The role of location and contracts in firm governance and labor: an examination of the US coal industry

This dissertation explores empirically how external factors can influence the organizational structure of firms and how the structure a firm chooses can affect worker outcomes. The first chapter examines how a policy reform affected the organizational choices of firms. The MINER Act of 2006 resulted in increased scrutiny and penalties for underground coal mining operations relative to surface operations. In turn, this changed the incentives for coal preparation facilities to own these mines. Particularly, markets most affected by the reform saw an increase in ownership along an extensive margin and markets already integrated saw a decrease along an intensive margin. I argue these results reflect the competing incentives created by the policy. The increased riskiness of shut downs and flows in production resulted in preparation plants integrating with at least one mine to assure a basic level of supply. The increased regulatory liability of ownership induced by the new regulatory structure resulted in a countervailing force, reducing the intensity of integration in markets that were integrated prior to the reform. The second chapter (with David Weil) studies the prevalence of contractor utilization in the mining industry. Outsourcing of tasks has increased significantly in the underground coal mining industry over the last two decades. We hypothesize that the market and organizational incentives facing contractors increase the likelihood of injuries and fatalities to their workforce. Our results suggest increased risk exposure for mines with high contractor utilization. These findings have important implications for enforcement and public policies and extend the evidence of the adverse impact of forms of subcontracting on health and safety to the mining sector. Finally, the third chapter provides a case study of two major actors in the industry, Alpha Natural Resources and Massey Energy Company. It looks at the ownership choices the two companies have made in the past decade. Looking at these different decisions allows for the identification of contract operations that are of concern from a regulatory standpoint in this industry. This paper provides a blueprint for future research in determining the prevalence of these particular contracting arrangements in US coal mining

NIOSH Mining Program: Evidence Package for 2008-2018

This document contains materials to demonstrate the relevance and impact of the Mining Program\u2019s work in the areas of disaster preparedness and response, ground control, and respirable hazards

Thermal effects on geologic carbon storage

The final publication is available at Springer via http://dx.doi.org/10.1016/j.earscirev.2016.12.011One of the most promising ways to significantly reduce greenhouse gases emissions, while carbon-free energy sources are developed, is Carbon Capture and Storage (CCS). Non-isothermal effects play a major role in all stages of CCS. In this paper, we review the literature on thermal effects related to CCS, which is receiving an increasing interest as a result of the awareness that the comprehension of non-isothermal processes is crucial for a successful deployment of CCS projects. We start by reviewing CO2 transport, which connects the regions where CO2 is captured with suitable geostorage sites. The optimal conditions for CO2 transport, both onshore (through pipelines) and offshore (through pipelines or ships), are such that CO2 stays in liquid state. To minimize costs, CO2 should ideally be injected at the wellhead in similar pressure and temperature conditions as it is delivered by transport. To optimize the injection conditions, coupled wellbore and reservoir simulators that solve the strongly non-linear problem of CO2 pressure, temperature and density within the wellbore and non-isothermal two-phase flow within the storage formation have been developed. CO2 in its way down the injection well heats up due to compression and friction at a lower rate than the geothermal gradient, and thus, reaches the storage formation at a lower temperature than that of the rock. Inside the storage formation, CO2 injection induces temperature changes due to the advection of the cool injected CO2, the Joule-Thomson cooling effect, endothermic water vaporization and exothermic CO2 dissolution. These thermal effects lead to thermo-hydro-mechanical-chemical coupled processes with non-trivial interpretations. These coupled processes also play a relevant role in “Utilization” options that may provide an added value to the injected CO2, such as Enhanced Oil Recovery (EOR), Enhanced Coal Bed Methane (ECBM) and geothermal energy extraction combined with CO2 storage. If the injected CO2 leaks through faults, the caprock or wellbores, strong cooling will occur due to the expansion of CO2 as pressure decreases with depth. Finally, we conclude by identifying research gaps and challenges of thermal effects related to CCS.Peer ReviewedPostprint (author's final draft

Operationalising learning from rare events: framework for middle humanitarian operations managers

The purpose of this paper is to investigate the learning from rare events and the knowledge management processinvolved, which presents a significant challenge to many organizations. This is primarily attributed to the inability tointerpret these events in a systematic and “rich” manner, which this paper seeks to address. We start by summarizing therelevant literature on humanitarian operations management (HOM), outlining the evolution of the socio-technical disasterlifecycle and its relationship with humanitarian operations, using a supply chain resilience theoretical lens. We then out-line theories of organizational learning (and unlearning) from disasters and the impact on humanitarian operations. Subse-quently, we theorize the role of middle managers in humanitarian operations, which is the main focus of our paper. Themain methodology incorporates a hybrid of two techniques for root cause analysis, applied to two related case studies.The cases were specifically selected as, despite occurring twenty years apart, there are many similarities in the chain ofcausation and supporting factors, potentially suggesting that adequate learning from experience and failures is not occur-ring. This provides a novel learning experience within the HOM paradigm. Hence, the proposed approach is based on amultilevel structure that facilitates the operationalization of learning from rare events in humanitarian operations. Theresults show that we are able to provide an environment for multiple interpretations and effective learning, with emphasison middle managers within a humanitarian operations and crisis/disaster management context