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Diversification, protection of liability holders and regulatory arbitrage
(2015)arXivWorking Paper -
Ownership and Control in Differentiated Product Markets
(2011)CEPR Discussion PapersWe study a differentiated product market in which an investor initially owns a controlling stake in one of two competing firms and may acquire a non-controlling or a controlling stake in a competitor, either directly using her own assets, or indirectly via the controlled firm. While industry profits are maximized within a symmetric two product monopoly, the investor attains this only in exceptional cases. Instead, she sometimes acquires ...Working Paper -
Advertising and Environmental Stewardship: Evidence from the BP Oil Spill
(2014)NBER Working Paper SeriesThis paper explores whether and how environmental stewardship can be provided by private markets through green advertising. We examine the period surrounding the BP oil spill and estimate how BP’s pre-spill investment in “green advertising” affected the spill’s impact on retail prices and demand at BP gasoline stations. We use station-level prices and sales from a large sample of U.S. retail gasoline stations, and market-level advertising ...Working Paper -
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Development and testing of scenarios for implementing Holocene LULC in Earth System Model Experiments
(2019)Geoscientific Model Development DiscussionsAnthropogenic changes in land use and land cover (LULC) during the pre-industrial Holocene could have affected regional and global climate. Current LULC scenarios are based on relatively simple assumptions and highly uncertain estimates of population changes through time. Archaeological and palaeoenvironmental reconstructions have the potential to refine these assumptions and estimates. The Past Global Changes (PAGES) LandCover6k initiative ...Working Paper -
Species-level microbial sequence classification is improved by source-environment information
(2019)bioRxivPopular naive Bayes taxonomic classifiers for amplicon sequences assume that all species in the reference database are equally likely to be observed. We demonstrate that classification accuracy degrades linearly with the degree to which that assumption is violated, and in practice it is always violated. By incorporating environment-specific taxonomic abundance information, we demonstrate that species-level resolution is attainable.Working Paper -
Revisiting microbe-metabolite interactions: doing better than random
(2019)bioRxivRecently, Quinn and Erb et al [1] made the case that when used correctly, correlation and proportionality can outperform MMvec when identifying microbe-metabolite interactions. We revisit this comparison and show that the proposed correlation and proportionality are outperformed by MMvec on real data due to their inability to deal with sparsity commonly observed in microbiome and metabolome datasets.Working Paper -
Scoping study on the history and current context of Climate and Energy Model Regions
(2016)LINKS Working PaperWorking Paper -
Taxes and the Location of Targets
(2012)Oxford University Centre for Business Taxation Working Paper SeriesThis paper uses firm-level data to investigate the impact of taxes on the international location of targets in M&A. In principle, a higher tax rate in the target’s country could make an acquisition there more likely, less likely, or have no effect at all. We combine financial and ownership data for companies in ORBIS in 2005 with domestic and cross-border acquisitions in ZEPHYR between 2006 and 2008. We estimate a random parameters form ...Working Paper -
Design of Admissible Heuristics for Kinodynamic Motion Planning via Sum-of-squares Programming
(2016)arXivWorking Paper