Person Category: Ladder Faculty

Wesley Yin

June 30, 2023/in Public Policy Consumer Finance, Economic Development, Economics, Equity, Health Care, Labor and Employment, Public Finance Wesley Yin All Faculty, Ladder Faculty Faculty /by Mary Braswell

Wesley “Wes” Yin is a Professor of Economics at the UCLA Luskin School of Public Affairs, and the Anderson School of Management. He is also a Research Associate at the National Bureau of Economic Research, and a Faculty Affiliate at the Jameel Poverty Action Lab at MIT. He is currently on leave during the 2023-2024 year, serving as Chief Economist of the White House Office of Management and Budget.

Yin’s research focuses on health care, consumer finance, and economic inequality. His recent work studies competition and market power in health care, and the links between health care financing and consumer financial health and well-being.

His work has been published in leading economics and policy outlets such as the Quarterly Journal of Economics, the American Economic Review, the Review of Economics and Statistics, JAMA, Health Affairs, and the Hamilton Project at the Brookings Institution, and has been covered by the New York Times, Washington Post, New Yorker, Forbes, The Guardian, Bloomberg, The Atlantic, Vox, and others.

From 2012 to 2014, Yin served in the Obama Administration as Acting Chief Economist and Deputy Assistant Secretary for Microeconomic Policy at the U.S. Department of the Treasury, and in the White House Council of Economic Advisers, advancing policing on health care quality, insurance affordability, higher education finance, and housing market stability. Since 2014, Yin has advised the state of California on health care reforms, including the design of state subsidies for marketplace insurance.

Previously, he was an assistant professor at the University of Chicago and Boston University, and a Robert Wood Johnson Scholar in Health Policy at Harvard University. He received his PhD in economics from Princeton University.

Working Papers

The Effects of Medical Debt Relief: Evidence from Two Randomized Experiments (with Ray Kluender, Neale Mahoney and Francis Wong). NBER Working Paper #32315, April 2024. Conditionally accepted at The Quarterly Journal of Economics.

Pre-registrations: J-PAL Summary. AEA Pre-registration 1 (Collector Debt). AEA Pre-registration 2 (Hospital Debt). Media coverage: New York Times, The Guardian, Forbes, St. Louis Public Radio, Bloomberg, Vox, The Atlantic, Vox Today, Explained (Podcast), Tradeoffs (Podcast)

Provider Market Power and Adverse Selection in Health Insurance Markets (with Nicholas Tilipman). Draft available, upon request.

Selected Publications

The Impact of Financial Assistance Programs on Health Care Utilization (with Alyce Adams, Ray Kluender, Neale Mahoney, Jinglin Wang, and Francis Wong). American Economic Review: Insights. 4(3), September 2022: 389-407. Online Appendix.

Personalized Telephone Outreach Increased Health Insurance Take-Up for Hard-to Reach Populations (w/ Rebecca Myerson, Nicholas Tilipman, Andrew Fehrer, Honglin Li, and Isaac Menashe) Health Affairs. 41(1): 129–137, January 2022.

Trends in Medical Debt During the COVID Pandemic (with Raymond Kluender, Benedict Guttman-Kenney, Neale Mahoney, Francis Wong, and Xuyang Xia) JAMA Health Forum 3(5):e221031, May 2022.

Medical Debt in the United States, 2009-2020 (with Ray Kluender, Neale Mahoney and Francis Wong) Journal of the American Medical Association 326(3), July 2021. Media Coverage: NY Times, Washington Post, Vox, Marketwatch, CBS Evening News, Marketplace. JAMA editorial.

The Role of Behavioral Frictions in Health Insurance Marketplace Enrollment and Risk: Evidence from a Field Experiment. (with Richard Domurat and Isaac Menashe) American Economic Review 111(5): 1549–1574 , May 2021. [Online Appendix] Media Coverage: Tradeoffs Podcast

The Market for High-Quality Medicine: Retail Chain Entry and Drug Quality in India. 2019. (with Daniel Bennett) Review of Economics and Statistics 101(1) p.76-90 [Appendix]

Insurers’ Negotiating Leverage and the External Effect of Medicare Part D. 2015. (with Darius Lakdawalla), Review of Economics and Statistics 97:2 p.314-331 (an earlier version appears as NBER working paper no. 16251). Media coverage: New Yorker

Value of Survival Gains in Chronic Myeloid Leukemia (with John Penrod, J. Ross Maclean, Darius Lakdawalla and Tomas Philipson) American Journal of Managed Care 2012 Nov;18(11 Suppl):S257-64

R&D Policy, Agency Costs and Innovation in Personalized Medicine. 2009. Journal of Health Economics 28(5): 950-962.

Market Incentives and Pharmaceutical Innovation. 2008. Journal of Health Economics 27(4):1060-1077.

Female Empowerment: Impact of a Commitment Savings Product in the Philippines. 2010. (with Nava Ashraf and Dean Karlan) World Development 38(3): 333-344.

The Effect of the Medicare Part D Prescription Benefit on Drug Utilization and Expenditures (with Anirban Basu, James Zhang, Atonu Rabbani, David Meltzer, and Caleb Alexander) Lead article at Annals of Internal Medicine 148(3): 169-177. Annals’ Summary for Patients.

Designing Targeting Schemes with Poverty Maps: Does Disaggregation Help?. 2007. (with Berk Özler, Chris Elbers, Tomoki Fujii, Peter Lanjouw) Journal of Development Economics 83(1).

Tying Odysseus to the Mast: Evidence from a Commitment Savings Product in the Philippines. 2006. (with Nava Ashraf and Dean Karlan) Quarterly Journal of Economics 121(2). Winner of TIAA-CREF 2006 Certificate of Excellence.

Deposit Collectors (with Nava Ashraf and Dean Karlan). 2006. Advances in Economic Analysis & Policy 6(2), Article 5.

Robert Fairlie

June 27, 2023/in Public Policy Applied Microeconomics, Development, Education, Entrepreneurship, Immigration, Inequality, Information Technology, Labor, Race and Ethnicity All Faculty, Ladder Faculty Faculty /by Ronaldo Avina

I am a Professor of Public Policy and Economics at UCLA, and a member of the National Bureau of Economic Research (NBER). I study a wide range of topics including entrepreneurship, education, labor, racial, gender and caste inequality, information technology, immigration, health, and development. I strive for my research to have a broad impact by providing rigorous, unbiased and objective evidence on questions that are important for society and often involve highly-charged policy debates. My methodological focus is on conducting randomized control field experiments, employing advanced econometric techniques and identification strategies, and working with and building large administrative datasets. Publications from my research have appeared in leading journals in economics, policy, management, science, and medicine.

I received a Ph.D. and M.A. from Northwestern University and B.A. with honors from Stanford University. I have held visiting positions at Stanford University, Yale University, UC Berkeley, and Australian National University. I have received funding for my research from the National Science Foundation, National Academies and Russell Sage Foundation as well as numerous government agencies and foundations, and have testified in front of the U.S. Senate, U.S. House of Representatives, U.S. Department of Treasury, and the California State Assembly. Recent awards and honors include a joint resolution from the California State Assembly, Choice Academic Title award, and the Bradford-Osborne research award in both 2020 and 2021. I am regularly interviewed by the media to comment on economic, education, entrepreneurship, inequality and policy issues.

My new book on entrepreneurship, job creation and survival just came out at MIT Press.

For more information on my research, teaching, and policy work, please visit: https://rfairlie.sites.luskin.ucla.edu/

Megan Mullin

January 17, 2023/in Public Policy American Politics, Climate Change, Environmental Justice, Environmental Politics, Local Government, Political Economy, Public Opinion, Urban Politics, Water Policy All Faculty, Ladder Faculty Faculty /by Ronaldo Avina

Megan Mullin is Professor of Public Policy and holds the Luskin Endowed Chair in Innovation and Sustainability at UCLA. She is Faculty Director of the Luskin Center for Innovation, which partners with civic leaders on research to advance equitable public policy addressing environmental challenges.

Mullin is a political scientist whose research examines how coordination problems, accountability failure, and inequality in environmental risks and benefits shape political response to environmental change. Recent projects focus on the governance and finance of urban water services, public opinion about climate change, and the local politics of climate adaptation. She also has published on federalism, election rules and voter turnout, and local and state institutional design.

Mullin’s work has appeared in Nature, Science, American Political Science Review, American Journal of Political Science, Journal of Politics, and other journals in political science, public administration, and planning. She is the recipient of five awards from the American Political Science Association, including the Lynton Keith Caldwell Award for her book, Governing the Tap: Special District Governance and the New Local Politics of Water (MIT Press, 2009). Her research has been funded by the National Science Foundation, the U.S. Geological Survey, and private foundations. She works regularly with policy makers, and her research and commentary have appeared in many national and international media outlets. In 2020, she was named an Andrew Carnegie Fellow.

Mullin received her Ph.D. in political science from the University of California, Berkeley. She served on the faculties at Temple University and Duke University prior to joining UCLA in 2023.

Tierra Bills

February 4, 2022/in Public Policy Redesigning Transportation Systems, Transit Design and Reliability, Transportation Accessibility, Transportation Equity All Faculty, Ladder Faculty Faculty /by Ervin Huang

Tierra S. Bills is an Assistant Professor of Public Policy and Civil and Environmental Engineering at the University of California, Los Angeles. She specializes in the evaluation of transportation planning and system outcomes, and travel demand modeling, with a special emphasis on transportation equity. Dr. Bills brings a unique and innovative perspective to the challenge of transportation inequity, aimed at impacting transportation science, practice, and quality of life for vulnerable communities. She has worked in the transportation equity domain since 2009 and her current work builds off this track record, including her master’s research, dissertation work, study and training as a Research Scientist at IBM Research, Michigan Society Fellowship research, and previous work as a former Assistant Professor at Wayne State University.

Dr. Bills has extensive training in travel demand modeling and is engaged in ongoing work on representation of transport vulnerable travelers, in household travel surveys. These travel surveys are traditionally used to estimate and validate travel demand models and this is a pathway to developing travel models capable of reflecting the needs and behaviors of disadvantaged travelers and fine-grain transportation equity outcomes. Dr. Bills also works to advance accessibility measurement for transportation project evaluation, and develops strategies for ranking alternative transportation plans using equity-based criteria.

At UCLA, Dr. Bills directs the Transportation Equity Innovation (TrEI) Lab, and leads a team of graduate and undergraduate students in developing innovative, meaningful, and effective tools for assessing fairness in transportation infrastructure, systems, and policies. Dr. Bills is also affiliated with the UCLA Institute of Transportation Studies, UCLA Bunche Center, and collaborates with students, faculty, and researchers across engineering, policy, planning and other disciplines. Her team’s work is published in a range of journals including Transport Policy, Transportation Research Part D, Transportation, and Transportation Research Record.

Selected Publications

Srisan, T., & Bills, T. (2024). A Case for Race and Space in Auto Ownership Modeling: a Los Angeles County study. Transport Policy. (Link)

Bills, T. S. (2022). Advancing the Practice of Regional Transportation Equity Analysis: a San Francisco Bay area case study. Transportation, 1-26. (Link)

Bills, T. S., Twumasi-Boakye, R., Broaddus, A., & Fishelson, J. (2022). Towards transit equity in Detroit: An assessment of microtransit and its impact on employment accessibility. Transportation Research Part D: Transport and Environment, 109, 103341. (Link)

Bills, T. S., & Carrel, A. L. (2021). Transit accessibility measurement considering behavioral adaptations to reliability. Transportation research record, 2675(5), 265-278. (Link)

Bills, T. S., & Walker, J. L. (2017). Looking beyond the mean for equity analysis: Examining distributional impacts of transportation improvements. Transport Policy, 54, 61-69. (Link)

Bills, T. S., Sall, E. A., & Walker, J. L. (2012). Activity-based travel models and transportation equity analysis: Research directions and exploration of model performance. Transportation research record, 2320(1), 18-27. (Link)

Veronica Terriquez

August 4, 2021/in Urban Planning Immigrants, low-income residents of color, Youth civic engagement All Faculty, Ladder Faculty Faculty /by Melody Wang

Veronica Terriquez joins UCLA from UC Santa Cruz, where she was an associate professor of sociology. She received her doctorate in sociology from UCLA, a master’s in education from UC Berkeley, and her bachelor’s in sociology from Harvard University. Often taking an intersectional approach, her research focuses on social inequality, immigrant incorporation, and transitions to adulthood. She is interested in understanding how institutional policies and practices can be responsive to the needs of low-income immigrant, Black, and Indigenous communities. She has published widely in journals and disseminated research in collaboration with schools, unions, community organizers and local governments. Terriquez’s research is geared toward policy relevance. She has received major grants from the Irvine Foundation, the California Endowment, and the Bill & Melinda Gates Foundation, as well as fellowships from the Ford Foundation and the Stanford Center for the Advanced Study in the Behavioral Sciences.

Professor Terriquez’s publications include awarding-winning work recognized by the American Sociological Association. She is committed to active mentorship of students both as project collaborators and co-authors of published work.

Jasmine D. Hill

July 8, 2021/in Public Policy Families, Labor Markets, Poverty, Racial Inequality, Social Mobility All Faculty, Ladder Faculty Faculty /by Ervin Huang

Jasmine D. Hill is an Assistant Professor of Public Policy and Sociology at the University of California, Los Angeles. She is a sociologist whose scholarship focuses on racial inequality and social mobility for Black Americans. Her current work explores the mechanisms that lift communities of color out of poverty and the ramifications of upward mobility for Black families. Jasmine’s scholarship has been published in top journals such as Social Problems, Teaching Sociology, The Journal of Cultural Economy, and in 2017 she co-edited Inequality in the 21st Century with David B. Grusky (Westview Press). As a publicly engaged scholar, she’s also authored several influential research briefs for policymakers, surveying topics like race, intimate partner violence, and tactics to eliminate extreme poverty.

Her scholarly contributions have been recognized and awarded by the Washington Center for Equitable Growth, the Society for the Study of Social Problems, the American Sociological Association, and the Stanford Center for the Comparative Study of Race & Ethnicity. Because of her expertise on matters related to race, inequality, and the labor market, Jasmine is regularly called to design and evaluate anti-racism initiatives with organizations like the Annenberg Foundation, Blue Shield of California Foundation, University of California Students Association, and numerous corporate partners like Soylent, Dollar Shave Club and PocketWatch.

Her work and advocacy have garnered attention from TIME Magazine, The Los Angeles Times, and Cheddar News. Jasmine maintains an active speaking, facilitating, and training schedule – working with universities, foundations, nonprofit organizations, and corporations to increase racial equity in our economy. She received her B.A. in Communication Studies from UCLA and she holds a Ph.D. in Sociology from Stanford University. More information can be found at jasmine-hill.com.

Term	Course	Location	Level
Winter 2023	Qualitative Methods	UCLA Public Policy	Graduate-Level
Spring 2023	Labor Policy and Racial Inequality	UCLA Public Policy	Graduate-Level

Marques Vestal

March 30, 2021/in Urban Planning Marques Vestal All Faculty, Ladder Faculty Faculty /by webteam

Marques Vestal is an Assistant Professor of Urban Planning and Critical Black Urbanism. He serves as a Faculty Advisor for Million Dollar Hoods, a community-driven and multidisciplinary initiative documenting the human and fiscal costs of mass incarceration in Los Angeles. He also serves as a historical consultant for the Luskin Center for History and Policy. Marques is a tenant of Los Angeles and a member of the South Central local of the Los Angeles Tenants Union.

Marques is an urban historian studying the social history of residential property in Black Los Angeles during the rebellious twentieth century. His work links property conflict—the everyday contracts, solicitations, complaints, lawsuits, and murders over property—to broader transformations of real estate, urban development, and Black liberation. He argues that this space of incessant conflict is the unwritten housing policy of the United States.

Marques’ research interests are broad, but center on the twentieth-century experience of a few key political relations to land: property, housing insecurity, municipal incapacity, and racial capitalism. Having witnessed, archivally and firsthand, the violence of Los Angeles’ rental housing markets, he is dedicated to projects that advance social housing and horizontal tenant governance.

Publications

Marques Vestal and Andrew Klein, “What we should have learned from L.A.’s long history of homelessness,” Los Angeles Times, February 22, 2021. https://www.latimes.com/opinion/story/2021-02-22/homelessness-encampments-shelter-los-angeles-history

Kirsten Moore-Sheeley et. al. “The Making of a Crisis: A History of Homelessness in Los Angeles,” UCLA Luskin Center for History and Policy. https://luskincenter.history.ucla.edu/wp-content/uploads/sites/66/2021/01/LCHP-The-Making-of-A-Crisis-Report.pdf. (February 2021)

Lytle Hernandez, Kelly and Marques Vestal. “Million Dollar Hoods: A Fully-Loaded Cost Accounting of Mass Incarceration in Los Angeles,” Radical History Review. http://www.radicalhistoryreview.org/

Katz, Alisa with Peter Chesney, Lindsay King, and Marques Vestal. “People Are Simply Unable to Pay Rent: What History Tells Us About Rent Control in Los Angeles,” White Paper. Luskin Center for History and Policy, University of California, Los Angeles. (October 2018)

Adam Millard-Ball

January 4, 2021/in Urban Planning autonomous vehicles, carbon trading, climate action planning, Street-network sprawl All Faculty, Ladder Faculty Faculty /by Les Dunseith

Adam Millard-Ball is Professor of Urban Planning at the UCLA Luskin School of Public Affairs and director of the UCLA Institute of Transportation Studies. His research and teaching are about transportation, the environment, and urban data science. Trained as an economist, a geographer, and an urban planner, he analyzes the environmental consequences of transportation and land-use decisions, and the effectiveness of policies to reduce greenhouse gas emissions. His research uses large-scale geospatial data analysis as well as econometric and qualitative methods.

For more details about Dr. Millard-Ball’s teaching and research, please visit his website. Note that he is on sabbatical for the 2023-24 academic year.

José Loya

July 10, 2020/in Real Estate Development, Urban Planning Housing, Quantitative Analysis, Race and Ethnicity Jose Loya All Faculty, Ladder Faculty Faculty /by Melody Wang

José Loya is an Assistant Professor in Urban Planning at UCLA’s Luskin School of Public Affairs and faculty affiliate with the Chicano Studies Research Center. His research addresses Latino issues in urban areas by connecting ethno-racial inequality and contextual forces at the neighborhood, metropolitan, and national levels. His research discusses several topics related to stratification in homeownership, including ethno-racial, gender, and Latino disparities in mortgage access. José received his PhD. at the University of Pennsylvania in Sociology and holds a master’s degree in Statistics from the Wharton School of Business at Penn. Prior to graduate school, José worked for several years in community development and affordable housing in South Florida.

Kirsten Schwarz

January 30, 2020/in Urban Planning Community-engaged Research, Environmental Justice, Public Health, Science Communication, Urban Ecology All Faculty, Ladder Faculty Faculty /by Steven King

Kirsten Schwarz is an urban ecologist working at the interface of environment, equity, and health. Her research focuses on environmental hazards and amenities in cities and how their distribution impacts minoritized communities. Her work on lead contaminated soils documents how biogeophysical and social variables relate to the spatial patterning of soil lead. Her research on urban tree canopy has revealed large scale patterns related to income and tree canopy as well as historical legacies that impact this relationship. Most recently, Dr. Schwarz led an interdisciplinary team working on a community-engaged green infrastructure design that integrated participatory design and place-based solutions to realizing desired ecosystem services.

Her expertise in science communication and engaging communities in the co-production of science was recognized by the American Association for the Advancement of Science (AAAS) naming her a Fellow in the Leshner Leadership Institute in the Center for Public Engagement with Science and Technology. Dr. Schwarz’s research has been funded by the National Science Foundation, AAAS, and the University of California Agriculture and Natural Resources.

Dr. Schwarz has a BA in Human Ecology from College of the Atlantic and a Ph.D. in Ecology from Rutgers University. Prior to joining UCLA, she was an Associate Professor of Environmental Science at Northern Kentucky University where she directed their Ecological Stewardship Institute.

Selected Publications:

Schwarz, K., A. Berland, and D.L. Herrmann. 2018. Green, but not just: Rethinking environmental justice outcomes in shrinking cities. Sustainable Cities and Society 41:816-821.

Ossola, A., L.A. Schifman, D.L. Herrmann, A.S. Garmestani, K. Schwarz, and M.E. Hopton. 2018. The provision of urban ecosystem services throughout the private-social-public domain: a conceptual framework. Cities and the Environment 11(1): Article 5.

Herrmann, D.L., W-C Chuang, K. Schwarz, T.M. Bowles, A.S. Garmestani, W.D. Shuster, T. Eason, M.E. Hopton, C.R. Allen. 2018. Agroecology for the shrinking city. Sustainability 10(3):675.

Cutts, B.B., J.K. London, S. Meiners, K. Schwarz, and M.L. Cadenasso. 2017. Moving dirt: Soil, lead and the unstable politics of urban gardening. Local Environment 22(8):998-1018.

London, J.K., K. Schwarz, M.L. Cadenasso, B.B. Cutts, C. Mason, J. Lim, K. Valenzuela-Garcia and H. Smith. 2017. Weaving community-university research and action partnerships for environmental justice. Action Research 16(2):173-189.

Schwarz, K., R.V. Pouyat, and I. Yesilonis. 2016. Legacies of lead in charm city’s soil: Lessons from the Baltimore Ecosystem Study. International Journal of Environmental Research and Public Health 13(2):209.

Herrmann, D.L., K. Schwarz, W.D. Shuster, A. Berland, B.C. Chaffin, A.S. Garmestani, and M.E. Hopton. 2016. Ecology for the shrinking city. BioScience 66(11):965-973.

Schwarz, K., B.B. Cutts, J.K. London, and M.L. Cadenasso. 2016. Growing gardens in shrinking cities: A solution to the soil lead problem? Sustainability 8(2):141.

Cutts, B.B., D. Fang, K. Hornik, J.K. London, K. Schwarz and M.L. Cadenasso. 2016. Media frames and shifting places of environmental (in)justice: a qualitative historical geographic information system method. Environmental Justice 9(1):23-28.

Berland, A., K. Schwarz, D. L. Herrmann, M.E. Hopton. 2015. How environmental justice patterns are shaped by place: terrain and tree canopy in Cincinnati, Ohio, USA. Cities and the Environment 8(1):Article 1.

Schwarz, K., M. Fragkias, C.G. Boone, W. Zhou, M. McHale, J.M. Grove, J. O’Neil-Dunne, J.P. McFadden, G.L. Buckley, D. Childers, L. Ogden, S. Pincetl, D. Pataki, A. Whitmer, and M.L. Cadenasso. 2015. Trees grow on money: urban tree canopy cover and environmental justice. PLoS ONE 10(4).

Zhou, W., M.L. Cadenasso, K. Schwarz, and S.T.A. Pickett. 2014. Quantifying spatial heterogeneity in urban landscapes: integrating visual interpretation and object-based classification. Remote Sensing 6(4):3369-3386.

Schwarz, K., K.C. Weathers, S.T.A. Pickett, R.G. Lathrop, R.V. Pouyat, and M.L. Cadenasso. 2013. A comparison of three empirically based, spatially explicit predictive models of residential soil Pb concentrations in Baltimore, Maryland USA: understanding the variability within cities. Environmental Geochemistry and Health 35(4):495-510.

Schwarz, K., S.T.A. Pickett, R.G. Lathrop, K.C. Weathers, R.V. Pouyat, and M.L. Cadenasso. 2012. The effects of the urban built environment on the spatial distribution of lead in residential soils. Environmental Pollution 163:32-39.

Osmond, D.L., N.M. Nadkarni, C.T. Driscoll, E. Andrews, A.J. Gold, S.R. Broussard Allred, A.R. Berkowitz, M.W. Klemens, T.L. Loecke, M.A. McGarry, K. Schwarz, M.L. Washington and P.M. Groffman. 2010. The role of interface organizations in science communication and understanding. Frontiers in Ecology and the Environment 8(6):306-313.

Boone, C.G., M.L. Cadenasso, J.M. Grove, K. Schwarz, and G.L. Buckley. 2010. Landscape, vegetation characteristics, and group identity in an urban and suburban watershed: why the 60s matter. Urban Ecosystems 13(3):255-271.

Zhou, W., K. Schwarz, and M.L. Cadenasso. 2010. Mapping urban landscape heterogeneity: agreement between visual interpretation and digital classification approaches. Landscape Ecology 25(1):53-67.

Cadenasso, M.L., S.T.A. Pickett, and K. Schwarz. 2007. Spatial heterogeneity in urban ecosystems: reconceptualizing land cover and a framework for classification. Frontiers in Ecology and the Environment 5(2):80-88.

Grove, J.M., M.L. Cadenasso, W.R. Burch, Jr., S.T.A. Pickett, K.Schwarz, J. O’Neil-Dunne, M. Wilson, A. Troy, and C.Boone. 2006. Data and methods comparing social structure and vegetation structure of urban neighborhoods in Baltimore, Maryland. Society and Natural Resources 19:117-136.