Equivalence Scales in an Intertemporal Setting with an Application to the Former West Germany

Equivalence scales provide answers to questions like how much a household with two children needs to spend compared to a couple to attain the same welfare level. These are important questions for child allowances, social benefits and to assess the cost of children over the life-cycle for example. We discuss equivalence scales in an intertemporal setting with uncertainty. To estimate equivalence scales we use a panel from German households (GSOEP) containing subjective data on satisfaction with life and satisfaction with income to represent the welfare level. Because satisfaction is measured on a discrete scale we use limited dependent variable models for panel data in estimation. Using satisfaction with life data we find that larger households do not need any additional income to be as satisfied as a couple. Using satisfaction with income, however, yields equivalence scales that increase with household size.     

Life cycle saving: Insights from the perspective of bounded rationality

This paper provides a new life cycle model that takes into account key elements of bounded rationality. The paper shows that the model can account for patterns in the data that are hard to explain by the standard life cycle model. Among other patterns, the model predicts that, typically, the young either hold no equity or their equity portfolio share is rather low and then increases over working life. The analytical solution of the model demonstrates its high degree of tractability.     

Who should sell stocks?

Never selling stocks is optimal for investors with a long horizon and a realistic range of preference and market parameters, if relative risk aversion, investment opportunities, proportional transaction costs, and dividend yields are constant. Such investors should buy stocks when their portfolio weight is too low and otherwise hold them, letting dividends rebalance to cash over time rather than selling. With capital gains taxes, this policy outperforms both static buy‐and‐hold and dynamic rebalancing strategies that account for transaction costs. Selling stocks becomes optimal if either their target weight is low or intermediate consumption is substantial.     

An integrative model of e-learning use: Leveraging theory to understand and increase usage

Employees are increasingly using technology to access content for learning, and theory development has been outpaced by practice. Drawing on a well validated theory of behavior change (the Transtheoretical Model of Change), as well as theories on technology acceptance and employee development, this paper offers an integrative model of factors that influence employee use of e-learning as well as practical recommendations for how use might be increased. Recommendations for future research on e-learning are also offered.     

Cybersecurity: Stakeholder incentives,externalities, and policy options

Information security breaches are increasingly motivated by fraudulent and criminal motives. Reducing their considerable costs has become a pressing issue. Although cybersecurity has strong public good characteristics, most information security decisions are made by individual stakeholders. Due to the interconnectedness of cyberspace, these decentralized decisions are afflicted with externalities that can result in sub-optimal security levels. Devising effective solutions to this problem is complicated by the global nature of cyberspace, the interdependence of stakeholders, as well as the diversity and heterogeneity of players. The paper develops a framework for studying the co-evolution of the markets for cybercrime and cybersecurity. It examines the incentives of stakeholders to provide for security and their implications for the ICT ecosystem. The findings show that market and non-market relations in the information infrastructure generate many security-enhancing incentives. However, pervasive externalities remain that can only be corrected by voluntary or government-led collective measures.     

The Europeanization of organic agriculture and conflicts over agricultural policy

Organic agriculture was Europeanized through two EU regulations which defined and provided financial support for it. In transposing these regulations, member states have had to deal with political aspects of the conflict between mainstream and organic agriculture. A comparison of 13 new (including former socialist states) and old member states illustrates that the level of conflict had an impact only on the level of financial support transposed, while other aspects of transposition were explained by formal institutional preconditions. Low financial support was found in those member states with a high level of conflict or a low value-based level of conflict. Medium financial support was found in one new and one old member state characterized by medium level conflicts. High financial support appeared in three member states characterized by truly low level conflicts in terms of common organic and mainstream agriculture interests.