Greenberg (2002) claims that the violation of CPT invariance in an interacting RQFT entails the violation of Lorentz invariance. This claim is surprising since standard proofs of the CPT theorem require more assumptions than Lorentz invariance, and are restricted to non-interacting, or at best, unrealistic interacting theories. This essay analyzes Greenberg's claim in the context of the debate ...

50 years of consumer decision research has resulted in many decision models and decision strategies, yet they appear conflicting and inconsistent. We know that consumers use different strategies in different decision contexts, yet we have insufficient understanding of how they choose and apply these strategies to yield predictability. We know that consumers sometimes trade-off between attribute...

1.1 The last 20 years have seen wide-ranging research, both theoretical and empirical, on the determinants of long term growth. “Old growth models” of closed economies have given way to “new growth models” of open economies in concert with “new trade” theories. Facilitated by the availability of data that compare income levels across countries in real terms, econometricians have been able to st...

We analyze convergence across countries over the last half century as a result of globalizing forces. Drawing on theories of modernization, dependency, the world-system, political trade blocs, and the world-society, we consider economic, demographic, knowledge, financial, and political dimensions of convergence. Using a new methodology, we calculate the minimum volume ellipsoid encompassing dif...

trade secrets has an important role in economic growth and development of economic competition. however ,one of the challenges in this sphere is the emergence of economice spionag. increasing growth of economic espionage causes to emerge a new phenomenon which is called information terrorism. so the mechanism of protection of the trade secretsincivil and criminal law is necessary for economic g...

Despite much progress, it remains challenging to develop new visualization systems, predict their qualities, and understand design trade-offs. We propose an empirical framework for Information Visualization (InfoVis) theories consisting of a context space, a visualization space, visualization metrics, and visualization principles. Using this framework, we identify 5 possible steps to advance In...

The large volume of intra-industry trade is often cited as a critical element favoring trade theories based on increasing returns and imperfect competition over those with constant returns and perfect competition. The former provide an elegant account of intra-industry trade, while the latter, it is often argued, cannot. This paper provides an account of intra-industry trade based squarely on c...

The aim of this paper is to analyse the role of trade credit in the financing of French small and medium-sized enterprises (SMEs) using specific data collected in a recent survey on small firms. We provide direct evidence that inter-firm credit offered by SMEs is sensitive to the strategic importance of firm size and position. Using existing theories, we also test a supply function and a model ...

This paper explores the leverage determinants across firms’ sizesbased on the two main theories behind the capital structure, the trade-offand the pecking order theories. A panel data is sued to find therelationship between capital structure and the variables that proxy forbenefits and costs of debt during 1990 to 2006. Our findings show thatboth principles help to explain the capital structure...

This paper reviews the recent theoretical literature on heterogeneous firms and trade, which emphasizes firm selection into international markets and reallocations of resources across firms. We discuss the empirical challenges that motivated this research and its relationship to traditional trade theories. We examine the implications of firm heterogeneity for comparative advantage, market size,...