Prediction intervals for time series models with trend via sieve bootstrap

This paper discusses method for constructing the prediction intervals for time series model with trend using the sieve bootstrap procedure. Gasser–Müller type of kernel estimator is used for trend estimation and prediction. The boundary modification of the kernel is applied to control the edge effect and to construct the predictor of a trend.     

How protecting a suburban forest as a natural reserve effected small mammal communities

Restoration of mammal communities was studied between 1975–1984 and 2001–2009 (over ca. 30 years) in two suburban forests in central Poland: one protected as a natural reserve and one not protected. The mammal community in the legally protected forest showed more extensive changes than in the case of the nonprotected forest. In the natural reserve, the numbers of Microtus subterraneus, Apodemus agrarius, Rattus norvegicus and Mus musculus decreased while insectivores (mostly Sorex araneus), bats and Apodemus flavicollis increased in numbers. The community of small mammals in the reserve became more similar to the community from the relatively natural area – Białowieża Primeval Forest (eastern Poland). A protection supported restoration processes of tree stands and consequently started to increase the numbers of mammalian species typical of more natural habitats, as well as to reduce the numbers of synanthropic species and those connected to open areas. In the nonprotected forest, fewer species changed their abundance (M. subterraneus decreased, insectivores, bats and A. flavicollis increased). However, an increase in the percentage of bats and a decrease of M. subterraneus in mammal communities of both forests could reflect general trends in their populations noted in recent decades. The population decline of Warsaw’s urban species – A. agrarius perhaps is the best indicator of the restoration of suburban forests.     

Twice as Smart? The Importance of Managers’ Formative‐Years’ International Experience for their International Orientation and Foreign Acquisition Decisions

This study examined how top management team's (TMT) international orientation influences perceptions of environmental uncertainty and how these perceptions impact international strategic decisions, in particular regarding ownership stakes taken in foreign acquisitions. We highlighted the need for the concept of TMT international orientation to encompass executives’ formative‐years’ international experiences along with their international career experiences and nationalities. Empirical tests based on a sample of 2122 international acquisitions completed by 561 UK firms over the period 1999–2008 showed that TMT international orientation positively moderated the negative impact of cultural differences and host country risk on acquisition ownership stakes. The results underscored the importance of considering decision‐makers’ attributes due to their experiences at a young age, beyond their demographic characteristics or professional experience, in the context of international strategic choices. We also discussed some implications of one of the possible consequences of executives’ formative international experience, namely biculturalism, for international business.     

Fidelity in philanthropy: Two challenges to community foundations

Two recent court cases have raised doubts about how faithful community foundation officials must remain over time to the donor's charitable intent. For trustees of community foundations, nonprofit managers, and potential donors, the two cases discussed in this article raise three critical questions: Under what conditions can and should a donor's charitable intentions be modified? Do nonprofit organizations have legitimate claims to funds in community foundations earmarked for their organizations by donors? Should donors consider disbursing their philanthropic funds themselves rather than seek to have them held in perpetuity in a foundation? In addition to addressing these questions, the author suggests that the two court cases examined here reveal something important about the broader evolution of philanthropy over the past three decades.     

Debating,obfuscating and disciplining the Holocaust: post-Soviet historical discourses on the OUN–UPA and other nationalist movements

After the dissolution of the Soviet Union the archives of the former republics and satellite states of this multiethnic empire were opened. This allowed historians to investigate the history of nationalist and radical right organisations and armies that, during the Second World War, had been involved in the Holocaust and other atrocities. Among them was the Organisation of Ukrainian Nationalists. For a long time the history of these movements was unknown or distorted by Soviet propaganda and propagandist publications written during the Cold War by veterans of these movements living in the West and cooperating with Western intelligence services. The dissolution of the Soviet Union was simultaneously accompanied by the “rebirth” of nationalism that was not free from antisemitism and racism, and which triggered different types of nationalist distortions of history and obfuscations of the Holocaust. Post-Soviet historical discourses were shaped not only by journalists or political activists, but also by radical right historians. These discourses impacted as well on historians who in general were critical of the post-Soviet rehabilitation of nationalism, war criminality or East Central European fascism. Concentrating on Ukrainian and Polish history, this article explores how the radical right historical discourses appeared in the post-Soviet space, what types of historians were involved in them and what kinds of distortions and obfuscations have predominated.     

Investing with Prejudice: the Relationship Between Women's Presence on Company Boards and Objective and Subjective Measures of Company Performance

This paper presents a comprehensive archival examination of FTSE 100 companies in the period 2001–2005, focusing on the relationship between the presence of women on company boards and both accountancy‐based and stock‐based measures of company performance. Consistent with work by Adams, Gupta and Leeth this analysis reveals that there was no relationship between women's presence on boards and ‘objective’ accountancy‐based measures of performance (return on assets, return on equity). However, consistent with ‘glass cliff’ research there was a negative relationship between women's presence on boards and ‘subjective’ stock‐based measures of performance. Companies with male‐only boards enjoyed a valuation premium of 37% relative to firms with a woman on their board. Results support claims that women are found on the boards of companies that are perceived to be performing poorly and that their presence on boards can lead to the devaluation of companies by investors. Yet the findings also indicate that perceptions and investment are not aligned with the underlying realities of company performance.     

Smaller universal targets for homomorphisms of edge-colored graphs

Journal of Combinatorial Optimization - For a graph G, the density of G, denoted D(G), is the maximum ratio of the number of edges to the number of vertices ranging over all subgraphs of G. For a...