In this paper we present a new approach to integration and cointegration. We show that a periodically correlated time series can be divided in a natural way into subseries that are integrated. Moreover, with high probability they are cointegrated. Therefore it is enough to show periodic...

The dominant role of corporations in modern economy and observed widespread oligopolization are the sources of practical need for the theoretical concept of the enterprise explaining the operations of large companies, with a particular focus on their primary objectives and aims, and the role...

Celem artykulu jest analiza pozycji konkurencyjnej najwiekszych przedsiebiorstw branzy budowlanej z wojewodztwa podlaskiego, na tle sektora w latach 2010 - 2012. Do analizy wykorzystany zostal tzw. Radar Nagashimy, pozwalajacy okreslic w sposob syntetyczny wzgledne ksztaltowanie sie wybranego...

The dominant role of corporations in modern economy and observed widespread oligopolization are the sources of practical need for the theoretical concept of the enterprise explaining the operations of large companies, with a particular focus on their primary objectives and aims, and the role...

Ce papier s'appuie sur des observations faites à plusieurs années d'intervalle dans un établissement de la RATP où une règle salariale a été introduite. Dans une première partie, nous montrons que la question pertinente n'est pas de savoir si la règle est suivie, mais comment les...