Opportunities and competition in thick labor markets: Evidence from plant closures

Since Marshall (1890), it has been widely held in urban economic theory that cities insure workers against the risk of unemployment by offering a larger pool of potential jobs. Using a large administrative panel data set on workers displaced as a result of plant closures, we examine whether positive effects from a higher urban job density are offset by more intense competition between workers. When controlling for the sorting of workers between regions, we find robust evidence that the effect of job competition on unemployment duration exceeds that of job opportunities in absolute value. Our results put the idea of urban risk-sharing into perspective and provide an explanation for observed longer unemployment durations in cities.     

Counting Carbon: Calculative Activism and Slippery Infrastructure

The environmental movement in the global North is in a state of impasse. It appears that despite the renewed international focus on climate change, and the actions of innumerable social movements, a “solution” to the problem appears as one, without a viable solution. It is the contention of this paper that climate change has no clearly viable solution as it is a seemingly impossible problem. This paper investigates how the problem of climate change is constructed as a global object of political action and how it functions to render politics into a matter of calculative action, one that seeks—but fails—to take hold of a slippery carbon infrastructure. It concludes by suggesting one possible solution to this dilemma is to turn away from the global scalar logic of climate change and towards a situated focus on questions of infrastructure, or what Dimitris Papadopoulos calls “thick justice”.     

The Ethics Minefield: Issues of responsibility in learning and research

Google Glass was deployed in an Urban Studies field course to gather videographic data for team-based student research projects. We evaluate the potential for wearable computing technology such as Glass, in combination with other mobile computing devices, to enhance reflexive research skills, and videography in particular, during field research. The utility as well as the limitations of Google Glass are discussed, including its actual and potential application for teaching and data gathering purposes in the field. As such, this article constitutes one of the first instances of evaluating Google Glass as a social science research tool.     

Reading back from Experimental Painting

ABSTRACT

My book, Experimental Painting (1970), was the product of a decade of coming to terms with the history of modern art and with contemporary manifestations of the avantgarde. While at Cambridge from 1960 to 1967, I published art criticism, initially in locally published magazines, and then went on to review art exhibitions both nationally and internationally. This led to being co-editor of Form, which produced further opportunities. The term ‘experimental’ that I adopted in 1970 was intended to suggest the paradigm of scientific discovery which suited some, if not all, of the artists I studied. This article considers concepts directly imported from contemporary scientific enquiry that seemed relevant to me at the time, notably those from experimental psychology, psychoanalysis and structural linguistics. I relate them to the character of intellectual life at Cambridge in a period which saw much debate about the relationship between Sciences and Humanities as ‘Two Cultures’.     

Quantitative estimation of overpressure caused by gas generation and application to the Baiyun Depression in the Pearl River Mouth Basin,South China Sea

Hydrocarbon generation can yield high fluid pressures in sedimentary basins as the conversion of solid kerogen to hydrocarbons can result in an increase in fluid volume. To quantify the relationship between gas generation and overpressure in source rocks, a set of equations for computing the pressure change due to gas generation has been derived. Those equations can be used to quantitatively estimate overpressure generated by type III kerogen in source rocks by considering gas generation and leakage, gas dissolution in formation water and residual oil, thermal cracking of oil to gas, and hydrocarbon episodic expulsion from source rocks. The equations also take consideration of other factors including source rock porosity, transformation ratio, total organic carbon (TOC), hydrogen index, and compressibility of kerogen, oil, and water. As both oil and gas are taken into account in the equations, they can also be used to estimate the evolution of overpressure caused by hydrocarbon generation of type I and type II kerogen source rocks. Sensitivity analyses on the type III kerogen source rock indicate that hydrogen index is the most influential parameter for overpressure generation, while TOC and residual gas coefficient (β: ratio of residual gas over the total gas generated) have a moderate effect. Overpressure can be generated even if the gas leakage/loss in the source rock is up to 80% of the total gas generated. This suggests that the internal pressure seal of the source rock is not a critical factor on the pressure change as long as the source rocks are capable of sealing liquid oil. The equations were applied to evaluate the overpressure in the Eocene–Oligocene Enping Formation source rocks due to hydrocarbon generation in the Baiyun Depression, the Pearl River Mouth Basin by considering the source rock properties, hydrocarbon generation history, and hydrocarbon expulsion timing. Two episodes of overpressure development due to gas generation and release were modeled to have occurred in the Enping Formation source rock since 16 Ma. The overpressure release at 10.2–5.3 Ma via hydrocarbon expulsion was apparently related to the Dongsha phase of tectonic deformation, whereas the pressure release at 2–0 Ma was due to pressure generation that was exceeded the fracture‐sealing pressure in the source rocks.     

The Role of Personal Factors in the Location Decision of Software Services Start-up Firms

This paper explores the factors which influence the business location decisions of start-ups, focusing in particular on the role of personal factors. Established explanations of industry location emphasize proximity to firms in the same or related industries and proximity to a wider set of business services, though recent research suggests that personal factors may play an important role in explanations of industry location—particularly in technology-enabled sectors. A survey of 97 new firms, founded between 2008 and 2012, in the Irish software services sector, shows that the business location decision is influenced by the personal motivation of entrepreneurs to attain a desired quality of life, and that this outweighs economic factors such as proximity to firms within the same or related industries, proximity to a broader set of supporting business services, infrastructure or the availability of government support schemes. Personal factors are particularly important to firms located outside the Dublin metropolitan area and to home-based businesses. This has important policy implications for national and regional governments seeking to encourage entrepreneurship in technology-enabled service sectors.     

Simulating archaeologists? Using agent-based modelling to improve battlefield excavations

The study of material culture generated by military engagements has created an emergent sub-discipline of archaeological studies centred on battlefields. This approach has developed a particular and sophisticated methodology that is able to deal with the fact that archaeologists will often not find either structures or a useful stratigraphical record on the site, as the material remains of the battle will basically be metallic objects carried by combatants. It is therefore rather complicated not only to test hypotheses about battle events based on archaeological data, but also to validate the methodology used. Here we propose the use of agent-based models to explore these issues in the case of eighteenth-century battlefield archaeology. The simulation is divided into four different steps. Firstly, a battle is simulated in order to generate realistic virtual archaeological remains left by an engagement between two armies of this era. We then simulate the loss of information that the passing of time produces in the battlefield. The third step involves simulating the archaeological survey, enabling us to explore different survey strategies and the impact on the interpretation of the event itself. Finally, we design a confidence index in order to compare the results of the different virtual excavations using spatial analysis and statistics. The results show that the methodology is fully functional in terms of understanding a battle, and it allows us to suggest new strategies to improve fieldwork and to develop new ways of exploring these particular archaeological sites. It is concluded that the described approach illustrates how simulation can be used to explore methodological issues of archaeological science.     

Shedding light on the Cypriot rural landscape: Investigations of the Athienou Archaeological Project in the Malloura Valley,Cyprus, 2011–2013

Abstract

Since its inception in 1990, the Athienou Archaeological Project (AAP) has focused on diachronic patterns of rural land use within the Malloura Valley located along the edges of Cyprus’s fertile Mesaoria plain. Employing careful field methods of excavation and recording, members of AAP have sought to reconstruct ancient life in this understudied region by charting local responses to regional and pan-Mediterranean networks of exchange. The present contribution reports on the results of excavations (2011–2013) in the Geometric to Roman period rural sanctuary and of limited pedestrian survey (2013) in light of the project’s research goals, while highlighting AAP’s effective implementation of a mobile computing platform that streamlined field recording through an increased reliance on born-digital data. For a discussion of AAP’s mobile computing platform in the context of our fieldwork in Cyprus, please see our online supplementary article on the JFA website (http://www.maneyonline.com/doi/suppl/10.1179/0093469015Z.000000000112).     

Children's agency in resettlement: a study of Swedish cultural orientation programs in Kenya and Sudan

The focus of this study is cultural orientation programs (COPs) for refugees being resettled from Kenya and Sudan in Sweden in 2011. This study aims to highlight how, if at all, children's agency was facilitated during the COPs. The programs were video recorded in order to look at the continuous negotiations during the meetings between the Swedish delegation and the children and youth. The concept of thick and thin agency is used in order to understand how sometimes the overall context of the program as a part of the resettlement process thins the agency of the children.