Conscript Your Friends into Larger Anonymity Sets with JavaScript

We present the design and prototype implementation of ConScript, a framework for using JavaScript to allow casual Web users to participate in an anonymous communication system. When a Web user visits a cooperative Web site, the site serves a JavaScript application that instructs the browser to create and submit "dummy" messages into the anonymity system. Users who want to send non-dummy messages through the anonymity system use a browser plug-in to replace these dummy messages with real messages. Creating such conscripted anonymity sets can increase the anonymity set size available to users of remailer, e-voting, and verifiable shuffle-style anonymity systems. We outline ConScript's architecture, we address a number of potential attacks against ConScript, and we discuss the ethical issues related to deploying such a system. Our implementation results demonstrate the practicality of ConScript: a workstation running our ConScript prototype JavaScript client generates a dummy message for a mix-net in 81 milliseconds and it generates a dummy message for a DoS-resistant DC-net in 156 milliseconds.Comment: An abbreviated version of this paper will appear at the WPES 2013 worksho

Gain or Pain: Does Consumer Activity Reflect Utility Maximisation?

Competition Authorities are introducing new informational remedies to help consumers search and switch more actively. Using a specially commissioned data set, and unique direct estimates of the gains, search and switching time which consumers anticipate, we examine the determinants of consumer activity in eight markets. We find that expected costs (and to some extent gains) do influence consumers as a utility maximising model would predict; but that their role is small, and other factors, particularly experience of switching in other markets, are also influential. We conclude that consumers’ confidence in their own estimates is crucial in encouraging market activity

Allocative efficiency measurement revisited: do we really need input prices?

The traditional approach to measuring allocative efficiency is based on input prices, which are rarely known at the firm level. This paper proposes a new approach to measure allocative efficiency which is based on the output-oriented distance to the frontier in a profit - technical efficiency space - and which does not require information on input prices. To validate the new approach, we perform a Monte-Carlo experiment which provides evidence that the estimates of the new and the traditional approach are highly correlated. Finally, as an illustration, we apply the new approach to a sample of about 900 enterprises from the chemical industry in Germany. --Allocative efficiency,data envelopment analysis,frontier analysis,technical efficiency,Monte-Carlo study,chemical industry

Transit-Oriented Development in the Chicago Region: Efficient and Resilient Communities for the 21st Century

In this report CNT researchers evaluated the dynamics of the Chicago Region's 367 fixed Metra and CTA rail stations and station areas between 2000 and 2010. Using the National TOD Database, a first-of-its-kind web tool developed by CNT that provides access to comprehensive information about more than 4,000 transit zones across the United States, researchers identified the transit zones that performed well: those that anchored vital, walkable communities that possess an affordable, high quality of life with minimal impact on the environment. While Chicago made significant investments in TOD during that time period, researchers found that peer cities (based on extensive transit system size) had more successful development of transit zones. Six case studies. Five recommendations

At Home and Abroad: An Empirical Analysis of Innovation and Diffusion in Energy-Efficient Technologies

This paper contributes to the induced innovation literature by extending the analysis of supply and demand determinants of innovation in energy-efficient technologies to account for international knowledge flows and spillovers. In the first part of the paper we select a sample of 38 innovating countries and we study how knowledge related to energy-efficient technologies flows across geographical and technological space. We demonstrate that higher geographical and technological distances are associated with a lower probability of knowledge flow. In the second part of the paper, we use our previous estimates to construct stocks of internal and external knowledge for a panel of 17 countries and present an econometric analysis of the supply and demand determinants of innovation accounting for international knowledge spillovers. Our results confirm the role of demand-pull effects, as proxied by energy prices, as well as that of technological opportunity, as proxied by the knowledge stocks. In particular, this paper provides evidence that spillovers between countries have a significant positive impact on further innovation in energy-efficient technologies.Innovation, Technology Diffusion, Knowledge Spillovers, Energy-Efficient Technologies

The internationalization profiles of Portuguese SMEs

Given the (increasing) view point that firms’ internationalization strategy is the unique path to overcome the Portuguese dismissal economic growth, the present paper offers a comprehensive picture of the internationalization behavior of Portuguese SME, constituting therefore an important tool for political action. On the basis of the literature review and the factorial and cluster analyses performed, we propose three main segmentation criteria, one (‘Whole encompassing segmentation’: Experienced Medium Low-Tech firms; Low skill, Low-Tech firms; Young High-Tech firms) based on language skills, SME business experience, foreign market dependency, introduction of organizational innovation, exporting to ‘High income countries’ and education level of executive teams. The second segmentation proposal (‘Intermediate segmentation’: Young small-sized firms; Young micro-sized firms; Mature small-sized firms; Young medium-sized firms; Mature medium-sized firms; Foreign equity firms; Highly productive firms) has as criteria the firm size, the SME export intensity and industry. The last segmentation proposal (‘Parsimonious segmentation’: Medium-sized firms; Small-sized manufacturing firms; Micro-sized firms; Non-manufacturing small-sized firms; Export active small-sized firms; Potential exporters; Promising exporters firms) is based on SME size, business experience, foreign capital presence, and average productivity. Given the need for a parsimonius segmentation criterion, we convey that the most adequate segmentation criterion is the one combining SME size, export intensity and industry. This restricted number of criteria does not, however, affect the quality of the proposed SME segmentation, and has the advantage of being stasticaly adequate and user/cost friendly.Internationalization performance determinants, Portugal, Segmentation, SME

Valuing water for Chinese industries : a marginal productivity assessment

Using plant-level data on more than 1000 Chinese industrial plants, the authors estimate a production function treating capital, labor, water, and raw material as inputs to industrial production. They then estimate the marginal productivity of water based on the estimated production function. Using the marginal productivity approach to valuing water for industrial use, they also derive a model and estimates for the price elasticity of water use by Chinese industries. Previous studies used water demand functions and total cost functions to estimate firms'willingness to pay for water use. They find that the marginal productivity of water varies among sectors in China, with an industry average of 2.5 yuan per cubic meter of water. The average price elasticity of industrial water demand is about -1.0, suggesting a great potential for the Chinese government to use pricing policies to encourage water conservation in the industrial sector. Increasing water prices would reduce water use substantially.WaterConservation,Environmental Economics&Policies,Decentralization,Water and Industry,Economic Theory&Research,Water and Industry,Water Supply and Sanitation Governance and Institutions,Town Water Supply and Sanitation,Environmental Economics&Policies,Water Conservation

National Systems of Innovation and Entrepreneurship: In Search of a Missing Link

The literature on national systems of innovation (NIS) has neglected the issue of entrepreneurship because of several incompatibilities between the two notions. The Schumpeterian legacy, the current person-centric view of entrepreneurship, and methodological problems related to treating entrepreneurship at the macro-level, have made it difficult to integrate entrepreneurship into the NIS perspective. At national level it is more appropriate to treat entrepreneurship as a 'property' (dimension) of NIS. In order to link NIS and entrepreneurship we must establish a common conceptual basis. Our argument is that the functional view of NIS and entrepreneurship presents a common basis for such an approach. We develop criteria for the entrepreneurial NIS which we define as being those that can change balance between individual and cooperative entrepreneurship; that enhance both the opportunity and skill aspects of entrepreneurship; and that can balance generation of uncertainty with support to business models and other organisations which pool uncertainty. From the NIS perspective, we explain entrepreneurship as a systemic phenomenon driven by complementarities between technological, market and institutional opportunities. This framework builds on three research traditions in the entrepreneurship/NIS literature (Schumpeterian, Kirznerian and Listian) which jointly form a multi-level, multi-dimensional framework for understanding entrepreneurship from a NIS perspective. This framework could be useful as a heuristic for empirical research on entrepreneurship. Finally, we analyse policies for entrepreneurship and find that they are highly dependent on underlying and previously discussed conceptions of entrepreneurship

Fear of floating and fear of pegging: An empirical anaysis of de facto exchange rate regimes in developing countries

This paper uses a panel probit model with simultaneous equations to explain the joint determination of de facto and de jure exchange rate regimes in developing countries since 1980. We also derive an ordered-choice panel probit model to explain the causes of discrepancies between the two regime choices. Both models are estimated using simulation-based maximum likelihood methodsl. The results of the simultaneous equations model suggest that the two regime choices are dependent of each other and exhibit considerable state dependence. The ordered probit model provides evidence that regime discrepancies reflect an error-correction mechanism, and the discrepancies are persistent over time. --de facto exchange rate regimes,developing countries,simultaneous equations model,simulated maximum likelihood