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Restarted GMRES preconditioned by deflation
(1994)SAM Research ReportThis paper presents a new preconditioning technique for solving linear systems. It is based on an invariant subspace approximation for the restarted GMRES algorithm. It uses the flexible GMRES scheme by designing a new preconditioning after each restart. Numerical examples show that this approach may converge almost as fast as full-GMRES at a, possibly, much lower cost.Report -
Counting crime? A review on the production of crime data
(2024)CURATE Working PaperThis literature review is aimed at providing an overview of the arguments, concerns, and issues raised by criminologists, sociologists, and psychologists regarding crime data and their quality. Given the increasing, widespread use of (crime) data to serve analytical purposes (e.g., predictive policing) and global discussions and measures on big data (policing), this review presents relevant and timely insights. It assists our understanding ...Working Paper -
Trend Fundamentals and Exchange Rate Dynamics
(2015)KOF Working PapersWe estimate a multivariate unobserved components-stochastic volatility model to explain the dynamics of a panel of six exchange rates against the US Dollar. The empirical model is based on the assumption that both countries' monetary policy strategies may be well described by Taylor rules with a time-varying inflation target, a time-varying natural rate of unemployment, and interest rate smoothing. The estimates closely track major movements ...Working Paper -
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Flexibility and sector coupling in energy systems: definitions and metrics
(2023)Globally, all nations agreed to reach net-zero greenhouse gas emissions by 2050. This requires a drastic change in the energy system, including a shift towards intermittent renewable energies, the need for sector coupling, flexibility, and efficiency. Flexibility and sector coupling are two concepts widely discussed in the literature, however, a common understanding is missing. In this report, we propose definitions and quantitative metrics ...Report -
Combining disaggregate forecasts for inflation: The SNB's ARIMA model
(2013)Swiss National Bank Economic StudyThis study documents the SNB's ARIMA model based on disaggregated CPI data used to produce inflation forecasts over the short-term horizon, and evaluates its forecasting performance. Our findings suggest that the disaggregate ARIMA model for the Swiss CPI performed better than relevant benchmarks. In particular, estimating ARIMA models for individual CPI expenditure items and aggregating the forecasts from these models gives better results ...Report -
Endogenous persistence with recursive inattentiveness
(2011)KOF Working PapersThe DSGE model with endogenous and time-varying sticky information in Dräger (2010) is extended by allowing agents’ recursive choice between forecasts under rational or sticky information to affect the model solution. Dynamic equilibrium paths generate highly persistent series for output, inflation and the nominal interest rate. Agents choose predictors in a near-rational manner and we find that the share of agents with rational expectations ...Working Paper -
Inertia effects of past behavior in modal shift behavior
(2020)Arbeitsberichte Verkehrs- und RaumplanungThis paper focuses on empirically investigating the inertia effects of past behavior in modal shift behavior and contributes to the current state of the art by three aspects. Firstly, this study introduces and tests the potential influences of the inertia effect of past behavior on the traveler’s preferences regarding level-of-service (LOS) variables, besides the impacts of inertia effect on the preference for the frequently used transport ...Working Paper -
Geokodierung 6-Wochenbefragung Thurgau 2003
(2004)Arbeitsberichte Verkehrs- und RaumplanungIn der vorliegenden Arbeit wird das Vorgehen und die Erfahrungen bei der Geokodierung einer Verkehrserhebung im Kanton Thurgau beschrieben. Im Herbst und Winter 2003 wurden 99 Haushalte über 6 Wochen zu ihrem Verkehrsverhalten befragt. Jedes Haushaltsmitglied hat dazu alle unternommenen Wege festgehalten, inkl. der Wegeziele. Mit Hilfe von Datenbank-Funktionalitäten wurden dabei den in der Erhebung an-gegebenen Wegezieladressen in der ...Working Paper -
Adapting to Climate Change: Lessons for Swiss Civil Protection
(2023)CSS Risk and Resilience ReportsClimate-exacerbated hazards have left an indelible mark on Europe in recent years. Switzerland has had a national climate change adaptation strategy in place since 2012. However, it is clear from the increasing frequency, intensity, and scale of climate-exacerbated hazards in Europe that more adaptation and better cooperation across cantonal and international borders are needed. This CSS Risk and Resilience Report has the aim to complement ...Report