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Environmental Policy and Directed Technological Change: Evidence from the European Carbon Market

This paper investigates the impact of the European Union Emissions Trading System (EU ETS) on technological change, exploiting installations level inclusion criteria to estimate…

March 1, 2016

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In the Press

Are monarch butterflies really being massacred? A new study says it’s a lot more complicated than it seems

Thanks to pesticide use, habitat loss and climate change, Monarch butterflies are in mortal peril. Or so we have always.…

August 5, 2015

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Monarch butterfly studies tell a perplexing tale

The confusing picture emerges from seven monarch studies published this week in the Annals of the Entomological Society of. …

August 5, 2015

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A call for full annual cycle research in animal ecology

For vertebrates, annual cycles are organized into a series of breeding and non-breeding periods that vary in duration and location but are inextricably linked biologically. Here,…

August 1, 2015

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In the Press

Is the Anthropocene Upon Us?

We are in a new geological age, denoted by human beings’ impact on the earth. Does framing our present in this way demonstrate fatalist acceptance or mark us with remarkable…

March 5, 2015

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The impact of free-ranging domestic cats on wildlife of the United States

2013 Loss, Will, and Marra study suggests that free-ranging cats cause substantially greater wildlife mortality than previously thought and are likely the single greatest source…

January 29, 2013

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In the Press

Georgetown University Receives $20 Million Gift for Environment Initiative

Georgetown University has announced an anonymous $20 million gift to launch the Georgetown Environment Initiative, a multi-campus effort to advance the interdisciplinary study of…

November 7, 2012

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Conserving migratory land birds in the New World: Do we know enough?

This 2010 study with co-author Peter Marra discusses the knowledge gaps in the study of annual bird. …

March 1, 2010

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Optimal Conservation of Migratory Species

2007 study with co-author Peter Marra analyzes the utility and efficiency of current conservation efforts for migratory. …

August 15, 2007

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West Nile virus emergence and large-scale declines of North American bird populations

This 2007 article in Nature, coauthored by Dr. Marra, demonstrates the potential impacts of an invasive species on a diverse faunal assemblage across broad geographical scales,…

May 16, 2007