منابع مشابه
How Long Are Product Cycles?
In this paper I identify new goods in U.S. imports data at the product levels of 7-digit TSUSA or 10-digit HS codes. I show that consistent with product cycles, the North’s new goods exports relative to old goods exports grow faster than the South’s, and then the South catches up with the North. The catch-up takes 13 ~ 18 years and happens in the 1990s, an age of globalization and outsourcing. ...
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TED is a program that “invents” conceptual schematics of optimized thermal systems. TED is based on the view that innovative design can be modeled as a search process and uses elements of the search algorithms that originated in the field of Artificial Intelligence. The search is guided by a special form of exergetic analysis. The theory behind the TED is discussed in details elsewhere. This pa...
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Forward chaining is an algorithm that is particularly simple, and therefore used in many inference systems. It computes the facts that are the consequence of a set of facts and rules. Unfortunately, this algorithm is not complete with respect to negation. To solve this problem, it is possible, in the context of propositional calculus, to automatically add the rules needed to make computations w...
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In this paper, we focus on how European economic integration has affected the synchronization and the magnitude of business cycles among participating countries. We measure, based on bandpass filtered data, the characteristics of European business cycles analyzing to what extent they have become more similar over time. We also consider the role of other factors such as differences in fiscal and...
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We study the behavior of credit and output across a financial crisis cycle using information from credit spreads. We show the transition into a crisis occurs with a large increase in credit spreads, indicating that crises involve a dramatic shift in expectations and are a surprise. The severity of the subsequent crisis can be forecast by the size of credit losses (change in spreads) coupled wit...
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ژورنال
عنوان ژورنال: Nature Reviews Immunology
سال: 2005
ISSN: 1474-1733,1474-1741
DOI: 10.1038/nri1673