Eric P. Smith
Professor, 1982. Department Head, 2006.
Office: 406A Hutcheson Hall
Phone: (540) 231-5657
Fax: (540) 231-3863
E-mail: epsmith@vt.edu
Office Hours:
Link to syllabi for all courses.
Readme File for BiPlot
BiPlot Program
EPA STAR Project: Assessing Multiple Effects
Research areas:
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multivariate analysis
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multivariate graphics
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biological sampling and modeling
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ecotoxicology
Selected Publications:
Smith, E.P., Robinson, T., Field, L.J., Norton, S.B. 2003. "Predicting Sediment Toxicity Using Logistic Regression: A Concentration-Addition Approach" Environmental Toxicology and Chemistry, 22(3): 565-575. Adobe PDF
Lipkovich, I., and Smith, E.P. 2003. Model Based Clustering. (DRAFT). Adobe PDF
Smith, E.P. 2002 Statistical Considerations in the Development, Evaluation, and Use of Biomarkers in Environmental Studies. Pages 565-590 in Biological Indicators of Aquatic Ecosystem Stress, American Fisheries Society, Bethesda, Maryland. Adobe PDF
Smith, E.P., I. Lipkovich, K. Ye. Weight of Evidence: Quantitative Estimation of Probability of Impact. Submitted to Human and Ecological Risk Assessment Adobe PDF
Smith, E.P., I. Lipkovich, K. Ye. 2002. "Weight of Evidence: Quantitative Estimation of Probability of Impairment for Individual and Multiple Lines of Evidence" Human and Ecological Risk Assessment, 8(7): 1585-1596. Adobe PDF
Smith, E.P., T. Robinson, L.J. Field and S. Norton. Predicting Sediment Toxicity Using Logistic Regression. Awaiting comments from co-authors. Submitted to Environmental Toxicology and Chemistry. Adobe PDF Supplemental Material
Smith, E.P. 2002. BACI design. Pages 141-148 in A.H. El-Shaarawi and W.W. Piegorsch, eds, Enclcyopedia of Environmentrics,. John Wiley & Sons, Ltd, Chichester. Adobe PDF Errata
Smith, E.P. 2002. Ecological Statistics. Pages 589-602 in A.H. El-Shaarawi and W.W. Piegorsch, eds, Enclcyopedia of Environmentrics,. John Wiley & Sons, Ltd, Chichester. Adobe PDF
Smith, E.P. 2002. Encountered data. Pages 668-669 in A.H. El-Shaarawi and W.W. Piegorsch, eds, Enclcyopedia of Environmentrics,. John Wiley & Sons, Ltd, Chichester. Adobe PDF
Smith, E.P. 2002. Impact, environmental. Pp 1035-1037 in A.H. El-Shaarawi and W.W. Piegorsch, eds, Enclcyopedia of Environmentrics,. John Wiley & Sons, Ltd, Chichester. Adobe PDF
Smith, E.P. 2002. Monitoring, biological. Pages 1296-1300 in A.H. El-Shaarawi and W.W. Piegorsch, eds, Enclcyopedia of Environmentrics,. John Wiley & Sons, Ltd, Chichester. Adobe PDF
Ye, K., and Smith, E.P. 2002. "A Bayesoan Approach to Evaluating Site Impairment" Environmental and Ecological Statistics, 9, 379-392. Adobe PDF
Darken, P.F, Zipper, C.E., Holtzman, G.I., and Smith, E.P. "Serial correlation in water quality variables: Estimation and implications for trend analysis." Water Resources Research, 38(7): 22-1 - 22-7. Adobe PDF
Smith, E.P. 2002. Uncertainty analysis. Pages 2283-2297 in A.H. El-Shaarawi and W.W. Piegorsch, eds, Enclcyopedia of Environmentrics,. John Wiley & Sons, Ltd, Chichester. Adobe PDF
Smith, E. P. and P. M. McCormick. 2001. "Long term trends in phosphorous in an Everglades marsh." Environmental Monitoring and Assessment, 68(2): 153-176. Adobe PDF
Wang, Shin Cheng David, E.P. Smith. 2000. "Adjusting for morality effects in chronic toxicity testing: Mixture model approach." Environmental Toxicology and Chemistry, 19(1), 204-209.
Niederlehner, B. R., John Cairns, Jr., and E. P. Smith. 1998 "Modeling acute and chronic toxicity of nonpolar narcotic chemicals and mixtures to Ceriodaphnia dubia", Ecotoxicology and Environmental Safety 39, 136-146.
Peigorsch, Walter W., Eric P. Smith, Don Edwards and Richard L. Smith. 1998. "Statistical advances in environmental science." Statistical Science 13, (2), 186-208.
Rose, Kenneth A., Eric P. Smith. 1998. "Statistical assessment of model goodness-of-fit using permutation tests." Ecological Modelling 106, 129-139.
See, K. and E. P. Smith. 1998. "Testing interaction in three-way ANOVA tables with a single observation per cell." Communications in Statistics:Theory and Methods 27(4), 839-866.
Smith, Eric P. 1998. "Randomization methods and the analysis of multivariate ecological data." Environmetrics 9, 37-51. Adobe PDF
Smith, E.P. and K.R. Rose. 1995. "Model goodness of fit using regression and related techniques." Ecological Modelling 77, 49-64. Adobe PDF
Smith, E.P. and J. Cairns, Jr. 1993. "Extrapolation methods for setting ecological standards: Statistical and ecological concerns." Ecotoxicology 2, 203-219. Adobe PDF
Smith, E.P., D. Orvos, J. Cairns, Jr. 1993. "Impact assessment using the before-after control-impact model: Comments and concerns." Canadian Journal of Fisheries and Aquatic Science 50, 627-637. Adobe PDF
Smith, E.P., S. Rheem, and G.I. Holtzman. 1993. Chapter 23. "Multivariate assessment of trend in environmental variables." In Multivariate Environmental Statistics. G.P. Patil, C.R. Rao, and N.P. Ross (eds.), 489-508. Adobe PDF
Beauchamp, J.J., S. Christensen, and E.P. Smith. 1992. "Selection of factors affecting the presence of brook trout in Adirondack lakes: A case study." Canadian Journal of Fisheries and Aquatic Sciences 49, 597-608. Adobe PDF
Rose, K.A., and E.P. Smith. 1992. Experimental design: "The neglected aspect of environmental monitoring." Environmental Management 16(6), 691-700. Adobe PDF
Rose, K.A., E.P. Smith, R.H. Gardner, A.L. Brenkert and S.M. Bartell. 1991. "Parameter sensitivities, Monte Carlo filtering, and model forecasting under uncertainty." Journal of Forecasting 10, 117-133. Adobe PDF
Smith, E.P. and K. Rose. 1991. "Trend detection in the presence of covariates: Stagewise versus
multiple regression." Environmetrics 2(2), 153-168. Adobe PDF
Smith, E.P. and B.D. Marx. 1990. "Ill-conditioned information matrices, the generalized linear model and estimation of the effects of acid rain." Environmentrics 1, 57-72. Adobe PDF
Marx, B.D. and E.P. Smith. 1990. "Principal component regression for generalized linear models." Biometrika 77, 23-31. Adobe PDF
Marx, B.D. and E.P. Smith. 1990. "Weighted multicollinearity in logistic regression: Diagnostics and biased estimation techniques with an example from lake acidification." Canadian Journal of Fisheries and Aquatic Sciences. 47, 1128-1135. Adobe PDF
Smith, E.P., K.W. Potasch and J. Cairns, Jr. 1990. "Community similarity and the analysis of multispecies environmental data: a unified statistical approach." Water Research 24(4), 507- 514. Adobe PDF
Lu, R.P., E.P. Smith and I.J. Good. 1989. "Multivariate measures of similarity and niche overlap." Theoretical Population Biology 35, 1-21. Adobe PDF
Pontasch, K.W., E.P. Smith, J. Cairns, Jr. 1989. "Diversity indices, community comparison indices and canonical discriminate analysis: interpreting the results of multispecies toxicity tests." Water Research 23(10), 1229-1238. Adobe PDF
Genter, R., D. Cherry, E.P. Smith and J. Cairns, Jr. 1987. "Algal periphyton population and community changes from zinc stress in stream mesocosms." Hydrobiologia 153, 261-275. Adobe PDF
O'Keefe, R., O. Balci and E.P. Smith. 1987. "Validation of expert system performance." IEEE Transaction on Expert System 2(4), 81-90. Reprinted in AI Applications in Natural Resource Management 2, 35-43. Also reprinted in J.S. Chandler and T.P. Liang, 1990. Developing Expert Systems for Business Applications, Merrill, Columbus. Pp. 91-100. Also reprinted in U. Gupta (ed.,), Validating and Verifying Knowledge-based Systems, IEEE computer Society Press, Los Alamitos, CA, pp. 2-11. Adobe PDF
Good, I.J. and E.P. Smith. 1986. "An additive algorithm related to the singular decomposition; or a comparison of polarization, and multiplicative models." Communications in Statistics: Simulation and Computation 15, 545-570. Adobe PDF
Smith, E.P., R. Genter and J. Cairns Jr. 1986. "Confidence intervals for the similarity between algal communities." Hydrobiologia 139, 237-247. Adobe PDF
Smith, E.P. 1985. "Estimating the reliability of diet overlap measures." Enviornmental Biology of Fishes 13, 125-138. Adobe PDF
Smith, E.P. 1985. "Statistical comparison of weighted overlap measures." Transactions of the American Fisheries Society 114, 250-257. Adobe PDF
Smith, E. P., P.M. Stewart and J. Cairns, Jr. 1985. "Similarities between refraction methods." Hydrobiologia 120, 167-170. Adobe PDF
Smith, E. P. and Gerald van Belle. 1984. "Nonparametric estimation of species richness." Biometrics 40, 119-129. Adobe PDF
Zaret, T.M. and E.P. Smith. 1984. "On measuring niches and not measuring niches." In Evolutionary Ecology of Neotropical Freshwater Fishes, T.M. Zaret, ed., Dr. W. Junk Publishers, The Hague, Netherlands, 128-137. Adobe PDF
Smith, E.P. 1982. "Niche breadth, resource availability and statistical inference." SIMS Technical Report No. 8, Biomathematics Group, University of Washington. Adobe PDF
Smith, E. P. and T.M. Zaret. 1982. "Bias in estimating niche overlap." Ecology 63, 1248-1253.Adobe PDF
Grants:
"Model-Based Clustering for Classifications of Aquatic Systems and Diagnosis of Ecological Stress". USEPA, 2003-2006.
"Assessing multiple stressors over large geographic areas." USEPA/NSF (with K. Ye), 1999-2002.
"Empirical models for diagnosing causes of stress using biological assessment data." USEPA 1999-2001.
"Evaluation of methods for standards assessment" Water Resources Center, 1998.
"Analysis of long term ecological monitoring of the New River Gorge," National Park Service. 1996.
"Chronic toxicity of complex mixtures: development of efficient design and analysis of predictive errors," Air Force Grant #430563 (with J. Cairns, Jr., R. Myers, and B.R. Nederlehner). 1994-1995.
Courses taught:
Biometry, multivariate methods, biological statistics, consulting
Other activities:
Director of the Statistical Consulting Center, Associate Editor: Environmetrics 1989 to present, Journal of Agricultural, Biological and Environmental Statistics, 1994 to present, Asssociate Editor, Journal of the American Statistical Association, Applications and Case Studies, 1998 to present, Editorial Collaborator, Ecological and Environmental Statistics, 1996 to present, Secretary, The International Environmetrics Society (TIES), 1994 to 2000, Chair elect: Environmental Statistics Section of the American Statistical Association (2001).
Professional Memberships:
International Statistics Institute
American Statistical Association
Society of Environmental Toxicology and Chemistry
The International Environmetric Society