On characterizing discrete distributions via conditional expectations of weak record values

Let (W _n ,n ≥ 0) denote the sequence of weak records from a distribution with support S = { α₀,α₁,...,α _N }. In this paper, we consider regression functions of the form ψ _n (x) = E(h(W _n ) |W _n+1 = x), where h(·) is some strictly increasing function. We show that a single function ψ _n (·) determines F uniquely up to F(α₀). Then we derive an inversion formula which enables us to obtain F from knowledge of ψ _n (·), ψ _n-1(·), h(·) and F(α₀).     

Monitoring the cross-covariances of a multivariate time series

In this paper sequential procedures are proposed for jointly monitoring all elements of the covariance matrix at lag 0 of a multivariate time series. All control charts are based on exponential smoothing. As a measure of the distance between the target values and the actual values the Mahalanobis distance is used. It is distinguished between residual control schemes and modified control schemes. Several properties of these charts are proved assuming the target process to be a stationary Gaussian process. Within an extensive Monte Carlo study all procedures are compared with each other. As a measure of the performance of a control chart the average run length is used. An empirical example about Eastern European stock markets illustrates how the autocovariance and the cross-covariance structure of financial assets can be monitored by these methods.     

Transitions: Taking complexity seriously

The aim of this paper is to make the case for a systematic engagement of transition studies with complexity theory and research. We argue that transition research is important for the understanding and development of possible sustainable future pathways. However, there are several controversies in transition research, including, the role of agency in transitions; the relationships between levels (niche, regime and landscapes); the origin of transitions; the identification of a transition, including starting and ending point of transition processes; and the paradox of replicability and scaling up of independent experiments. We argue that transition research, and future studies can benefit from taking complexity theory seriously. In the paper, we elaborate four insights from complexity studies that can move the research agenda of transition studies forward: empirically investigating the degree of complexity of a system; investigating complexity at the level of the policy-making system; longitudinal and retrospective research designs for the identification of transitions; methodological tools which accommodate complexity, such as agent-based modeling and ARIMA modeling. Further, we suggest how these can improve our knowledge of transitions towards sustainable future.     

Relations for product moments and covariances of <Emphasis Type="Italic">k</Emphasis>th records from discrete distributions

The aim of this paper is to establish recurrence relations satisfied by product moments and covariances of kth records arising from discrete distributions. They will be evaluated for geometric underlying distribution. Then we use these results to obtain formulas for correlation coefficients of geometric kth records. We consider all three known types of kth records: strong, ordinary, and weak.     

A double-edged sword? The moderating effects of control on firm capabilities and institutional distance in explaining foreign affiliate performance

By drawing from the internalisation and institutional theories, as well as the organisational capability perspective, the paper analyses the moderating effects of parent control over foreign affiliates in relation to firm capabilities and institutional distance and their performance effects. These relationships are explored in the context of new MNEs from Poland as a mid-range emerging economy, for which ownership choices constitute critical decisions given their early stage of internationalisation. Our findings show that while firm capabilities drive foreign affiliate performance, the increase of parent control limits this beneficial effect, suggesting the potential occurrence of organisational inertia and reduction of learning in foreign markets. On the contrary, we also find partial evidence that the increase of parent control reduces the negative effect of institutional distance computed based on the Mahalanobis formula. Accordingly, the study suggests a certain ambiguity of parent control in affecting affiliate performance.     

Accumulative vs. Appreciative Expressions of Materialism: Revising Materialism in Light of Polish Simplifiers and New Materialism

Journal of Business Ethics - At a time when it is critically important to preserve natural resources and reduce the amount of man-made pollution, this article explores other potentials for...     

Causal relations between nominal exchange rates and monetary fundamentals in Central and Eastern European countries

The purpose of this paper is to investigate the causal relations between nominal exchange rates and monetary fundamentals. The analysis is conducted using panel quarterly data from the period 2001–12 for Central and Eastern European countries (including Turkey) with relatively flexible exchange rate regimes. The paper reconnects the empirical literature on exchange rates in Central and Eastern European countries with the most recent findings on exchange rate determination in advanced economies. Kóyna's approach, which accounts for linkages between countries, is used in the study. The main findings indicate the existence of causal relations running from both nominal exchange rates to monetary fundamentals and in the opposite direction as well as the existence of a relatively strong link between exchange rates and differentials in the relative price of non‐tradables.     

An evolutionary model of energy transitions with interactive innovation-selection dynamics

We develop a stylized application of a new evolutionary model to study an energy transition in electricity production. The framework describes a population of boundedly rational electricity producers who decide each period on the allocation of profits among different energy technologies. They tend to invest in below-average cost energy technologies, while also devoting a small fraction of profits to alternative technological options and research on recombinant innovation. Energy technologies are characterized by costs falling with cumulative investments. Without the latter, new technologies have no chance to become cost competitive. We study the conditions under which a new energy technology emerges and technologies coexist. In addition, we determine which investment heuristics are optimal in the sense of minimizing the total cost of electricity production. This is motivated by the idea that, while diversity contributes to system adaptability (innovation) and resilience to unforeseen contingencies (keeping options open), a high cost will discourage investments in it.     

Risk Diversification on the Polish Capital Market

The basics of portfolio management theory and methods of efficient selection of assets and their financing have been created by Markowitz and Sharpe. They propose that risk diversification consists, generally speaking, of the increase in the number of securities in a portfolio. So, authors try to answer the question of how many securities have to be bought on a given market to assure a well-diversified portfolio, where the increase in the number of securities does not lead to a significant decrease in portfolio risk. To evaluate such a purpose on the Polish capital market, 20 companies were surveyed that are included in the WIG20 index in the period January 2–October 10, 2001. The returns were estimated on a weekly basis. The research shows that a portfolio of securities constructed, according to the Sharpe Model, has a wide application to the Polish capital market.*University of Szczecin—Poland. This paper was presented at the Fifty-Eighth InternationalAtlantic Economic Conference, October 6Y9, 2005, Chicago, U.S.A.