We consider a Cournot oligopoly setting in which consumers have an intrinsic preference for variety, while unit production costs of firms increase with the number of goods they produce. This environment exhibits a general under-provision of variety with respect to social welfare. JEL Classification Numbers: C70, L13, L20

This paper proposes the solution concept of interim correlated rationalizability, and shows that all types that have the same hierarchies of beliefs have the same set of interim correlated rationalizable outcomes. This solution concept characterizes common certainty of rationality in the universal type space. JEL Classi…cation and keywords: C70, C72, rationalizability, incomplete information, c...

This paper highlights connections between the discrete and continuous approaches to optimal auction design with single and multi-dimensional types. We provide an interpretaion of an optimal auction design problem in terms of a linear program that is an instance of a parametric shortest path problem on a lattice. We also solve some cases explicitly in the discrete framework. JEL Classification: ...

This paper examines evolutionary equilibrium selection in bargaining models. We show that random best-response and continuous best-response learning dynamics give rise to (different) simple sufficient conditions for identifying outcomes as stochastically stable. This allows us to characterize the implications of these dynamics in simple bargaining games.  2003 Elsevier Inc. All rights reserved...

The synthesis of a variety of PCBM-type [5,6]-fulleroids and their further highly selective photoisomerization to the respective [6,6]-methanofullerenes is presented. Interestingly, the chemical reactivity of [5,6]-fulleroids reveals the same trend (a > b > c > d) to that observed for pristine C70 (α > β > γ > δ).

Effects on C60 by thermal fluctuations of phonons, misalignment of C60 molecules in a crystal, and other intercalated impurities (remaining C70, oxygens, and so on) are simulated by disorder potentials. The Su-SchriefferHeeger–type electron-phonon model for doped C60 is solved with gaussian bond disorders and also with site disorders. Sample average is performed

A regiospecific bis-adduct of C70 with anthracene was prepared with unusually high yield (68%) by the Diels-Alder reaction in the absence of solvent (melt). The structure of the bis-adduct was an unexpected 12 o'clock isomer, as determined by single crystal X-ray diffraction, thermal gravimetric analysis (TGA) and spectroscopy.

This paper studies a class of multidimensional screening models where different type dimensions lie on the real line. The paper applies preservation results of totally positive functions to show that some critical properties of the distributions of asymmetric information parameters, such as increasing hazard rate, monotone likelihood ratio, and unimodality are preserved under convolution and/or...