel theoretical results in ARMA modeling under noninvertibility and non-Gaussianity. Nyholm shows how assuming noninvertibility in classical ARMA models allows for modelling more complex and nonlinear patterns in financial time series than conventional causal and invertible ARMA models. In particular, unlike their invertible counterparts, these models are capable of controlling for heteroscedasticity, which is for example, often encountered in stock market returns. In his thesis, Nyholm constructs methods for testing the adequacy of an estimated noninvertible ARMA model. He also provides asymptotic estimation theory for the parameters of the noninvertible ARMA model designed for time series data that exhibits extreme jumps. Nyholm illustrates the applicability of the noninvertible ARMA model by showing how…

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