1,721,997 research outputs found
Time-Division is Optimal for Covert Communication Over Some Broadcast
No full textWe consider a covert communication scenario where a transmitter wishes to communicate simultaneously to two legitimate receivers while ensuring that the communication is not detected by an adversary, the warden. The legitimate receivers and the adversary observe the transmission from the transmitter via a three-user discrete or Gaussian memoryless broadcast channel. We focus on the case where the "no-input" symbol is not redundant, i.e., the output distribution at the warden induced by the no-input symbol is not a mixture of the output distributions induced by other input symbols, so that the covert communication is governed by the square root law, i.e., at most Theta(root n) bits can be transmitted over n channel uses. We show that for such a setting, a simple time-division strategy achieves the optimal throughputs for a non-trivial class of broadcast channels; this is not true for communicating over broadcast channels without the covert communication constraint. Our result implies that a code that uses two separate optimal point-to-point codes each designed for the constituent channels and each used for a fraction of the time is optimal in the sense that it achieves the best constants of the root n-scaling for the throughputs. Our proof strategy combines several elements in the network information theory literature, including concave envelope representations of the capacity regions of broadcast channels and El Gamal's outer bound for more capable broadcast channels.11Nsciescopu
Further Modernization and Competititveness Enhancement of the Industrial Sector of Uzbekistan through Creation of Industrial Cluster
No full textChapter 1. Further Modernization and Competititveness Enhancement of the Industrial Sector of Uzbekistan through Creation of Industrial Clusters
Summary
1. Introduction
2. Industrial Clusters: Basic Concepts and Stylized Facts
3. Analysis of the Potential for Industrial Clustering in Uzbekistan
4. Korean Experiences and Policy Discussions for Uzbekistan
ReferencesTRU
A comparative study on export promotion programs: Manufacturing versus services
No full textThis paper provides a comparative study on the effectiveness of exportpromotion programs between manufacturing and service firms, basedon a survey analysis for Korean companies. Specifically, we explorethe relationships among the characteristics of individual firms, the keybarriers to trade for these firms and the effectiveness of EPPs. First ofall, our estimation results show that the net impact of exportpromotion programs on individual firms’ export performance, aftercontrolling for firm-level heterogeneity, tends to be more significant formanufacturing firms than for service firms. Second, regardless of anindividual firm’s status or characteristics, bottlenecks in overseasmarketing, such as the lack of marketing experts and the difficulty insecuring foreign distribution networks, are the most bindingconstraints to exporting activities. Third, while firms have differentneeds for public export support depending on their own characteristics,this mechanism is more complex for service firms relative tomanufacturers.2
What Determines In-house Service Activities within Manufacturing Firms?: Micro Evidence from Korea
Full text linkThis paper explores the pattern and determinants of the servicification of Korean manufacturing over the period 2006-2018. We first compute the net contribution of in-house provision of services to manufacturing value added, using data from an employee-level labour survey. We compare this result with domestic and foreign outsourcing to examine the relationship between these different modes of servicification. More importantly, based on an extensive establishment-level panel dataset, this paper empirically investigates the key determinants of in-house service activities within manufacturing firms. Our analysis suggests that the net contribution of in-house service activities to manufacturing value added was around 18.6~22.5% between 2009 and 2018. At the industry-level, in-house service activities are positively correlated with domestic outsourcing, but negatively correlated with foreign outsourcing. Our regression results indicate that companies with higher export intensities, wider networks of overseas subsidiaries or those located in the Seoul metropolitan area engage in more in-house service activities, while having domestic subsidiaries have no statistically significant effect on in-house service activities. Finally, in contrast to the industrylevel results, using firm-level data we find no clear relationship between domestic outsourcing and in-house service activities
International Trade and Within-Sector Wage Inequality: The Case of South Korea
No full textThis paper studies which factors contributed to the changes in wage inequality in Korean manufacturing over the last three decades. By adopting Akerman et al. (2013)’s decomposition method, we examine the relative importance of within-sector and between-sector wage variations in Korean manufacturing over the period of 1980–2012. Our analytic results confirm that within-sector wage variation explains the lion's share of overall wage inequality. Taking this finding into account, we estimate the impacts of international trade, skilled-biased technological change and labor market conditions on within-sector wage inequality in Korea. Our estimation results suggest that there was a structural change in determinants of wage inequality before and after the mid-1990s. The influence of international trade mainly through heightened import competition on wage dispersion became relatively more conspicuous over the last two decades. © 20161
The Impact of outward FDI on export activities: evidence from the Korean case
No full textThis book brings together studies conducted by researchers in East Asian countries who seek to better understand the impact of China’s rise and the consequent policy challenges.
The expert contributors illustrate that the rise of China and its integration with the rest of the world is one of the most important developments in the global economy. Over the past thirty years or so, China’s economy has grown at nearly ten percent per annum with the expansion of the modern, export-oriented industrial sector, to become the third largest economy in the world and the second largest in trade. This book reviews the economic growth of East Asian countries since the 1990s and the various impacts that the rise of China has had on these countries. In particular, it addresses policy challenges faced in coping with the rise of China and maintaining economic growth.
This timely book will strongly appeal to academics and researchers focusing on East Asia and China as well as those interested in international trade, development and economic growth.TRU
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