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Nonlinear theory and tests of earthquake recurrence times
(2007)arXivWe develop an efficient numerical scheme to solve accurately the set of nonlinear integral equations derived previously in (Saichev and Sornette, 2007), which describes the distribution of inter-event times in the framework of a general model of earthquake clustering with long memory. Detailed comparisons between the linear and nonlinear versions of the theory and direct synthetic catalogs show that the nonlinear theory provides an excellent ...Working Paper -
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Driving Forces for Research and Development Strategies: An Empirical Analysis Based on Firm-level Panel Data
(2007)KOF Working PapersThis paper investigates empirically different ways to organize R&D within Swiss firms. Based on a longitudinal data set comprising three cross-sections (1999, 2002, and 2005) of the Swiss innovation survey, four different types of R&D strategies were identified: firms combine in-house R&D with R&D co-operations (coop), or in-house R&D with external R&D (buy), or they conduct in-house R&D, external R&D and R&D co-operations (mixed), or ...Working Paper -
Ermittlung repräsentativer Betriebskostensätze für Motorfahrzeuge zur Bewertung von Massnahmen im Strassenverkehr
(2007)SchriftenreiheMassnahmen im Strassenverkehr werden hinsichtlich ihrer Auswirkungen auf Ökologie, Wirtschaft und Gesellschaft bewertet. Für die Bewertung von Massnahmen bestehen Bewertungsverfahren, wie zum Beispiel NISTRA oder zur Durchführung der Kosten-Nutzen-Analyse die SN 641 820. Ein dabei untersuchtes Ziel ist die massnahmenbedingte Veränderung der Kraftfahrzeugbetriebskosten. Aufgabe dieser Untersuchung ist es, repräsentative Kostensätze zur ...Report -
News and Sectoral Comovement
(2007)KOF Working PapersThis paper tests the existence of strategic information complementarities as a source of sectoral comovement. A theoretical model derived in Veldkamp and Wolfers (2007) explains sectoral comovement by the assumption that firms rely too much on aggregate information to make output decisions. We find empirical support for this hypothesis: news on aggregate developments, on average, affect firm’s production plans significantly more than news ...Working Paper -
Quality control of CarboEurope flux data - Part I: Footprint analyses to evaluate sites in forest ecosystems
(2007)Biogeosciences DiscussionsWe applied a site evaluation approach combining Lagrangian Stochastic footprint modelling with a quality assessment approach for eddy-covariance data to 25 forested sites of the CarboEurope-IP network. The analysis addresses the spatial representativeness of the flux measurements, instrumental effects on data quality, spatial patterns in the data quality, and the performance of the coordinate rotation method. Our findings demonstrate that ...Working Paper -
Quality control of CarboEurope flux data - Part II: Inter-comparison of eddy-covariance software
(2007)Biogeosciences DiscussionsAs part of the quality assurance and quality control activities within the CarboEurope-IP network, a comparison of eddy-covariance software was conducted. For four five-day datasets, CO2 flux estimates were calculated by seven commonly used software packages to assess the uncertainty of CO2 flux estimates due to differences in post-processing. The datasets originated from different sites representing different commonly applied instrumentation ...Working Paper -
How is real convergence driving nominal convergence in the new EU Member States?
(2007)Working Paper SeriesWorking Paper -
Analyse einer direkten Busverbindung Stadtzentrum - Science City
(2007)In dieser Arbeit wurden für verschiedene Korridore für die Verbindung von Science City mit der Zürcher Stadtzentrum Erschliessungsachsen definiert, welche mit einem geeigneten Bewertungsschema aus Sicht mehrerer Nutzergruppen sowie finanzieller Aspekte bewertet wurden. Es zeigte sich, dass die Verbesserung des bestehenden Angebots die beste (weil günstigste Lösung ist). Stellt man aber geringe Beträge finanzieller Mittel zur Verfügung, ...Report -
Habit formation, dynastic altruism, and population dynamics
(2007)Economics Working Paper SeriesWe study the general equilibrium properties of two growth models with overlapping generations, habit formation and endogenous fertility. In the neoclassical model, habits modify the economy's growth rate and generate transitional dynamics in fertility; stationary income per capita is associated with either increasing or decreasing population and output, depending on the strength of habits. In the AK specification, growing population and ...Working Paper