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Am J Agric Econ 2019 Jan 18;101(1):311-329. Epub 2018 Jun 18.

Scientific Data Analyst, ICF.

We construct panel price indexes using retail scanner data that allow comparisons of consumption cost across space and time. Two types of panel indexes are examined: the rolling-window panel extensions of the multilateral Cave-Christensen-Diewert (CCD) index with the Törnqvist index as its elements, and of the multilateral Gini-Eltetö-Köves-Szulc (GEKS) index using the Fisher ideal index as its elements. The rolling window method maintains the nonrevisability of published index numbers while it allows index numbers for new periods and locations be calculated and the basket of items be updated. Read More

Am J Agric Econ 2018 Oct 11;100(5):1357-1374. Epub 2018 Sep 11.

Department of Human Sciences, The Ohio State University.

The rise in drug overdose deaths in the United States since the turn of the millennium has been extraordinary. A popular narrative paints a picture whereby opioid overdoses among white, male, less-educated, rural workers have been caused by reduced economic opportunities borne by such people. In this article, we causally test the validity of this theory by using Bartik-type variables to explore the relationship between local economic conditions and county opioid overdose death rates. Read More

Am J Agric Econ 2018 Jan;100(1):220-238

Assistant professor in the Environmental and Natural Resource Economics Department at the University of Rhode Island.

We introduce a model that incorporates two important elements to estimating welfare gains from groundwater management: stochasticity and a spatial stock externality. We estimate welfare gains resulting from optimal management under uncertainty as well as a gradual stock externality that produces the dynamics of a large aquifer being slowly exhausted. This groundwater model imposes an important aspect of a depletable natural resource without the extreme assumption of complete exhaustion that is necessary in a traditional single cell (bathtub) model of groundwater extraction. Read More

Am J Agric Econ 2014 Jul;96(4):1070-1083

The obesity epidemic and excessive consumption of sugar-sweetened beverages have led to proposals of economics-based interventions to promote healthy eating in the United States. Targeted food and beverage taxes and subsidies are prominent examples of such potential intervention strategies. This paper examines the differential effects of taxing sugar-sweetened beverages by calories and by ounces on beverage demand. Read More

Am J Agric Econ 2014 Jan;96(1):1-25

U.S. Department of Agriculture, Economic Research Service.

A censored Exact Affine Stone Index incomplete demand system is estimated for 23 packaged foods and beverages and a numéraire good. Instrumental variables are used to control for endogenous prices. A half-cent per ounce increase in sugar-sweetened beverage prices is predicted to reduce total calories from the 23 foods and beverages but increase sodium and fat intakes as a result of product substitution. Read More

Am J Agric Econ 2011 ;93(4):1082-1098

Economist and research associate at the Urban Institute.

Nearly 15% of all U.S. households and 40% of near-poor households were food insecure in 2009. Read More

Am J Agric Econ 2008 Nov;90(4):951-961

Vitor A. Ozaki and Ricardo Shirota are professors, respectively, in the Department of Exact Sciences and Economics, Business, and Sociology, University of São Paulo; Sujit K. Ghosh and Barry K. Goodwin are full and William Neal Reynolds Distinguished Professor, respectively, in the Department of Statistics and Agricultural and Resource Economics, North Carolina State University.

This article presents a statistical model of agricultural yield data based on a set of hierarchical Bayesian models that allows joint modeling of temporal and spatial autocorrelation. This method captures a comprehensive range of the various uncertainties involved in predicting crop insurance premium rates as opposed to the more traditional ad hoc, two-stage methods that are typically based on independent estimation and prediction. A panel data set of county-average yield data was analyzed for 290 counties in the State of Paraná (Brazil) for the period of 1990 through 2002. Read More

Am J Agric Econ 1997 ;79(5):1467-70

Am J Agric Econ 1996 Dec;78(5):1346-8

Am J Agric Econ 1995 Aug;77(3):706-11

Am J Agric Econ 1993 Dec;75(5):1249-53

Am J Agric Econ 1991 Dec;73(5):1440-7

Am J Agric Econ 1991 Dec;73(5):1,334-47

The author analyzes the relationship between population and the environment, with a focus on "the role which environmental degradation and natural resources depletion may play in producing the... Read More

Am J Agric Econ 1990 Dec;72(5):1318-22

Am J Agric Econ 1982 Aug;64(3):444-54

An analysis of the impact of migration to the United States on the sending community and on the labor market in the receiving country is presented based on a case study of Las Animas, Mexico. "As the community becomes increasingly involved in migration, tendencies can be identified regarding changing migration patterns, class differentiation among villagers, impact of migration on village economy, and the changing role of Mexican workers in California labor markets. Results indicate the importance of social networks in determining the outcome of migration; while migration is individually rational, it is a factor of stagnation for village economy, and it helps reproduce segmented California labor markets. Read More

Am J Agric Econ 1982 May;64(2):177-87

Am J Agric Econ 1979 ;61(5):960-6

Am J Agric Econ 1976 ;58(5):967-70

Am J Agric Econ 1976 ;58(5):963-6

Am J Agric Econ 1976 ;58(5):959-62

Am J Agric Econ 1976 ;58(5):953-8

Am J Agric Econ 1976 ;58(5):953-70