Robust Incentives

In this paper we consider a moral hazard problem, in which the agent after receiving his wage contract but before undertaking the costly effort can borrow on his future wage earnings. The game between the agent and potential lenders is modelled as an infinite stochastic game with an exogenous stopping probability. We show that the principal cannot design a wage scheme that is robust to hedging by the agent. In particular, we show that, if the exogenous stopping probability is non zero, the principal's wage offer will be followed by several rounds of borrowing by the agent. This is compared to the recontracting-proofness equilibria which most of the literature has concentrated on, assuming that this stopping probability is zero. Furthermore, we show that the equilibrium of the model with a strictly positive stopping probability does not converge to the equilibrium of the model in which it is zero. We also find that the principal's profit is lower, the maximum wage payment can be higher and effort is lower

Sovereign wealth funds as a new instrument of climate protection policy? Study of Norway as a pioneer of ethical guidelines for investment policy

Norway's abundance of resources is the establishing factor in explaining how the North European state ranks among the countries worldwide with the highest standard of living. Indeed, fossil fuels are finite and after their depletion the Norwegian social welfare state should endure. Therefore, a sovereign wealth fund has been founded in the kingdom in 1990, in which the surpluses from the oil and gas industry sales have been invested from that time on. This method should secure the state's ability to act in the post-petroleum era. At the end of the 1990's the voice of Norwegian society insisted that the sovereign wealth fund should not only be for intergenerational justice, but should also contribute to the implementation of worth and norms of the present country. In the end of 2004 the Parliament (Storting), on the basis of the Graver Report, finally agreed upon ethic regulations for the investment of the sovereign wealth fund. With capital of over 280 billion Euros (figures from 2007), the second largest sovereign wealth fund in the world, they should now only have businesses in their portfolio which adhere to those ethical regulations. In the present paper, the emergence and outcomes of the development of a Third Way between maximising profit and sustainability will be illustrated. The ethical regulations have different dimensions (e.g. no contribution to human rights violations, child labour, serious environmental damages, etc.) to which the present text concentrates on posing the question to what extent sovereign wealth funds could be a new instrument of climate protection policy. For this purpose, the contribution of both main instruments of ethical regulations, Active Ownership and the exclusion of businesses, were analysed as well as the actors which have been created for their implementation. The repercussions reach from dialogs with businesses in the USA to stop lobby activities against Congress-planned climate protection laws, such as an emissions trading system, to adjusting to the exclusion of individual firms from the portfolio of welfare states, due to a breach of ethics. The drawbacks and constraints of a takeover of the Norwegian regulations by other financial actors and its first diffusion effects will be analysed. Finally, this article will deal with the running evaluations of the ethical regulations and Norwegian current and future domestic climate policies. -- Der Ressourcenreichtum Norwegens hat die Grundlage dafür geschaffen, dass der nordeuropäische Staat weltweit zu den Ländern mit dem höchsten Lebensstandard zählt. Doch fossile Energien sind endlich, und auch nach ihrer Erschöpfung soll der norwegische Wohlfahrtstaat Bestand haben. Deshalb wurde in dem Königreich im Jahr 1990 ein Staatsfonds aufgelegt, in dem seither die Überschüsse aus dem Öl- und Gasverkauf angelegt werden. Diese Mittel sollen die Handlungsfähigkeit des Staates in der Post-Petroleum-Ära sicherstellen. Ende der 1990er Jahre wurden in der norwegischen Gesellschaft Stimmen laut, dass der Staatsfonds nicht nur zur intergenerationellen Gerechtigkeit, sondern auch zur Umsetzung der Werte und Normen des Landes in der Gegenwart beitragen solle. Ende 2004 wurden schließlich vom Parlament (Storting) auf Basis des Graver Reports ethische Richtlinien für die Anlagepolitik des Staatsfonds beschlossen. Der mit einem Vermögen von über 280 Mrd. Euro (Stand Ende 2007) zweitgrößte Staatsfonds der Welt soll nun nur noch Unternehmen in seinem Portfolio haben, die diese ethischen Richtlinien einhalten. Im vorliegenden Paper werden Genese und Outcome dieser Entwicklung eines Dritten Weges zwischen Profitmaximierung und Nachhaltigkeit dargestellt. Die Ethik-Richtlinie hat verschiedene Dimensionen (u. a. kein Beitrag zu Menschenrechtsverletzungen, Kinderarbeit, schweren Umweltschäden, etc.), wobei sich der vorliegende Text auf die Fragestellung konzentriert, inwiefern Staatsfonds ein neues Instrument der Klimaschutzpolitik sein können. Dazu werden der Beitrag der beiden Hauptinstrumente der Ethikrichtlinien, das Active Ownership und der Unternehmensausschluss, zum globalen Klimaschutz ebenso analysiert wie die zu ihrer Umsetzung geschaffenen Akteure. Die Bandbreite der Auswirkungen reicht dabei vom Dialog mit Unternehmen in den USA, Lobbytätigkeiten gegen vom Kongress geplante Klimaschutzgesetze einzustellen bis hin zur Verbannung einzelner Firmen aus dem Portfolio des Staatsfonds wegen groben Verstößen gegen die Ethik-Richtlinien. Die Möglichkeiten und Grenzen einer Übernahme der norwegischen Regeln durch andere Akteure der Finanzwirtschaft werden ebenso untersucht wie erste Diffusionseffekte. Schließlich wird auf die laufende Evaluation der Ethik-Richtlinien und auf Stand und Perspektiven norwegischer Klimaschutzinnenpolitik eingegangen.

On the Crystallization of Terbium Aluminium Garnet

Attempts to grow terbium aluminium garnet (Tb3Al5O12, TAG) by the Czochralski method lead to crystals of millimeter scale. Larger crystals could not be obtained. DTA measurements within the binary system showed that TAG melts incongruently at 1840 deg. C. The perovskite (TbAlO3, TAP) with a congruent melting point of 1930 deg. C is the most stable phase in this system. The region for primary crystallization of TAP covers the chemical composition of TAG and suppresses the primary crystallization of the terbium aluminium garnet.Comment: 6 pages, 2 figure

Investigation of a 2-Colour Undulator FEL Using Puffin

Initial studies of a 2-colour FEL amplifier using one monoenergetic electron beam are presented. The interaction is modelled using the unaveraged, broadband FEL code Puffin. A series of undulator modules are tuned to generate two resonant frequencies along the FEL interaction and a self-consistent 2-colour FEL interaction at widely spaced non-harmonic wavelengths at 1nm and 2.4nm is demonstrated.Comment: Submitted to The 35th International Free-Electron Laser Conference, Manhattan, New York (2013

Imperfect Commitment and the Revelation Principle: The Multi-Agent Case with Transferable Utility

Bester and Strausz (2000) showed that the revelation principle of Bester and Strausz (2001) does not apply in a setting of many agents and no commitment. In their counterexample only one agent has private information. We show that if the parties can make ex ante transfers the revelation principle does extend to this setting. However, we show that it does not extend to a setting in which more than one agent has private information

Good environmental governance for renewable energies: The example of Germany - lessons for China?

Germany’s pioneering role in the field of renewable energies (RES) can best be observed by its world leading position in installed wind power and photovoltaics. Also its first European rank in the production of biofuels and installed solar thermal collector space is remarkable. These successes are not due to an exceptionally good natural resource base; mainly they are the result of an innovative national support policy. Pressure from the European and international commitments also have contributed to the German success story in RES. The current paper analyses the main factors of the German case in the development of RES, including the design elements of the national promotion instruments and support programmes, the policy impacts from the European and the international level, technical as well as cognitive conditions. In addition, a description is given of further driving forces for a successful RES development in other European countries. The paper ends with the question which of the described success factors of the German RES case might be transferable to China - and which not. --