Tree-structured smooth transition regression models

Tree-structured smooth transition regression models

This paper introduces a tree-based model that combines aspects of CART (Classification and Regression Trees) and STR (Smooth Transition Regression). The model is called the Smooth Transition Regression Tree (STR-Tree). The main idea relies on specifying a parametric nonlinear model through a tree-growing procedure. The resulting model can be analyzed as a smooth transition regression with multi...

Tree Structured Interpretable Regression

Nonparametric Regression Model with Tree-structured Response

Highly developed science and technology from the last two decades motivated the study of complex data objects. In this paper, we consider the topological properties of a population of tree-structured objects. Our interest centers on modeling the relationship between a tree-structured response and other covariates. For tree objects, this poses serious challenges since most regression methods rel...

Smooth-Transition GARCH Models

The asymmetric response of conditional variances to positive versus negative news has been traditionally modeled with threshold specifications that allow only two possible regimes: low or high volatility. In this paper, the possibility of intermediate regimes is considered and modeled with the introduction of a smooth-transition mechanism in a GARCH specification. One important property of this...

Nonlinear Study of Educational Effects on Iran's Economic Growth: Approach of Smooth Transition Regression

In the new models of economic growth, the role of human capital has been emphasized as one of the pillars for growth and development. Generally, increasing the level of education and training costs will lead to an increase in human capital that will ultimately show itself in economic growth. The main objective of the research is to examine the two factors of educational level and educational ex...