This report empirically examines the determinants of private participation in flood mitigation programs that use a payment for ecosystem services (PES) framework and suggests improved PES program designs and enhancements to their flood mitigation effectiveness. It offers evidence suggesting income from farming and potential participants' past experiences with PES programs may increase participation in programs aiming to mitigate flooding and that in turn could reduce economic damages from flooding impacts.

We provide the first global assessment of the status of preferential access areas (PAAs), a relatively understudied policy tool to govern small-scale fisheries. We find 44 countries, most of them of low or low-middle income, have established a total of 63 PAAs encompassing 3% of continental shelf area worldwide.

The goal of this research is to understand the implications of using nature-based solutions, or natural infrastructure (NI), to mitigate the impacts of flooding. The two solutions I evaluate to supply NI are a program that financially incentivizes its supply by private landowners, and a government-run floodplain property acquisition program. This dissertation consists of three papers examining payments for ecosystem services (PES) programs in terms of enrollment, incentives, and outcomes. 

The United States has increasingly relied on government-administered floodplain buyout programs to reduce flood risk and remove flood-damaged dwellings from floodplains. However, high transaction costs and long administrative timelines dramatically hamper buyout program efficiency. This report derives financial efficiency thresholds suggesting situational advantages to both private- and government-run buyout programs and also evaluates alternative institutional structures for implementing buyouts and novel mechanisms for financing buyouts

In the first annual update of Annual Trends in Plastics Policy, Nicholas Institute researchers find that plastics policy enactment continues to surge and was not negatively affected by the COVID-19 pandemic. To better gauge policy implementation, researchers established a new effectiveness policy library to accompany the 2022 update. These studies indicate that, while underused in existing policy, greater governmental use of economic instruments (e.g., taxes, fees, levies) and information instruments (e.g., awareness campaigns to communicate other instruments to the public, education initiatives, etc.) would aid in enacting effective policies in the future.

In a study published by the journal One Earth, Duke experts share findings from an examination of the types of commitments that corporations have made to address global plastic pollution. The authors find that, rather than tackle virgin plastics, most companies target packaging and general plastics and frequently emphasize recycling-related efforts. While many large and important companies are making commitments, significantly more efforts beyond plastic recycling are required to effectively address plastic pollution challenges.

Governments worldwide are increasingly adopting public policies, laws, and ordinances to reduce plastic pollution. To date, studies have not analyzed the content of, and trends in, these policies. Employing a content analysis and literature search, we set out to better understand: (i) governments responses to this problem over time, and (ii) the state of the available evidence on the effectiveness of policy responses.

Large-scale fishing effort in the waters of tropical and lower income countries is predominantly driven by ‘distant water fishing fleets’ often owned by companies based in a small number of countries and has been associated with a range of negative environmental and social outcomes. West Africa is an example where such fleets are a dominant feature. In the waters of Guinea-Bissau, Guinea, Sierra Leone, Liberia and Ghana, 75% of all licensed bottom trawl vessels in 2017 either registered (‘flagged’) or largely owned in China.

Ocean conservation and sustainable use cannot be pursued or achieved without consideration of the planetary impacts of climate change, and particularly the role of the oceans in both mitigation and adaptation. For this reason, the international community has increasingly committed to providing aid to help finance public goods for ocean conservation and climate action. Although many organizations have set up mechanisms to track both aid and climate finance, such trackers are usually not focused on financial flows related to ocean conservation and climate action.

Over the last two decades, efforts to combat illegal, unreported, and unregulated (IUU) fishing have led to an expansion of initiatives to enhance transparency across the seafood industry through international agreements, national government regulations, and voluntary private initiatives. Understanding of the effects of these initiatives remains limited, and approaches contested among stakeholders.