Die Finanzkrise — im Kern eine Einlagenkrise der Schattenbanken

Die Ursachen der Finanzkrise werden in der wissenschaftlichen Debatte sehr unterschiedlich beschrieben. Der Autor vertritt die Auffassung, dass die Finanzkrise im Wesentlichen aus einem fundamentalen Mangel an „sicheren“ Aktiva resultiert. Schutzmechanismen für institutionelle Investoren im Geldmarkt, die wie die traditionelle Einlagensicherung funktionieren, k?nnten einen wesentlichen Beitrag zur Aufl ?sung der Finanzkrise leisten.     

DISCRETE CHOICE MODELS WITH MULTIPLE UNOBSERVED CHOICE CHARACTERISTICS*

Since the pioneering work by Daniel McFadden, utility‐maximization‐based multinomial response models have become important tools of empirical researchers. Various generalizations of these models have been developed to allow for unobserved heterogeneity in taste parameters and choice characteristics. Here we investigate how rich a specification of the unobserved components is needed to rationalize arbitrary choice patterns in settings with many individual decision makers, multiple markets, and large choice sets. We find that if one restricts the utility function to be monotone in the unobserved choice characteristics, then up to two unobserved choice characteristics may be needed to rationalize the choices.     

A Positive Theory of Social Security

In many countries, social security accounts for a large fraction of the government budget. Why is this so, given that at any point in time the number of recipients of social security benefits is smaller than the number of contributors? In the overlapping‐generations model studied in this paper, all individuals currently alive vote on social security in every period. In equilibrium, the size of social security is larger, the greater is the proportion of elderly people in the population, and the greater is the inequality of pre‐tax income within each generation. Both predictions of the theory are supported by the empirical evidence in cross‐country data.     

Optimal simple rules and the lower bound on the nominal interest rate in the Christiano–Eichenbaum–Evans model of the US business cycle

Schmitt-Grohé and Uribe (NBER wp 10724, 2004b) analyzes the optimal, simple and implementable monetary policy rules in a medium-scale macromodel, as the one proposed by Christiano et al. (J Polit Econ 113:1–45, 2005). In doing so, they use a sensible, but somewhat arbitrary constraint to account for the lower bound condition on the nominal interest rate. In this work, we check the robustness of their main results to such a criteria. We find that the optimal policies are actually absolutely robust to the easing of this criterion for all the different cases considered.

Block recursive equilibria for stochastic models of search on the job

We develop a general stochastic model of directed search on the job. Directed search allows us to focus on a Block Recursive Equilibrium (BRE) where agents' value functions, policy functions and market tightness do not depend on the distribution of workers over wages and unemployment. We formally prove existence of a BRE under various specifications of workers' preferences and contractual environments, including dynamic contracts and fixed-wage contracts. Solving a BRE is as easy as solving a representative agent model, in contrast to the analytical and computational difficulties in models of random search on the job.     

Managing Impressions in the Face of Rising Stakeholder Pressures: Examining Oil Companies’ Shifting Stances in the Climate Change Debate

In this paper, we examine how organizations’ impression management (IM) evolves in response to rising stakeholder pressures regarding organizations’ corporate responsibility initiatives. We conducted a comparative case study analysis over a period of 13 years (1997–2009) for two organizations—Exxon and BP—that took extreme (but different) initial stances on climate change. We found that as stakeholder pressures rose, their IM tactics unfolded in four phases: (i) advocating the initial stance, (ii) sensegiving to clarify the initial stance, (iii) image repairing, and (iv) adjusting the stance. Taken together, our analysis of IM over these four phases provides three key insights about the evolution of IM in the face of rising pressures. First, when faced with stakeholder pressures, it seems that organizations do not immediately resort to conforming but tend to give in gradually when pressures increase and start to come from relatively powerful stakeholders. Second, evolution of IM seems to be characterized by path dependence, i.e., even as organizations’ positions evolve, they continue to show their conviction in their initial positions and try to convey that their subsequent positions flow logically from the previous ones. Finally, IM involves navigation between symbolism and substance, and companies tend to strive toward harmonizing their symbolic and substantive actions as stakeholder pressure increases.