The complex datasets cannot be analyzed using only simple regressions. Multilevel models (also known as hierarchical linear models, nested models, mixed models, random coefficient, random-effects models, random parameter models or split-plot designs) are statistical models of parameters that...

The objective of this paper represents the analysis of the way the Romania's economic integration in the EU will influence the regional specialization and industrial activities localization within NUTS (the eight regions of Romania) during the period 1991-2004, using absolute measures...

The present study is, in particular, an attempt to test the relationship between tax level and political stability by using some economic control variables and to see the relationship among government effectiveness, corruption, and GDP. For the purpose, we used the Vector Autoregression (VAR)...

Les ingénieurs économistes français avaient accueilli avec beaucoup de réticences l’œuvre de Walras. Ils ne pensaient pas que l’emploi des mathématiques puisse constituer une méthode normale même en économie politique pure. Progressivement leurs réticences s’estompèrent quand...

Macroeconometric models have during the last 40 years played an important role as a tool to guide decision making in public as well as private macroeconomic institutions. However, such models have not been much used in academic circles. We argue that macroeconometric models have problems both...

Some recent developments in the macroeconometric analysis of time series are discussed in the light of Haavelmo (1944). Experimental design in econometrics is discussed and related to the case of passive observation. The general ideas are illustrated with an analysis of the long-run and...

This study provides evidence on optimal commodity tax rates in Australia, and on their sensitivity to demand function and demographic specification. The optimal tax algorithm, proposed and used here, allows the social welfare weights to depend on prices, household composition and aggregate...

Le propos de cet article est une evaluation critique des methodes de rapprochement entre les faits et la theorie economique. Il s'agit, plus precisement, de questionner les methodes econometriques actuellement en vigueur relativement a l'epistemologie scientifique. Nous avons considere dans ce...

The roots of statistics are concealed far away in ancient times. Although hidden with many unknowns and uncertainties one may see bright and impressive moments even in the farthest history. In its development social statistics has left deep marks on the whole statistics and human knowledge in...

The technique of Pad\'e Approximants, introduced in a previous work, is applied to extended recent data on the distribution of variations of interest rates compiled by the Federal Reserve System in the US. It is shown that new power laws and new scaling laws emerge for any maturity not only as a...