Nils Karl Sørensen

Seasonality in Macroeconomic Time Series

Recently, the seasonal characteristics of macroeconomic time series have drawn a lot of attention. It has been argued that the seasonal component of many macroeconomic time series constitutes a major part of the series measured as a proportion of the variance. In addition it has been found that the seasonal component of most macroeconomic time series is constant and best “explained” by seasonal dummies. Specifically it is often found that a Christmas boom is followed by a beginning of the year trough.Based on quarterly and monthly macroeconomic time series from a large number of countries this paper shows that many macroeconomic time series have seasonal components that are changing over time. Furthermore, the Christmas boom and especially the 1st quarter trough is not found nearly as often as one might expect.

Cross-border innovation cooperation: Partner selection, national borders and knowledge bases

Today we can observe an increasing spatial divide as some large urban regions and many more medium-sized and small regions face growing problems such as decreasing labour demand, increasing unemployment and an ageing population. In view of these trends, this book offers a better understanding of the general characteristics and specific drivers of the geographies of growth. It shows how these may vary in different spatial contexts, how hurdles and barriers to growth in different types of regions can be dealt with, how and to what extent resources in different areas can develop, and how the potential of these resources to stimulate growth can be realized.