London School of Economics and Political Science

About: London School of Economics and Political Science is a education organization based out in London, United Kingdom. It is known for research contribution in the topics: Population & Politics. The organization has 8759 authors who have published 35017 publications receiving 1436302 citations.

Comparative effectiveness of exercise and drug interventions on mortality outcomes: metaepidemiological study

Abstract: Objective To determine the comparative effectiveness of exercise versus drug interventions on mortality outcomes. Design Metaepidemiological study. Eligibility criteria Meta-analyses of randomised controlled trials with mortality outcomes comparing the effectiveness of exercise and drug interventions with each other or with control (placebo or usual care). Data sources Medline and Cochrane Database of Systematic Reviews, May 2013. Main outcome measure Mortality. Data synthesis We combined study level death outcomes from exercise and drug trials using random effects network meta-analysis. Results We included 16 (four exercise and 12 drug) meta-analyses. Incorporating an additional three recent exercise trials, our review collectively included 305 randomised controlled trials with 339 274 participants. Across all four conditions with evidence on the effectiveness of exercise on mortality outcomes (secondary prevention of coronary heart disease, rehabilitation of stroke, treatment of heart failure, prevention of diabetes), 14 716 participants were randomised to physical activity interventions in 57 trials. No statistically detectable differences were evident between exercise and drug interventions in the secondary prevention of coronary heart disease and prediabetes. Physical activity interventions were more effective than drug treatment among patients with stroke (odds ratios, exercise v anticoagulants 0.09, 95% credible intervals 0.01 to 0.70 and exercise v antiplatelets 0.10, 0.01 to 0.62). Diuretics were more effective than exercise in heart failure (exercise v diuretics 4.11, 1.17 to 24.76). Inconsistency between direct and indirect comparisons was not significant. Conclusions Although limited in quantity, existing randomised trial evidence on exercise interventions suggests that exercise and many drug interventions are often potentially similar in terms of their mortality benefits in the secondary prevention of coronary heart disease, rehabilitation after stroke, treatment of heart failure, and prevention of diabetes.

The Law and Economics of Self-Dealing

Abstract: We present a new measure of legal protection of minority shareholders against expropriation by corporate insiders: the anti-self-dealing index. Assembled with the help of Lex Mundi law firms, the index is calculated for 72 countries based on legal rules prevailing in 2003, and focuses on private enforcement mechanisms, such as disclosure, approval, and litigation, governing a specific self-dealing transaction. This theoretically-grounded index predicts a variety of stock market outcomes, and generally works better than the commonly used index of anti-director rights.

Between Development and Social Policies: The Impact of European Structural Funds in Objective 1 Regions

Abstract: Rodriguez-Pose A. and Fratesi U. (2004) Between development and social policies: the impact of European Structural Funds in Objective 1 regions, Reg. Studies 38, 97–113. European regional support has grown in parallel with European integration. The funds targeted at achieving greater economic and social cohesion and reducing disparities within the European Union (EU) have more than doubled in relative terms since the end of the 1980s, making development policies the second most important policy area in the EU. The majority of the development funds have been earmarked for Objective 1 regions, i.e. regions where GDP per capita is below the 75% threshold of the EU average. However, the European development policies have come under increasing criticism based on two facts: the lack of upward mobility of assisted regions; and the absence of regional convergence. This paper assesses, using cross-sectional and panel data analyses, the failure so far of European development policies to fulfil their objective of de...

Towards a Paradigm for Research on Social Representations

Abstract: Based on Moscovici’s (1961) classical study on the cultivation of psychoanalytic ideas in France in the 1950’s and our own research on modern biotechnology, we propose a paradigm for researching social representations. Following a consideration of the nature of representations and of the ‘iconoclastic suspicion’ that haunts them, we propose a model of the emergence of meaning relating three elements: subjects, objects, and projects. The basic unit of analysis is the elongated triangle of mediation (SOPS): subject 1, object, project, and subject 2, captured in the image of a ‘Toblerone’. Such social units cultivate, that is produce, circulate and receive representation which may be embodied in four modes–habitual behaviour, individual cognition, informal communication and formal communication–and in three mediums–words, visual images or non-linguistic sounds. We propose an operational definition of a ‘social representation’ as the comparison of four characteristics of communication systems: the content structures (anchorings and objectifications; core and peripheral elements), the typified processes (diffusion, propagation, propaganda etc.), and their functions (identity, attitude, opinion, resistance, ideology etc.), within the context of segmented social milieus. Seven implications for research on social representations are outlined: (1) content and process; (2) segmentation by social milieus rather than taxonomies; (3) cultivation studies within social milieus; (4) multi-method (mode and medium) analysis; (5) time structures and longitudinal data; (6) the crossover of cultural projects and trajectories; (7) the disinterested research attitude. This ideal type paradigm leads to an operational clarification to identify new research questions, and to guide the design and evaluation of studies on social representations.

Social Preferences and the Response to Incentives: Evidence from Personnel Data

Abstract: We present evidence on whether workers have social preferences by comparing workers' productivity under relative incentives, where individual effort imposes a negative externality on others, with their productivity under piece rates, where it does not. We find that the productivity of the average worker is at least 50 percent higher under piece rates than under relative incentives. We show that this is due to workers partially internalizing the negative externality their effort imposes on others under relative incentives, especially when working alongside their friends. Under piece rates, the relationship among workers does not affect productivity. Further analysis reveals that workers internalize the externality only when they can monitor others and be monitored. This rules out pure altruism as the underlying motive of workers' behavior.