Aggregate Behavior and Microdata

It is shown how one can effectively use microdata in modelling the change over time in an aggregate (e.g. mean consumption expenditure) of a large and heterogeneous population. The starting point of our aggregation analysis is a specification of explanatory variables on the micro-level. Typically, some of these explanatory variables are observable and others are unobservable. Based on certain hypotheses on the evolution over time of the joint distributions across the population of these explanatory variables we derive a decomposition of the change in the aggregate which allows a partial analysis: to isolate and to quantify the effect of a change in the observable explanatory variables. This analysis does not require an explicit treatment of the unobservable variables.

On Parametrization in Modelling Behavioral Heterogeneity.

In order to model the concept of behavioral heterogeneity, some authors have employed the following approach. By using affine transformations of the price space, a consumption sector is defined as the set of all transformed demand functions of a given "generating" demand function. This leads to a parametrization of the objects by elements of a finite dimensional Euclidian space. Increasing dispersedness of the parameter distribution is then interpreted as increasing behavioral heterogeneity of the consumption sector. In this paper, we show that such an interpretation is not valid if the generating demand function satisfies a mild regularity condition. Due to the specific parametrization, increasing heterogeneity of the parameters leads to decreasing heterogeneity of the demand functions. More precisely, we prove that they become concentrated nearby a finite set of Cobb-Douglas demand functioons.aggregate demand; behavioral heterogeneity; parametrization

A Countable Economy: An Example

Weiss (1981) established core equivalence and the existence of competitive equilibria in finitely additive exchange economies. To underline the relevance of finitely additive economies we present in this note an example with a close connection to finite exchange economies

Cowden syndrome - Diagnostic skin signs

Cowden syndrome is a rare autosomal dominant familial cancer syndrome with a high risk of breast cancer. The most important clinical features include carcinomas of the breast and thyroid, and hamartomatous polyps of the gastrointestinal tract. There are characteristic mucocutaneous features which allow early recognition of the disease and are generally present before internal malignancies develop. We report on a woman in whom the diagnosis of Cowden syndrome was first made after she had been treated for both breast cancer and melanoma. Copyright (C) 2001 S. KargerAG, Basel

A Normative Critique of Private Domain Name Dispute Resolution, 22 J. Marshall J. Computer & Info. L. 625 (2004)

In recent years, much has been made of the rapid expansion and tremendous commercial potential of the Internet. As such, domain names that contain or imply an entities trademarked name have become extremely valuable to these entities. The difficulty, however, is balancing the rights of the trademark owners with Internet users within the burgeoning commercial environment. This comment examines the balance between the Uniform Dispute Resolution Policy (UDRP) and traditional trademark protection. It discusses several persuasive documents including the International Trademark Association’s 1997 White Paper and the United States Department of Commerce’s Green and White papers. The comment further develops the Uniform Dispute Resolution Policy within the context of the Federal Anti-cyber-squatting Consumer Protection Act. Ultimately, the Uniform Dispute Resolution Policy is a legitimate and valid adjudicatory process. However, its attractiveness for forum shopping and the unchecked potential for reverse domain name hijacking provide a serious flaw to the UDRP. It is these issues that need to be addressed in order for the UDRP, or its eventual successor, to prevail

Improving the electrolyte-cathode assembly for MT-SOFC

In the long road towards commercialization of Solid Oxide Fuel Cells, improving the cathode’s performance is a major milestone. Achieving low Area Specific Resistances at temperatures around 600 °C are required to meet the market demands in terms of costs and lifetime. \ud In this thesis, different research projects focusing on the electrolyte / cathode assembly are described with as aims, an improvement of the performance and a better understanding of the cells.\ud To decrease the Area Specific Resistance (ASR) of the cathodes, two solutions are explored and combined in this thesis. \ud The first possibility is to replace the-state-of-the-art cathode materials by new and innovative materials. A study on Lanthanum Nickelate (La2NiO4+δ) as a porous electrode is shown This material shows excellent oxygen surface exchange and ionic diffusion.\ud The second possibility is to use one of the state-of-the-art materials and improve its microstructure. By engineering the electrolyte / cathode interface, it is shown for La0.6Sr0.4Co0.2Fe0.8O3-δ and for La2NiO4+δ that the oxygen surface transport on the cathode grains can be enhanced. The trick consists of introducing a thin dense layer of the cathode material between the porous electrode and the electrolyte.\ud Finally,a new method to produce a complete cell with Pulsed Laser Deposition is presented. PLD is a typical example of what nanotechnology can bring to improve Solid Oxide Fuel Cells

Texas Business Review, May 1975

The Business Situation in Texas; Nuclear Power in Texas 1954-1975; Texas ConstructionBureau of Business Researc