Regulation issues in the Italian local transport system: aligning transactions and governance structures

This paper refers to the concept of public governance in the light of Transaction Cost Economics (TCE). While TCE is well developed and widely applied in the private sector, only a few studies have adopted such framework to investigate the provision of public services. We aim at pointing out the coherence between peculiar typologies of transactions and a given set of governance structures, within Local Public Transport systems. The core of the analysis is the alignment between characteristics of transactions and governance structures. The empirical section addresses these issues referring to three case studies, pointing out an articulated organizational configuration in terms of actors involved and governance structures adopted. The analysis shows an alignment between the choices underlying the design of the local transport system and the outcomes expected in terms of TCE.     

Early Labour Market Returns to College Subject

Abstract. We estimate early labour market outcomes of Italian university graduates across college subjects. We devote great attention to endogenous selection issues using alternative methods to control for potential self‐selection associated with the choice of the degree subject in order to unravel the causal link between college major and subsequent outcomes in the labour market. Our results suggest that ‘quantitative’ fields (i.e. Sciences, Engineering, and Economics) increase not only the speed of transition into the first job and employment probability but also early earnings, conditional on employment.     

Diesel Engine Exhaust and Lung Cancer Mortality: Time‐Related Factors in Exposure and Risk

To develop a quantitative exposure‐response relationship between concentrations and durations of inhaled diesel engine exhaust (DEE) and increases in lung cancer risks, we examined the role of temporal factors in modifying the estimated effects of exposure to DEE on lung cancer mortality and characterized risk by mine type in the Diesel Exhaust in Miners Study (DEMS) cohort, which followed 12,315 workers through December 1997. We analyzed the data using parametric functions based on concepts of multistage carcinogenesis to directly estimate the hazard functions associated with estimated exposure to a surrogate marker of DEE, respirable elemental carbon (REC). The REC‐associated risk of lung cancer mortality in DEMS is driven by increased risk in only one of four mine types (limestone), with statistically significant heterogeneity by mine type and no significant exposure‐response relationship after removal of the limestone mine workers. Temporal factors, such as duration of exposure, play an important role in determining the risk of lung cancer mortality following exposure to REC, and the relative risk declines after exposure to REC stops. There is evidence of effect modification of risk by attained age. The modifying impact of temporal factors and effect modification by age should be addressed in any quantitative risk assessment (QRA) of DEE. Until there is a better understanding of why the risk appears to be confined to a single mine type, data from DEMS cannot reliably be used for QRA.     

Chronic Effects of Air Pollution are Probably Overestimated

Inappropriate measures of exposure, including inadequate consideration of latency in the analysis of chronic effects of air pollution, may lead to overestimation of the impact of air pollution on health effects. A relatively simple way to check the plausibility of results on chronic effects of air pollution would be to report in parallel the smoking‐associated risks.     

Transparency in the European Bond Market

The European bond market is made up of many segments characterised by varying levels of liquidity and of pre- and post-trade transparency. The possibility of extending the transparency provisions envisioned in the Directive 2004/39/EC, disciplining the functioning of markets in financial instruments in Europe (MiFID), from the equity to the bond market is currently being discussed. This poses risks to the status quo through trading fragmentation and strong negotiating power of a few large dealers, particularly with respect to small retail investors. The main conclusion of the paper is that if MiFID transparency rules are to be extended to the bond market, this must be “real” transparency, meaning pre-trade dissemination of real-time executable prices and a transparent order book. Under current provisions, this kind of information is available if not directly to everybody, at least directly to dealers and indirectly to professional and retail clients through business-to-business electronic platforms.     

Protest avatars as memetic signifiers: political profile pictures and the construction of collective identity on social media in the 2011 protest wave

Protest avatars, digital images that act as collective symbols for protest movements, have been widely used by supporters of the 2011 protest wave, from Egypt to Spain and the United States. From photos of Egyptian martyr Khaled Said, to protest posters and multiple variations of Anonymous' mask, a great variety of images have been adopted as profile pictures by Internet users to express their support for various causes and protest movements and communicate it to all their Internet peers. In this article, I explore protest avatars as forms of identification of protest movements in a digital era. I argue that protest avatars can be described as ‘memetic signifiers’ because (a) they are marked by a vagueness and inclusivity that distinguishes them from traditional protest symbols and (b) lend themselves to be used as memes for viral diffusion on social networks. In adopting these icons, participants experience a collective fusion in an online crowd, whose gathering is manifested in the very ‘masking’ of participants behind protest avatars. These forms of collective identification, while powerful in the short term, can however prove quite volatile, with Internet users often discarding avatars with relative ease, raising the question whether they can provide durable foundational elements of contemporary social movements.     

Monte Carlo methods for nonparametric survival model determination

In the causal analysis of survival data a time-based response is related to a set of explanatory variables. Definition of the relation between the time and the covariates may become a difficult task, particularly in the preliminary stage, when the information is limited. Through a nonparametric approach, we propose to estimate the survival function allowing to evaluate the relative importance of each potential explanatory variable, in a simple and explanatory fashion. To achieve this aim, each of the explanatory variables is used to partition the observed survival times. The observations are assumed to be partially exchangeable according to such partition. We then consider, conditionally on each partition, a hierarchical nonparametric Bayesian model on the hazard functions. We define and compare different prior distribution for the hazard functions.     

CCTV oddity: archaeology and aesthetics of video surveillance

The paper narrates #OCTV – an art installation, performance and hacktivist project – the authors presented at the International Visual Sociology Association annual conference (Goldsmiths 2013). The installation used networked CCTV cameras and affordance of digital media to make surveillance space visible, beyond its representational value. It played with the co-constitution of the surveillance images through technologies, cultural practices, and ethics. The paper suggests the visual work of CCTV cameras is contextual to the specific configuration surveillance ecology takes. It proposes art projects as critical methodology for unpacking the social construction of the digital image. As a consequence, it recognises the challenges of using once-upon-a-time ethics forms with regards to ecologies of the visual. Instead, it suggests an ethical and political tension which should follow research ‘data’ during the lifetime of the project, and possibly in the ecologies yet to come.