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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...
Persistent link: https://www.econbiz.de/10010294812
In this paper we survey the most recent advances in supervised machine learning and highdimensional models for time series forecasting. We consider both linear and nonlinear alternatives. Among the linear methods we pay special attention to penalized regressions and ensemble of models. The...
Persistent link: https://www.econbiz.de/10012817069
Educational systems can be characterized by a complex structure: students, classes and teachers, schools and principals, and providers of education. The added value of schools is likely influenced by all these levels and, especially, by interactions between them. We illustrate the ability of...
Persistent link: https://www.econbiz.de/10012028730
This paper proposes a comprehensive, path-independent decomposition formula of changes into ceteris paribus effects and interaction effects. The formula implies a reassessment of sequential decomposition methods that are widely used in the literature and that are restrictive in how they treat...
Persistent link: https://www.econbiz.de/10010287675
Using a novel large-scale dataset that links thousands of expenditure programs to the Sustainable Development Goals for over a decade, we analyze the impact of public expenditure on more than 100 different development indicators. Contrary to the single-dimensional view of evaluating expenditure...
Persistent link: https://www.econbiz.de/10014558535
, leistet das Working Paper einen Beitrag zur Theorie der Regionalen Führungsmächte aus wirtschaftswissenschaftlicher … im Folgenden durch beschreibende Statistik und Regressionsanalyse an den Beispielländern Brasilien, China, Indien und …
Persistent link: https://www.econbiz.de/10010276003
This paper considers nonparametric identification and estimation of the regression function when a covariate is mismeasured. The measurement error need not be classical. Employing the small measurement error approximation, we establish nonparametric identification under weak and...
Persistent link: https://www.econbiz.de/10014581847
small depending on the shape of the copula of child and parent incomes. Second, we derive a general asymptotic theory for … asymptotic theory to other regressions involving ranks that have been used in empirical work. Finally, we apply our new inference …
Persistent link: https://www.econbiz.de/10014480485
This paper proposes a powerful alternative to the t-test of the null hypothesis that a coefficient in linear regression is equal to zero when a regressor is mismeasured. We assume there are two contaminated measurements of the regressor of interest. We allow the two measurement errors to be...
Persistent link: https://www.econbiz.de/10014480598
The aim of this study is to analyse how research and innovation activities, funded by the Nanosciences and Nanotechnologies, Materials, New Production Technologies (NMP) and the Industrial Biotechnology (B) themes in the Seventh Framework Programme for Research (FP7) (together: FP7 NMBP), are...
Persistent link: https://www.econbiz.de/10011476945