The visualization of analytically de ned dynamical systems is important for a thorough understanding of the underlying system behavior. An introduction to analytically de ned dynamical systems is given. Various visualization techniques for dynamical systems are discussed. Several current research directions concerning the visualization of dynamical systems are treated in more detail. These are:...

Business surveys are an important element in the analysis of the short-term economic situation because of the timeliness and nature of the information they convey. Especially, surveys are often involved in econometric models in order to provide an early assessment of the current state of the economy, which is of great interest for policy-makers. In this paper, we focus on non-seasonally adjuste...

The modeling and computation of patent citations data provides an exciting opportunity to examine the links among inventions and inventors, over time, space, technology, and institutions. So far, a number of scientometric and econometric models, which deal with number of patents and use count data model, are introduced to analyze the relationship among that number of patents (research output) a...

This paper examines the combined influences of detrending and time aggregation on the measurement of business cycles. The approximate band-pass filter of Baxter and King (1999) performs relatively well in the sense that it retains the basic shape of disaggregate spectra and cospectra when applied to time aggregated data and is straightforward to apply across sampling intervals. Analysis of know...

This paper examines the impact of fiscal incentives on the level of R&D investment. An econometric model of R&D investment is estimated using a new panel of data on tax changes and R&D spending in nine OECD countries over a 19-year period (1979–1997). We find evidence that tax incentives are effective in increasing R&D intensity. This is true even after allowing for permanent country-specific c...

Confidence in macro-economic forecasting has periodically been punctured by episodes of economic turbulence and concomitant predictive failure. The poor performance in predicting the consumer boom in the late 1980’s, and the depth and duration of the recession in the 1990’s, can be viewed as merely the latest examples in a catalogue of failures, with noteworthy antecedents including the under-p...

ONE OF THE most important advances in monetary policy analysis in the past three decades has been the development and use of economy-wide econometric models that combine forward-looking rational expectations and sticky prices or wages. Such models are so commonplace now that the idea hardly deserves comment and indeed the structural models presented at this conference are no exception. But no s...

This article studies whether export supporting activities developed by Portuguese diplomatic representations in the last decade have had any impact on Portugal’s international trade. It used data for 187 destination countries, period of 2008 to 2017, controlling other determinants trade through a gravity model. Complementing econometric analysis macro data, survey was applied 238 exporting firm...