Browsing by Author "Birkenbach, Anna M."
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Item Counterfactual Modeling of Multispecies Fisheries Outcomes under Market-Based Regulation(Journal of the Association of Environmental and Resource Economists, 2024-04-04) Birkenbach, Anna M.; Lee, Min-Yang; Smith, Martin D.Much of the recent work evaluating economic impacts of rights-based management (“catch shares”) in fisheries relies on treatment effects models, which typically identify net effects of the policy change but not underlying causal mechanisms. We develop a structural discrete choice model of individual vessel behavior to elucidate how catch shares—and the policies that they replace—influence species targets, timing of fishing activity, and the value generated from the resource. We estimate our model using trip-level data on 286 New England groundfish vessels before and after catch-share implementation. Controlling for weather, costs, and prices, we recover structural parameters characterizing microlevel targeting decisions and simulate the effects of removing input controls and replacing them with catch shares. We find that, under catch shares, the fleet experienced longer and more even fishing seasons, somewhat higher groundfish revenues, fewer closures, and a more balanced portfolio of target stocks than in the counterfactual. Dataverse data: https://doi.org/10.7910/DVN/PJ4YZZItem Harassment and obstruction of observers in U.S. fisheries(Frontiers in Marine Science, 2023-09-13) Dobson, Jessica L.; Kahley, Matthew R.; Birkenbach, Anna M.; Oremus, Kimberly L.Fishery observers play a crucial role in the management and conservation of fish stocks, but the treatment they receive aboard fishing vessels can affect their ability to perform their duties. Using law enforcement data from the Northeast and Alaska regions, home to the most important commercial fisheries in the United States, we explore the extent of observer harassment, assault, interference, and obstruction (OHAIO). We find that 16% of 10,346 fishery violations reported in the Northeast and Alaska regions from 2014-2018 are observer-related, and over 80% of those involve OHAIO. We trace how OHAIO incidents are reported and processed and propose steps to mitigate the issue.