Ecological systems (ecosystems, for short) are complex systems of interacting species, plants and animals, where each of the species consists of individual organisms that interact with organisms of the same or other species in various ways: they compete for scare resources and they are involved...

Gegenstand dieses Artikels ist die Berechnung einer Translog-Produktionsfunktion für Gesamtdeutschland, die mit der endogenen Wachstumstheorie theoretisch fundiert wird. Die räumlich-ökonometrische Schätzung zeigt, dass die einbezogenen Produktionsfaktoren einen signifikanten positiven...

Mit der fortschreitenden Ausrichtung der Regionalpolitik auf innovative Netzwerke gewinnt die Abgrenzung von Innovationsregionen - Regionen, die die Informationsverflechtungen im Raum widerspiegeln - an Bedeutung. Die räumlich-ökonometrische Schätzung einer aus der endogenen Wachstumstheorie...

Der wirtschaftliche Entwicklungsstand von Regionen hängt nicht nur von ihrer eigenen Leistungsfähigkeit ab, sondern aufgrund räumlicher Überschwappeffekte auch von jener angrenzender Wirtschaftsräume. Positive Spillovers (Lieferverflechtungen, Nutzung der Infrastruktur in Nachbarregionen u....

Convergence of EU regions is an often examined research question. However, there are no studies available which include in their analysis the New Member States from the former Eastern Bloc. We estimate several models of absolute convergence and of conditional convergence taking into account the...

The convergence of German regions represents a politically explosive question. Different studies examined convergence processes of Germany. We derive equations to estimate the convergence speed on basis of a Solow model, to which human capital is added. The geographically weighted regression...

The basic model of the literature on self-enforcing international environmental agreements is a model of autarkic countries. We extend that model by international trade and investigate its impact on the performance of Nash coalitions and on their stability, in particular, in a general...

In the basic model of the literature on international environmental agreements (IEAs) (Barrett 1994; Rubio and Ulph 2006) the number of signatories of selfenforcing IEAs does not exceed three, if non-positive emissions are ruled out. We extend that model by introducing a composite consumer good and...

In the basic model of international environmental agreements (IEAs) (Barrett 1994, Rubio and Ulph 2006) extended by international trade, self-enforcing - or stable - IEAs may comprise up to 60 % of all countries (Eichner and Pethig 2013). But these IEAs reduce total emissions only slightly...

This paper studies the formation of self-enforcing global environmental agreements in a world economy with international trade and two groups of countries that differ with respect to fuel demand and environmental damage. It investigates whether the signatories' threat to embargo (potential) free...