Specialization dynamics.

This paper proposes a new empirical framework for analyzing specialization dynamics. A country’s pattern of specialization is viewed as a distribution across sectors, and statistical techniques for analyzing the evolution of this entire distribution are employed. The empirical framework is implemented using data on 20 industries in 7 OECD countries since 1970. We find substantial mobility in patterns of specialization. Over time horizons of 5 years, this is largely explained by forces common across countries including world prices and common changes in technical efficiency. Over longer time horizons, country-specific changes in factor endowments become more important. There is no evidence of an increase in countries’ overall degree of specialization.

Onsite Research in the U.S. and Canada: Govemental Data Availability in Notrh America

This paper attempts to reveal the vertical specialization dependence relationship in East Asian countries using the multi country vertical specialization dependence modeling based on the Asian International Input-Output data. Use of multi country model allows us to study the country-wise vertical specialization association that is not possible with the single country model. More over, the multi country vertical specialization dependence modeling, a new approach to study the vertical specialization (imported intermediate goods to produce the export goods), enables us to explain the dependence on domestic intermediate goods and the dependence on other countries as well. The results show that the vertical specialization dependence on total import and group of USA, EU and ROW is high in general among the East Asian countries. However, it is also important to note that the vertical specialization dependence on 9 Asian countries and Hong Kong is relatively high as compared to non-regional countries. Such a situation of vertical specialization dependence in East Asia indicates the strong relationship (in terms of vertical specialization) among the Asian countries.International trade, Input-Output analysis, Vertical specialization, East Asia

Adversarial Propagation and Zero-Shot Cross-Lingual Transfer of Word Vector Specialization

Semantic specialization is the process of fine-tuning pre-trained distributional word vectors using external lexical knowledge (e.g., WordNet) to accentuate a particular semantic relation in the specialized vector space. While post-processing specialization methods are applicable to arbitrary distributional vectors, they are limited to updating only the vectors of words occurring in external lexicons (i.e., seen words), leaving the vectors of all other words unchanged. We propose a novel approach to specializing the full distributional vocabulary. Our adversarial post-specialization method propagates the external lexical knowledge to the full distributional space. We exploit words seen in the resources as training examples for learning a global specialization function. This function is learned by combining a standard L2-distance loss with an adversarial loss: the adversarial component produces more realistic output vectors. We show the effectiveness and robustness of the proposed method across three languages and on three tasks: word similarity, dialog state tracking, and lexical simplification. We report consistent improvements over distributional word vectors and vectors specialized by other state-of-the-art specialization frameworks. Finally, we also propose a cross-lingual transfer method for zero-shot specialization which successfully specializes a full target distributional space without any lexical knowledge in the target language and without any bilingual data.Comment: Accepted at EMNLP 201

Specialization effect and its influence on memory and problem solving in expert chess players

Expert chess players, specialized in different openings, recalled positions and solved problems within and outside their area of specialization. While their general expertise was at a similar level players performed better with stimuli from their area of specialization. The effect of specialization on both recall and problem solving was strong enough to override general expertise – players remembering positions and solving problems from their area of specialization performed at around the level of players one standard deviation above them in general skill. Their problem solving strategy also changed depending on whether the problem was within their area of specialization or not. When it was, they searched more in depth and less in breadth; with problems outside their area of specialization, the reverse. The knowledge that comes from familiarity with a problem area is more important than general purpose strategies in determining how an expert will tackle it. These results demonstrate the link in experts between problem solving and memory of specific experiences and indicate that the search for context independent general purpose problem solving strategies to teach to future experts is unlikely to be successful

Technology and Trade - an analysis of technology specialization and export flows

This paper examines how technology specialization, measured by citations-weighted patents, affects trade flows. The paper analyzes (i) the relationship between technology specialization and export specialization across regions and (ii) how the technology specialization of origin and destination affect the size and structure of link-specific export flows. We find that the export specialization of a region typically corresponds to the region’s technology specialization, which supports the view that comparative advantages can be created by investments in technology and knowledge. Export flows from regions to destination countries with similar technology specialization as the origin regions consist of commodities of higher quality in the specific technology, as indicated by higher prices. Highly specialized regions export more and charge higher prices. The results of the paper suggest that an understanding of trade ultimately requires an understanding of the spatial pattern of investments in (and creation of) technology and knowledge, as such investments shape export specialization patterns and the corresponding composition of export flows between locations across space.exports; technology; knowledge; specialization; quality; patents

(WP 2018-05) Specialization, Fragmentation, and Pluralism in Economics

This paper investigates whether specialization in research is causing economics to become an increasingly fragmented and diverse discipline with a continually rising number of niche-based research programs and a declining role for dominant cross-science research programs. It opens by framing the issue in terms of centrifugal and centripetal forces operating on research in economics, and then distinguishes descriptive from normative pluralism. It reviews recent research regarding the JEL code and the economics’ J. B. Clark Award that points towards rising specialization and fragmentation of research in economics. It then reviews five related arguments that might explain increasing specialization and fragmentation in economics: (i) Smith’s early division of labor view, (ii) Kuhn’s later thinking about the importance of specialization, (iii) Heiner’s behavioral burden of knowledge argument, (iv) Ross innovation-diffusion analysis and Arthur’s theory of technological change as determinants of specialization in science, and (v) the effects of space and culture or internationalization on innovation appropriation. The paper then discusses what descriptive pluralism implies about normative pluralism, and makes a case for multidisciplinarity over interdisciplinarity as a basis for arguments promoting pluralism. The paper closes with brief comments on the issue of specialization and pluralism in the wider world outside economics and science

The specialization index of a variety over a discretely valued field

Let $X$ be a proper variety over a henselian discretely valued field. An important obstruction to the existence of a rational point on $X$ is the index, the minimal positive degree of a zero cycle on $X$. This paper introduces a new invariant, the specialization index, which is a closer approximation of the existence of a rational point. We provide an explicit formula for the specialization index in terms of an $snc$-model, and we give examples of curves where the index equals one but the specialization index is different from one, and thus explains the absence of a rational point. Our main result states that the specialization index of a smooth, proper, geometrically connected $\mathbb{C}((t))$-variety with trivial coherent cohomology is equal to one