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Public Opinion Toward Hydraulic Fracturing: The Effect of Beyond Compliance and Voluntary Third-Party Certification
No full textA survey with an embedded experiment was conducted to test how residents would respond to a commitment by oil and natural gas producers to conduct nearby fracking operations in a manner that is more protective of health and the environment than existing state and federal regulations. The experiment specifically assessed how the use of independent third-party certification of operations coupled with "beyond compliance" practices would influence local public support for oil and gas development. The state of Colorado was chosen due to its long history of oil and gas development, its leadership amongst states in advancing fracking, and the current local-level conflicts surrounding oil and gas development. A public opinion survey (N= 390) of a representative sample of Colorado residents found that "green certification" of a production company's activities led to substantially increased levels of support for a hypothetical nearby oil and natural gas project. Our findings suggest that oil and gas developers can obtain greater public support for their projects by voluntarily engaging in practices that are more protective than current state and federal regulations together with third-party certification of those practices. In effect, these coupled actions serve as a mechanism that promotes a firm's "social license to operate"
Waiting on the Courts: Effects of Policy Uncertainty on Pollution and Investment
No full textLegal challenges and transitions of political power cause the future of regulatory policies to be uncertain. In this article, I investigate how uncertainty about environmental policy aects investment and emissions at coal-red power plants. I exploit a legal challenge to the Clean Air Interstate Rule (CAIR) that created variation in the probability that individual plants would need to comply with the new policy. I use a dierence-in-dierences approach to compare pollution reductions at power plants located in states subject to more uncertainty to plants in states that that were not. I nd that plants with a lower probability of being regulated invested in fewer capital-intensive pollution controls and reduced pollution by 13% less on average. Many of these plants did switch to capitalintensive pollution controls aer the court upheld CAIR. Policy uncertainty increased compliance costs by $124 million by delaying ecient investments
Photothermal microspectroscopy with Bessel-Gauss beams and reflective objectives
No full textHere we investigate scanning photothermal microspectroscopic imaging of metal nanoparticles with reflective objectives. We show that correction-less collection of spectra from single spherical nanoparticles embedded in a polymer is possible over a wide spectral band, with large depth-of-focus, long working distance, and high lateral spatial resolution. We posit that these beneficial characteristics are inherent of the Bessel-Gauss character of the focused beam. When compared with other types of optical microscopy, the combination of these characteristics give photothermal imaging with reflective objectives an unique appeal for material characterization applications
Hydrologic and thermal conditions occupied by a species within a single watershed predict the geographic extent of occurrence of freshwater fishes
No full textHydrologic regimes and water temperatures are primary predictors of freshwater species occurrence. While these variables have been demonstrated to be important in regulating species diversity at particular locations, whether species occurrences across lotic habitats within a single, relatively small watershed can predict the full geographic extent of a species is unclear. We use river reach estimates of streamflow and water temperature derived from a watershed-scale hydrologic model, coupled with body size measures, to investigate whether the type and variability of thermal and hydrologic habitat used by fish species within the Mobile River Basin (MRB) can predict the overall geographic extent of occurrence (GEO) for these taxa. Locality data for 108 species of fishes within MRB, one of the most ecologically-diverse watersheds in the United States, were intersected with streamflow and water temperature estimates to characterize minimum and maximum streamflow and water temperature conditions and thermal breadth (range of thermal conditions) occupied by each species. Among all species, variation in GEO was associated with variation in thermal breadth and body size. Thermal variables were also important predictors of variation in GEO among Cyprinidae. Flow variables were important predictors of variation in GEO for Centrarchidae, Ictaluridae, and Percidae, and within Etheostoma and Percina. Results generally indicate that species with large body size, relatively broad thermal tolerances, or preference for relatively high discharge environments tend to exhibit broader distributions across North America, yet these relationships vary among taxonomic groups
The exemplar enigma: New venture image formation in an emergent organizational category
No full textWe examine the process of organizational image formation for new ventures entering an emerging organizational category. An emerging organizational category is usually initiated by a pioneering venture that adopts a new organizational form. If that venture garners early recognition, it serves as an exemplar, attracting other ventures to enter the emerging category. Those ventures then have to formulate an image that both accounts for and competes with that of the category exemplar. This article describes how ventures form their images in the face of this tension. We examine this tension using qualitative data from eight new U.S. venture accelerators entering the emergent venture accelerator category, which revealed that image formation in an emerging organizational category involves three basic considerations: (1) emulation, (2) experimentation, and (3) divergence. Through emulation, organizations observe and rely on the exemplar in order to capture legitimacy. Through experimentation, organizations consider who they are beyond the exemplar and how they might change. Through divergence, organizations definitively claim and establish a unique image. From this, a conceptual framework is proposed in which organizational and contextual factors influence image formation actions and decisions
Public Ideas: Their Varieties and Careers
Get PDFIn light of ongoing concerns about the relevance of scholarly activities, we ask, what are public ideas and how do they come to be? More specifically, how do journalists and other mediators between the academy and the public use social science ideas? How do the various uses of these ideas develop over time and shape the public careers of these ideas? How do these processes help us to understand public ideas and to identify their various types? In addressing these questions, we make the case for a sociology of public social science. Using data from newspaper articles that engage with seven of the most publicly prominent social science ideas over the last 30 years, we make three contributions. First, we advance a pragmatic, cultural approach to understanding public ideas, one that emphasizes fit-making processes and applicative flexibility. Second, we define public ideas: social science ideas become public ideas when they are used as objects of interest (being the news), are used as interpretants (making sense of the news), and ebb and flow between these uses as part of an unfolding career. Third, we construct a typology of public ideas that provides an architecture for future research on public social science
Air pollution exposures from multiple point sources and risk of incident chronic obstructive pulmonary disease (COPD) and asthma
No full textBackground. Exposure to environmental air pollutants exacerbates respiratory illness, but prospective studies of disease incidence are uncommon. Further, attempts to estimate effects from multiple point sources have rarely been undertaken. The current study examined risk of incident chronic obstructive pulmonary disease (COPD) and asthma in association with emissions of multiple air pollutants from point pollution sources in Australia. Methods. We analyzed prospective cohort data from the Australian Longitudinal Study on Women’s Health. Women from three age-cohorts (N=35,755) were followed for up to 21 years for incident COPD and asthma. Exposures were measured from the National Pollutant Inventory and included carbon monoxide, nitrogen oxides, sulfur dioxide, and particulate matter (PM2.5 and PM10). We identified inverse-distance weighted emissions in kilograms that women experienced over time from point sources within 10 kilometers of their residences. Cox proportional hazards regression models examined risk of self-reported doctor-diagnosed COPD and asthma in association with pollutant exposures and covariates. Results. New COPD cases numbered 3,616 (11.5%) and new asthma cases numbered 2,725 (9.4%). Participants were exposed to an average of 47 to 59 sites with air pollution emissions within 10 km of their residences. Fossil fuel electricity generation and mining made the largest contributions to air pollution but hundreds of other types of emissions also occurred. Controlling for covariates, all five air pollutants modeled individually were significantly associated with risk of COPD. Modeled jointly, only sulfur dioxide (SO2) remained significantly associated with COPD (HR=1.038, 95% CI=1.010-1.067), although the five pollutants were highly correlated (r=.89). None of the pollutants were significantly associated with adult onset asthma. Cohort-specific analyses indicated that COPD risk was significantly associated with SO2 exposure for younger (HR=1.021, CI=1.001-1.047), middle-age (HR=1.019, CI=1.004-1.034) and older cohorts (HR=1.025, CI=1.004-1.047). Conclusions. Multiple exposure sources and pollutants contributed to COPD risk, including electricity generation and mining but extending to many industrial processes. The results highlight the importance of policy efforts and technological improvements to reduce harmful air pollution emissions across the industrial landscape
Exposure to heavy metals from point pollution sources and risk of incident type 2 diabetes among women: a prospective cohort analysis
No full textHeavy metal exposures may contribute to diabetes risk but prospective studies are uncommon. We analyzed the Australian Longitudinal Study on Women’s Health (three cohorts aged 18-23, 45-50, or 70-75 at baseline in 1996, N=34,191) merged with emissions data for 10 heavy metals (As, Be, Co, Cr, Cu, Hg, Mn, Ni, Pb, Zn) from the National Pollutant Inventory. Over 20-year follow-up, 2,584 women (7.6%) reported incident diabetes. Cox proportional hazards regression models showed that women aged 45-50 at baseline had higher diabetes risk in association with exposure to total air emissions, total water emissions, all individual metals air emissions, and six individual water emissions. After correction for false discovery rate, nine of 11 air emissions and five water emissions remained significant. Associations were not observed for land-based emissions, or for younger or older cohorts. Emissions were dominated by mining, electricity generation and other metals-related industrial processes
Social dilemmas with manifest and unknown networks
Get PDFScholarly consensus that social ties resolve social dilemmas is largely predicated on common knowledge of networks. But what happens when people do not know all relevant social ties? Does network uncertainty translate into worse outcomes? I address these concerns by advancing the notion of a Network Estimation Bayesian Equilibrium (NEBE) to examine cooperative behavior under different epistemic conditions. When networks are common knowledge, I find that all possible outcomes of an original cooperation game can be realized in equilibrium, albeit with a higher likelihood of defection for more connected players. Variable knowledge of the network also has a distributional impact. With incomplete network knowledge, it’s possible to observe reversed equilibrium behavior when more connected players actually cooperate more often than less connected ones. In fact, aggregate network uncertainty in some social contexts incentivizes more mutual cooperation than would be the case with common knowledge of all social ties
Alkene Hydrosilylation on Oxide-supported Pt-ligand Single-site Catalysts
Get PDFHeterogeneous single-site catalysts (SSCs), widely regarded as promising next-generation catalysts, blend the easy recovery of traditional heterogeneous catalysts with desired features of homogeneous catalysts: high fraction of active sites and uniform metal centers. We previously reported the synthesis of Pt-ligand SSCs through a novel metal-ligand self-assembly method on MgO, CeO, and AlO supports (J. Catal. 2018, 365, 303-312). Here, we present their applications in the industrially-relevant alkene hydrosilylation reaction, with 95% yield achieved under mild conditions. As expected, they exhibit better metal utilization efficiency than traditional heterogeneous Pt catalysts. The comparison with commercial catalysts (Karstedt and Speier) reveals several advantages of these SSCs: higher selectivity, less colloidal Pt formation, less alkene isomerization/hydrogenation, and better tolerance towards functional groups in substrates. Despite some leaching, our catalysts exhibit satisfactory recyclability and the singlesite structure remains intact on oxide supports after reaction. Pt single-sites were proved to be the main active sites rather than colloidal Pt formed during the reaction. An induction period is observed in which Pt sites are activated by Cl detachment and replacement by reactant alkenes. The most active species likely involves temporary detachment of Pt from ligand or support. Catalytic performance of Pt SSCs is sensitive to the ligand and support choices, enabling fine tuning of Pt sites. This work highlights the application of heterogeneous SSCs created by the novel metal-ligand self-assembly strategy in an industrially-relevant reaction. It also offers a potential catalyst for future industrial hydrosilylation applications with several improvements over current commercial catalysts