Parametric seemingly unrelated regression (SUR) models are a common tool for multivariate regression analysis when error variables are reasonably correlated, so that separate univariate analysis may result in inefficient estimates of covariate effects. A weakness of parametric models is that they require strong assumptions on the functional form of possibly nonlinear effects of metrical covaria...

Abstract Clusterwise regression is an approach to analysis based on finite mixtures which generally employed when sample observations come from a population composed of several unknown sub-populations. Whenever the response continuous, Gaussian clusterwise linear models are usually employed. Such have been recently robustified with respect possible presence mild outliers in However, some fields...

Abstract This research develops an expanded unified growth theory that incorporates the endogenous accumulation of physical capital, population, human and technology. The model a complementarity between capital can be extended to multi-country setting with international technology diffusion. analytical characterization mechanisms behind observed patterns long-run comparative development deliver...

Grouping structures arise naturally in many statistical modeling problems. Several methods have been proposed for variable selection that respect grouping structure in variables. Examples include the group LASSO and several concave group selection methods. In this article, we give a selective review of group selection concerning methodological developments, theoretical properties and computatio...

Hysteresis effect on unemployment is a much discussed topic in macroeconomics. However, empirical findings regarding the existence of hysteresis effect are contradictory. The present study investigates hysteresis in the unemployment rates of the Visegrad Group countries, namely: the Czech Republic, Hungary, Poland and Slovakia. For this purpose it employs the following three econometric methods...

Various authors have proposed using the jackknife technique to approximate a standard error for the Gini coefficient. It has also been shown that the Gini measure can be obtained simply from an artificial OLS regression based on the data and their ranks. Accordingly, we show that obtaining an exact analytical expression for the standard error is a trivial matter. In addition, by extending the r...

According to the classical Ricardian theory of comparative advantage, relative labor productivities determine trade patterns. The Ricardian model plays an important pedagogical role in international economics, but has received scant empirical attention since the 1960s. This paper assesses the contemporary relevance of the Ricardian model for US trade. Cross-section seemingly unrelated regressio...