This paper is focused on the role of main social activities, as creating and sharing personal content. The reason is connected to the raise up, in last ten years, of User Generated Content as a system to allow people to be active on the Web3. In the first paragraph I analyze the Web-population through recent surveys, showing different ways to classify generations. I comment the Jenkins’ “convergence culture” [2006], the push and pull media definition of Negroponte [1995] and the difference between digital natives and digital immigrants [Prensky 2001]. The second paragraph deals with use and consumption of digital media between young and adults from the computer use to mobile-phone and portable gaming device. In particular the mobile-phone seems to be an important medium to be online in every place and every time: it allows people to take and share photos, video, text and so on. This brings us to the third paragraph where I discuss mobility and applications: following Anderson [2010] the desktop is replaced with the webtop or web-applications that do not require a browser to be used. This is particularly evident for recent mobile devices as iPhone and iPad. Convergence and mobility allow people to share content in every time: yet ten years ago people used to share digital information (file-sharing) as video, music and text, by illegal channels such as Napster, without knowing who uploaded that on the Web. The Web 1.0 phase was characterized by an “anonymous dimension”. Instead, the current Web allows people to share information about their own life, publishing on social media, freely, their own photo, video, text, with real name and surname (life-sharing). At the center of the Web is the “ego”, the user. In the fifth chapter I analyze three social media that are currently catching up people’s attention Facebook, YouTube, Twitter – and I try to explain how they make possible to users to share culture and frame of their life. At the end I spent some words about piracy and privacy issue that social media bring up.
Published as: Jorge Martinez and Paul Smoke. Introduction in <em>Local Government Finance: The Challenges of the 21st Century. </em>United Cities and Local Governments' Second Global Report on Decentralization and Local Democracy, Barcelona 2010.Edward Elgar, 2011. (c) United Cities and Local Governments. Published by <a href="http://www.e-elgar.co.uk/">Edward Elgar</a>. Posted with the permission of the publisher for personal use only.
Claudia Dziobek, Miguel Alves, Majdeline El Rayess, Carlos Alberto Gutierrez Mangas · 5 authors
A useful but little known feature of the IMF’s Government Finance Statistics Yearbook (GFSY) is the information on the structure of governments. Institutional tables, included in the GFSY, provide detail on the central, state, and local levels of governments, social security, and extrabudgetary units. We refer to the main levels of government as GL1, GL2, and GL3 in ascending order of institutional coverage. We present maps of the various levels of government for 74 countries to illustrate the usefulness of this database and make it more accessible to users. The maps provide information about how centralized or decentralized government finances and employment are and their size relative to the overall economy. Government map data facilitate the monitoring of fiscal policy and fiscal rules.
The main aim of this report is to present a picture of the current organization of nephrology in Spain. The Spanish health system offers almost universal coverage, a wide variety of services and a high-quality network of hospitals and primary care centers. Spain has a specialized health care training system that is highly developed, highly regulated, with the capacity to provide high-quality training in 54 different specialties. Nephrology is basically a hospital-based specialty. There are no private dialysis patients in Spain. Hemodialysis centers are 40% public, 15% private and 45% run by companies. The National Health System covers 95% of the population, and there is no cost to patients for treatment of renal disease (dialysis and transplant). We observed a clear decrease of nephrology in residents' election rankings, with position 29 out of 47 specialties in 2007. Some of the reasons for this are the complexity of the subject, no clear information at the university, reduction of professional posts and a very good public service with minimal private practice. In Spain, a model of organization for transplantation was adopted based on a decentralized transplant coordinating network. For cadaveric donors, it compares favorably with rates in other Western countries. Living donor transplantation is very low in Spain--just 10% of total renal transplantation activity. New programs due to financial constraints need to include reduced dialysis costs, greater cost-effectiveness of prescriptions, better handling of ethical issues related to the need for using a clinical score of chronic kidney disease patients to make decisions about conservative or renal replacement therapy and an action plan for improvement of organ donation and transplantation. Recovery of skills (acute kidney injury, biopsies, vascular access, etc.), research and advances in autonomous activities (imaging, surgical and medical vascular training, etc.) are some of the future educational paths needed in nephrology. Adequate decisions in the context of economic restrictions need to be discussed for the sustainability of nephrological care.
ICT-lawyer (partner) at time.lex, a Brussels based law firm with focus on business law in the information society. His areas of interest are legal management of ICT-projects, data protection and privacy, e-business, electronic contracting, outsourcing and service level agreements, intellectual property, security, electronic invoicing, copyright, trade marks, e-money, e-banking and payments etc. He is also an associate researcher at the Interdisciplinary Centre for Law and Information Technology (ICRI) at the University of Leuven, and assistant at the University of Antwerp. Bitcoin is a free open source peer-to-peer electronic cash system that is completely decentralised, without the need for a central server or trusted parties. This article focuses briefly on some legal issues related to financial regulatory aspects about e-money and payment services.
Anna Sagan, Dimitra Panteli, W Borkowski, M Dmowski · 31 authors
Since the successful transition to a freely elected parliament and a market economy after 1989, Poland is now a stable democracy and is well represented within political and economic organizations in Europe and worldwide. The strongly centralized health system based on the Semashko model was replaced with a decentralized system of mandatory health insurance, complemented with financing from state and territorial self-government budgets. There is a clear separation of health care financing and provision: the National Health Fund (NFZ) the sole payer in the system is in charge of health care financing and contracts with public and non-public health care providers. The Ministry of Health is the key policy-maker and regulator in the system and is supported by a number of advisory bodies, some of them recently established. Health insurance contributions, borne entirely by employees, are collected by intermediary institutions and are pooled by the NFZ and distributed between the 16 regional NFZ branches. In 2009, Poland spent 7.4% of its gross domestic product (GDP) on health. Around 70% of health expenditure came from public sources and over 83.5% of this expenditure can be attributed to the (near) universal health insurance. The relatively high share of private expenditure is mostly represented by out-of-pocket (OOP) payments, mainly in the form of co-payments and informal payments. Voluntary health insurance (VHI) does not play an important role and is largely limited to medical subscription packages offered by employers. Compulsory health insurance covers 98% of the population and guarantees access to a broad range of health services. However, the limited financial resources of the NFZ mean that broad entitlements guaranteed on paper are not always available. Health care financing is overall at most proportional: while financing from health care contributions is proportional and budgetary subsidies to system funding are progressive, high OOP expenditures, particularly in areas such as pharmaceuticals, are highly regressive. The health status of the Polish population has improved substantially, with average life expectancy at birth reaching 80.2 years for women and 71.6 years for men in 2009. However, there is still a vast gap in life expectancy between Poland and the western European Union (EU) countries and between life expectancy overall and the expected number of years without illness or disability. Given its modest financial, human and material health care resources and the corresponding outcomes, the overall financial efficiency of the Polish system is satisfactory. Both allocative and technical efficiency leave room for improvement. Several measures, such as prioritizing primary care and adopting new payment mechanisms such as diagnosis-related groups (DRGs), have been introduced in recent years but need to be expanded to other areas and intensified. Additionally, numerous initiatives to enhance quality control and build the required expertise and evidence base for the system are also in place. These could improve general satisfaction with the system, which is not particularly high. Limited resources, a general aversion to cost-sharing stemming from a long experience with broad public coverage and shortages in health workforce need to be addressed before better outcomes can be achieved by the system. Increased cooperation between various bodies within the health and social care sectors would also contribute in this direction. The HiT profiles are country-based reports that provide a detailed description of a health system and of policy initiatives in progress or under development. HiTs examine different approaches to the organization, financing and delivery of health services, and the role of the main actors in health systems; they describe the institutional framework, process, content and implementation of health and health care policies; and highlight challenges and areas that require more in-depth analysis.
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The Croatian “decentralization package” from mid-2001 has shown how multiple pressures for shifting power to the local level may actually result in relative failure. The central government has ceded the control in particular policy sectors by shifting responsibilities for certain educational, welfare and health services to the counties and municipalities. However, the decentralization initiative was excessively marked as very limited and strongly labeled by the vertical policy dimension, expressing the dominance of top-down incentives of the central government in comparison to bottom-up initiatives stemming from the local government units. The 2001 decentralized package did not substantially increase the portion of local governments finance in total public finance, showing a failure to provide local government units with stronger fiscal capacity. The central government bodies also did not take into account the alternative proposals made by various policy actors ranging from academic institutions, researchers in NGOs, and associations of local government organizations. All these things have contributed to a relatively negligible influence of the horizontal policy dimension on the decentralization outcome. The whole process can therefore be described as centrally controlled decentralization, or decentralization from above.
We contribute to the literature on the political determinants of regional financing by analyzing the case of Spain, a largely decentralized country. Using a dynamic panel data model, we argue that the rise in relative bargaining power of regional parties in Spain can partly explain the increase in budgetary allocations to regions observed during the period 1986 – 2006. In particular, our results show that the rise in parliamentary representation of the nationalist Catalonian party, measured by the Banzhaf voting power index, has been a significant factor in ensuring increasing financial resources to regional governments. In addition, the traditional hypotheses of the political economy literature on legislative apportionment are tested for the case of Spain, with no significant results observed. The overall distribution of regional financing in Spain seems to be in general well aligned with the basic economic principles of efficiency and equity recommended for such a system.
A non-interactive zero-knowledge proof can be used to demonstrate the truth of a statement without revealing anything else. It has been shown under standard cryptographic assumptions that non-interactive zero-knowledge proofs of membership exist for all languages in NP. However, known non-interactive zero-knowledge proofs of membership of NP-languages yield proofs that are larger than the corresponding membership witnesses. We investigate the question of minimizing the communication overhead involved in making non-interactive zero-knowledge proofs and show that if fully homomorphic encryption exists then it is possible to minimize the size of non-interactive zero-knowledge proofs and get proofs that are of the same size as the witnesses. Our technique is applicable to many types of non-interactive zero-knowledge proofs. We apply it to both standard non-interactive zero-knowledge proofs and to universally composable non-interactive zero-knowledge proofs. The technique can also be applied outside the realm of non-interactive zero-knowledge proofs, for instance to get witness-size interactive zero-knowledge proofs in the plain model without any setup. Keywords: Non-interactive zero-knowledge proofs, fully homomorphic encryption. 1
Non-interactive zero-knowledge (NIZK) proofs have enjoyed much interest in cryptography since they were introduced more than twenty years ago by Blum et al. [BFM88]. While quite useful when designing modular cryptographic schemes, until recently NIZK could be realized efficiently only using certain heuristics. However, such heuristic schemes have been widely criticized. In this work we focus on designing schemes which avoid them. In [GS08], Groth and Sahai presented the first efficient (and currently the only) NIZK proof system in the standard model. The construction is based on bilinear maps and is limited to languages of certain satisfiable system of equations. Given this expressibility limitation of the system of equations, we are interested in cryptographic primitives that are “compatible” with it. Equipped with such primitives and the Groth-Sahai proof system, we show how to construct cryptographic schemes efficiently in a modular fashion.
In this work, we describe properties required by any cryptographic scheme to mesh well with Groth-Sahai proofs. Towards this, we introduce the notion of “structure-preserving” cryptographic scheme. We present the first constant-size structure-preserving signature scheme for messages consisting of general bilinear group elements. This allows us (for the first time) to instantiate efficiently a modular construction of round-optimal blind signature based on the framework of Fischlin [Fis06].
Our structure-preserving homomorphic trapdoor commitment schemes yield the first efficient leakage-resilient signatures (in the bounded leakage model) which satisfy the standard security requirements and additionally tolerate any amount of leakage.
Furthermore, we build a structure-preserving encryption scheme which satisfies the standard CCA security requirements. While resembling the notion of verifiable encryption, it provides better properties and yields the first efficient two-party protocol for joint ciphertext computation. Note that the efficient realization of such a protocol was not previously possible even using the heuristics mentioned above.
Lastly, we revisit the notion of simulation extractability and define “true-simulation extractable” NIZK proofs. Although quite similar to the notion of simulation-sound extractable NIZK proofs, there is a subtle but rather important difference which makes it weaker and easier to instantiate efficiently. As it turns out, in many scenarios this new notion is sufficient.
One of the fundamental tenets of fiscal federalism is that, absent various sorts of externalities, decentralized governments that rely on own-source revenues should be more fiscally efficient than decentralized governments that rely on grant financing. The argument relies in part on the idea that sub-national governments, being closer to the people, are more accountable to its citizens. Accountability to citizens is also important in understanding the presence of corruption in government. This suggests that the financial structure and institutions of decentralized governments can potentially influence the degree and extent of corrupt activity. Financial structures that make governments more accountable should be associated with less corruption (other things equal), while financial structures with less accountability should be associated with more corrupt activities. We develop a simple model in which the use of grants rather than locally raised taxes increases corruption. We then use a panel data set of Mexican states to study the relationship between funding sources for Mexican states and the level of corruption in those states. We find that greater use of own tax revenues lowers corruption while greater use of grants increases corruption. This suggests that expenditure decentralization that is accompanied by revenue decentralization is likely to discourage corruption while expenditure decentralization that is funded by grants tends to encourage corruption. We also find that poverty, a measure of uninformed citizens, leads to greater corruption.
In climate change, as in other areas, recent years have produced a ‘Cambrian explosion’ of transnational institutions, standards, financing arrangements, and programs. As a result, climate governance has become complex, fragmented, and decentralized, operating without central coordination. Most studies of climate governance focus on inter state institutions. In contrast, I map a different realm of climate change governance: the diverse array of transnational schemes. I analyze this emerging system in terms of two theoretical frameworks developed to describe, explain, and evaluate complex governance arrangements—regime complex theory and polycentric governance theory—revealing fruitful avenues for positive and normative research. I conclude by arguing that the benefits of institutional complexity could be increased, and the costs reduced, through nonhierarchical ‘orchestration’ of climate change governance, in which international organizations or other appropriate authorities support and steer transnational schemes that further global public interests.
This paper investigates the relationships between urban highway construction and the decentralization of jobs and workers ’ residential locations by industry between 1960 and 2000. Estimates indicate each radial highway displaced 16 percent of central city working residents but only 6 percent of jobs to the suburbs. These estimates are fairly consistent across industry. Identification of these treatment effects relies on exogenous variation available from planned portions of the federal highway system. Viewed in the context of an urban spatial equilibrium model, these estimates indicate that agglomeration spillovers that operate as sub-metropolitan area spatial scales remain an important incentive for firms to cluster spatially in most industries, even in the face of transportation cost reductions. Moreover, such local spillovers represent a large fraction of overall agglomeration spillovers. Among one-digit industries, results indicate that finance, insurance &amp; real estate experiences the strongest productivity advantages of density and spatial centrality while wholesale &amp; retail trade experiences the smallest.
Imad Fakhri Taha Alshaikhli, Rusydi Hasan Makarin, Siti Khairunnisa Mohd Bakri, Nur Dalilah More Yusoff · 5 authors
Much of the current innovation in advanced materials is occurring at the nanoscale, specifically in manufactured nanomaterials (MNs). MNs display unique attributes and behaviors, and may be biologically and physically unique, making them valuable across a wide range of applications. However, as the number, diversity and complexity of MNs coming to market continue to grow, assessing their health and environmental risks with traditional animal testing approaches is too time- and cost-intensive to be practical, and is undesirable for ethical reasons. New approaches are needed that meet current requirements for regulatory risk assessment while reducing reliance on animal testing and enabling safer-by-design product development strategies to be implemented. The adverse outcome pathway (AOP) framework presents a sound model for the advancement of MN decision making. Yet, there are currently gaps in technical and policy aspects of AOPs that hinder the adoption and use for MN risk assessment and regulatory decision making. This review outlines the current status and next steps for the development and use of the AOP framework in decision making regarding the safety of MNs. Opportunities and challenges are identified concerning the advancement and adoption of AOPs as part of an integrated approach to testing and assessing (IATA) MNs, as are specific actions proposed to advance the development, use and acceptance of the AOP framework and associated testing strategies for MN risk assessment and decision making. The intention of this review is to reflect the views of a diversity of stakeholders including experts, researchers, policymakers, regulators, risk assessors and industry representatives on the current status, needs and requirements to facilitate the future use of AOPs in MN risk assessment. It incorporates the views and feedback of experts that participated in two workshops hosted as part of an Organization for Economic Cooperation and Development (OECD) Working Party on Manufactured Nanomaterials (WPMN) project titled, "Advancing AOP Development for Nanomaterial Risk Assessment and Categorization", as well as input from several EU-funded nanosafety research consortia.
Bernard Bashaasha, Margaret Najjingo Mangheni, Ephraim Nkonya
Uganda introduced the decentralization policy in 1997 under the Local Government Act of 1997 that has since undergone four amendments. The policy inherently decentralized service delivery institutions and their governance in order to improve access to services for the rural poor. Based on an analysis of available literature, the paper documents the state of knowledge regarding rural service provision in Uganda under decentralization and identifies knowledge gaps for further investigation. Its focus is on education, health, and agricultural advisory services, as well as the management of natural resources in Uganda. Although enlightening, a review of the broader decentralization literature is beyond the scope of this work. The analysis revealed that results in terms of attaining the objectives of decentralization are mixed. While as anticipated generally decentralization resulted in greater participation and control over service delivery and governance by local communities, local governments are still grappling with a range of challenges, namely, inadequate local financial resources and over-reliance on conditional central government grants; inability to attract and retain sufficient trained and experienced staff; corruption, nepotism, and elite capture. With regard to the specific services, while universal primary education (UPE) policy under the decentralization framework is credited with a dramatic increase in primary school enrollment, public primary education services are still dogged by concerns over financing, equity, quality, and the need for curriculum reform. Some studies show that there has been no improvement in health services with many health status indicators either stagnating or worsening. In general, decentralization of education and health services has not resulted in greater participation of the ordinary people and accountability of service providers to the community. Regarding agricultural extension and advisory services, except for areas serviced by NGOs, the majority of the country does not readily access extension services, because districts have been unable to prioritize the operational expenses. However, there is some evidence that the devolution of responsibility for natural resource management (NRM) has contributed to greater compliance with some NRM requirements in some areas while in other areas forest conditions have declined following decentralization. Generally, evidence on whether decentralization has improved service delivery in Uganda is still inconclusive, and more research is needed.
Claudia Dziobek, Carlos Alberto Gutierrez Mangas, Phebby Kufa
Conventional wisdom postulates that there are benefits from decentralizing government finances but there is little empirical evidence about actual country practices. This paper presents data on fiscal decentralization for about 80 countries over a period of about 20 years (1990 - 2008) from the IMF’s Government Finance Statistics Yearbook (GFSY), the only global database with fiscal data for several levels of government. The data show that in many countries, revenue collection remains relatively more centralized than expenditures and that employment tends to be concentrated in lower levels of government. Except for transition economies, the levels of decentralization are relatively stable over the time period. The findings are shown by degree of economic development, constitutional power arrangements, and geographic area, broadly confirming key factors identified in the literature as determining the extent of fiscal decentralization.