On the determination of sizes of markets

The number of specialized dealers is of interest to market research institutes. They need those market sizes to project sample results to the whole population of shops. A basis to get to know the size of such a population is given by address registers. These registers contain also dead addresses and they are incorrect as they do not contain all addresses of existing shops. We present an approach to deal with these two kinds of errors and derive an estimator with negligible bias.     

Measuring serial dependence in categorical time series

The analysis of time-indexed categorical data is important in many fields, e.g., in telecommunication network monitoring, manufacturing process control, ecology, etc. Primary interest is in detecting and measuring serial associations and dependencies in such data. For cardinal time series analysis, autocorrelation is a convenient and informative measure of serial association. Yet, for categorical time series analysis an analogous convenient measure and corresponding concepts of weak stationarity have not been provided. For two categorical variables, several ways of measuring association have been suggested. This paper reviews such measures and investigates their properties in a serial context. We discuss concepts of weak stationarity of a categorical time series, in particular of stationarity in association measures. Serial association and weak stationarity are studied in the class of discrete ARMA processes introduced by Jacobs and Lewis (J. Time Ser. Anal. 4(1):19–36, 1983). An intrinsic feature of a time series is that, typically, adjacent observations are dependent. The nature of this dependence among observations of a time series is of considerable practical interest. Time series analysis is concerned with techniques for the analysis of this dependence. (Box et al. 1994p. 1)     

Designs for first-order interactions in paired comparison experiments with two-level factors

For paired comparison experiments involving options described by a common set of two-level factors a new method for generating exact designs is presented. These designs allow the efficient estimation of main effects and first-order interactions and perform better than alternative designs available in the literature.     

Demands of Social Change as a Function of the Political Context,Institutional Filters,and Psychosocial Resources

Individually experienced demands of current social change in the domains of work and family were assessed in a large sample of adults from two Western and two Eastern federal states of Germany. For each domain of life, a cumulated index was computed representing the load with highly endorsed demands and this was compared across political regions, employment, partnership status and participants’ level of education. Generally, a higher load of demands was found in Eastern Germany for participants who were unemployed or outside the labor market, those who were separated or divorced, and those with lower education. The political context and education aggravated the load of demands in the domain of work (but not in the domain of family) as indicated by significant two-way interactions between the different factors. The results prove that the demands of social change due to globalization or individualization differ in a systematic way across ecological niches.     

Auswirkungen der deutschen Unternehmensteuerreform 2008 und der österreichischen Gruppenbesteuerung auf den grenzüberschreitenden Unternehmenserwerb

Using a simple model under certainty we show the implications of the new group relief system in Austria effective from 2005 and the reform act of business taxation 2008 in Germany on cross border marginal purchase prices and marginal seller prices concerning incorporations. The results show that the new group relief in Austria does not imply a higher marginal purchase price for a subsidiary located in Austria by an Austrian investor in comparison to his German competitor. If the German reform act of business taxation 2008 is not taken into account a German investor is able to pay higher marginal prices at the Austrian and German transaction market for companies. Considering the German tax reform act the situation changes. Now the Austrian investor is able to pay higher marginal prices for subsidiaries located in Germany and Austria.     

How Is Power Shared in Africa?

Is African politics characterized by concentrated power in the hands of a narrow group (ethnically determined) that then fluctuates from one extreme to another via frequent coups? Employing data on the ethnicity of cabinet ministers since independence, we show that African ruling coalitions are surprisingly large and that political power is allocated proportionally to population shares across ethnic groups. This holds true even restricting the analysis to the subsample of the most powerful ministerial posts. We argue that the likelihood of revolutions from outsiders and coup threats from insiders are major forces explaining allocations within these regimes. Alternative allocation mechanisms are explored. Counterfactual experiments that shed light on the role of Western policies in affecting African national coalitions and leadership group premia are performed.     

Towards a Political Theory of Migrant Transnationalism

Political transnationalism covers a wide range of phenomena and can be studied using a variety of approaches. In migration research the focus is mostly on migrants' networks and activities that involve them in politics oriented towards their country of origin. The article argues for a wider conception of political transnationalism from a political theory perspective. It proposes a terminological distinction between international, multinational, supranational and transnational relations and phenomena. What is specific about migrant transnationalism is that it creates overlapping memberships between territorially separated and independent polities. In this understanding, political transnationalism is not only about a narrowly conceived set of activities through which migrants become involved in the domestic politics of their home countries; it also affects collective identities and conceptions of citizenship among the native populations in both receiving and sending societies. Within this general framework the article suggests a set of hypotheses for an explanatory and normative analysis of sending country relations to their emigrants, a task that has hitherto been neglected in political theory.     

Archival or perceived measures of environmental uncertainty? Conceptualization and new empirical evidence

Environmental uncertainty is a major determinant in many managerial decisions and evaluations. Yet, there is no consensus what constitutes a valid measure of uncertainty to which executives can respond. This paper explicates conceptual and methodological differences between Archival Environmental Uncertainty (AEU) and Perceived Environmental Uncertainty (PEU).