Long memory in volatilities of German stock returns

We show that there is strong evidence of long-range dependence in the volatilities of several German stock returns. This will be done by applying a method using the difference of the classical log-periodogram regression estimator for the memory parameter and of the tapered periodogram based estimator. Both estimators give similar values for the memory parameter for each series and this indicates long memory. To support our findings we apply also a methodology using the sample variance and a wavelet based estimator to the data. Also these two methods show clear evidence of long-range dependence in the volatilities of German stock returns.First version received: December 2001/Final version received: March 2003The computational assistance of Eleni Mitropoulou and Björn Stollenwerck as well as the helpful comments of two unknown referees are gratefully acknowledged. Research supported by Deutsche Forschungsgemeinschaft under SFB 475. Stock returns were obtained from Deutsche Finanzdatenbank (DFDB), Karlsruhe.     

Monetary Policy and Financial Markets

Monetary policy and financial markets are intrinsically linked. Central banks conduct monetary policy by influencing financial market prices. Financial market prices reflect the expectations of market participants about future economic and monetary developments. Monetary policy works primarily through expectations. Transparency and credibility render monetary policy more effective. However, they are no substitutes for action. If a credible central bank uses words with the explicit aim of substituting them for action, it will risk losing credibility. To avoid what has been described as “the dog chasing its tail” problem, central banks must exercise caution in basing their monetary policy decisions on financial market information. The information about expected future developments reflected in market prices must be continuously cross-checked against economic and monetary indicators in what amounts to a “checks and balances” approach to monetary policy.     

Improving the effectiveness of nondisclosure agreements by strengthening concept learning

Intellectual property infringements rank among the top economic crimes, even though there are mechanisms in place to prevent their occurrence. One such mechanism are nondisclosure agreements, which, however, have been reported to fail in practice. This article argues that this may be overcome by strengthening employees’ concept learning. In an experiment, we investigated whether extended nondisclosure agreements, which provide the employee with detailed explanations and examples, lead to better recognition of trade secrets as compared to a standard nondisclosure agreement or no agreement at all. It was found that the extended nondisclosure agreement indeed increased participants’ ability to judge what falls under the trade secret law, whereas the standard nondisclosure agreement showed no such effect. Furthermore, the effects of the factors ‘Involvement’, ‘Specificity’, ‘Publicity’, and ‘Purpose’ on the identification of trade secrets could be proven experimentally. Employees’ judgments of whether an information represents a trade secret seem to rely on general cognitive processes. From this follows that concept learning could be integrated into systematic approaches for protecting intellectual property.     

Education and its intergenerational transmission: country of origin-specific evidence for natives and immigrants from Switzerland

This study compares the intergenerational transmission of educational attainment across immigrant groups using the Swiss Census 2000. Determinants of educational outcome and educational mobility are examined. A child’s educational opportunity depends on its parental background. Not only the effect of parental human capital but also other determinants of child educational attainment vary depending on the child’s nationality. Overall educational upward mobility is more pronounced among second generation immigrants than among natives. Children of Turkish, Portuguese and former Yugoslavian origin appear to be most disadvantaged in the process of human capital formation.

Droht eine Immobilienpreisblase in Deutschland?

Since 2009, real estate prices in Germany have been rising rapidly after a period of stagnation during the Great Recession. This raises the question of whether the recent price increases are fundamentally driven or rather an indication of a real estate bubble in Germany. To tackle this question, we take a look at several real estate demand-side indicators. As real estate bubbles sometimes form in certain sub-segments of the real estate market only, the authors also conduct a disaggregate analysis by looking at different real estate types in Germany’s most important metropolitan areas. In what follows, we investigate the relation of real estate prices and rents and test for explosive behaviour of the price-generating processes. Our findings suggest that the recent upswing in the German real estate market seems to be based on fundamental factors. Except for the sub-segment of flats in some of the metropolitan areas, there is no evidence for price increases being unsustainable.     

The Family's Financial Support as a “Poisoned Gift”: A Family Embeddedness Perspective on Entrepreneurial Intentions

We argue that greater availability of financial support by the family for creating a new venture entails stronger financial and non‐financial obligations. Cognizant of these obligations, potential founders anticipate negative performance implications for the planned firm and threats to the family system in the case of their non‐fulfillment. We thus postulate that the formation of actual entrepreneurial intentions is less likely the greater the available financial support. We confirm this by studying a sample of 23,304 respondents from 19 countries and find the negative relationship to be dependent on family cohesion and on individual entrepreneurial self‐efficacy.     

What is sustainable agriculture? Empirical evidence of diverging views in Switzerland and New Zealand

Public debates on sustainable agriculture tend to be shaped by dominant political stakeholders with a particular political agenda. They simultaneously contribute and respond to the formation of public opinion. In this paper, we investigate to what extent stakeholder attitudes and interests help explain national conceptions of sustainable agriculture and how these conceptions diverge between countries with different agricultural policies.For that purpose, we conducted two stakeholder perception surveys in Switzerland and New Zealand. The data analysis revealed that there are significant differences in perception between the two countries. While Swiss respondents felt that Swiss agriculture is already quite sustainable and that international trade and new technologies are likely to render it less sustainable, New Zealand respondents generally thought that economic and technological change is necessary to make agriculture more sustainable. The conservative Swiss attitude is in accordance with the country's defensive agricultural policy while the more progressive New Zealand attitude is clearly linked to its need to reconcile agricultural sustainability with national competitiveness.