Georgiy Bobashev

Fellow and Senior Data Scientist




Georgiy Bobashev is an RTI Fellow in the Center for Data Science at RTI International with more than 20 years of experience in health research. His current research interests follow two major areas: predictive modeling and studies of substance use and risky behaviors. Predictive methods often combine mechanistic (e.g., agent-based and system dynamics) and machine learning techniques. Dr. Bobashev has applied modeling, statistical analysis and experimental design to a variety of health- and policy-related areas, including substance use, HIV, child/maternal health, influenza, cancer, diabetes, and violent behavior. He has been a principal investigator and co-investigator on numerous grants from the National Institutes of Health (NIH). In addition to his RTI duties, Dr. Bobashev is an adjunct Associate Professor at the Department of Biostatistics at the University of North Carolina Chapel Hill, an adjunct Assistant Professor at the Department of Statistics at North Carolina State University, a nonresident fellow at John Hopkins Center for Advanced Modeling, and an adjunct faculty at the University College Dublin in Ireland and University of Evora, Portugal.

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Preiss A, Baumgartner P, Edlund MJ, Bobashev GV. (2022). Using Named Entity Recognition to Identify Substances Used in the Self-medication of Opioid Withdrawal: Natural Language Processing Study of Reddit Data. JMIR formative research, 6(3)

Quiner C, Jones K, Bobashev G. (2022). Impacts of timing, length, and intensity of behavioral interventions to COVID-19 dynamics: North Carolina county-level examples. Infectious Disease Modelling, 7(3)

Jarlais DD, Bobashev G, Feelemyer J, McKnight C. (2022). Modeling HIV transmission among persons who inject drugs (PWID) at the "End of the HIV Epidemic" and during the COVID-19 pandemic. Drug and alcohol dependence, (238)

Bobashev GV, Warren LK. (2022). National polydrug use patterns among people who misuse prescription opioids and people who use heroin. Results from the National Household Survey on Drug Use and Health. Drug and alcohol dependence, (238)

Preiss A, Hadley E, Jones K, Stoner MCD, Kery C, Baumgartner P, Bobashev G, Tenenbaum J, Carter C, Clement K, Rhea S. (2022). Incorporation of near-real-time hospital occupancy data to improve hospitalization forecast accuracy during the COVID-19 pandemic. Infectious Disease Modelling

Hadley E, Rhea S, Jones K, Li L, Stoner M, Bobashev G. (2022). Enhancing the prediction of hospitalization from a COVID-19 agent-based model: A Bayesian method for model parameter estimation. PloS one, 17(3)

Bobashev G, Warren L, Wu LT. (2021). Predictive model of multiple emergency department visits among adults: analysis of the data from the National Survey of Drug Use and Health (NSDUH). BMC health services research, 21(1)

Kampov-Polevoy A, Bobashev G, Garbutt JC. (2021). Exploration of the Impact of Combining Risk Phenotypes on the Likelihood of Alcohol Problems in Young Adults. Alcohol and alcoholism (Oxford, Oxfordshire)

Rhea S, Jones K, Endres-Dighe S, Munoz B, Weber DJ, Hilscher R, MacFarquhar J, Sickbert-Bennett E, DiBiase L, Marx A, Rineer J, Lewis J, Bobashev G, . (2020). Modeling inpatient and outpatient antibiotic stewardship interventions to reduce the burden of Clostridioides difficile infection in a regional healthcare network. PloS one, 15(6)

Bobashev G, Mars S, Murphy N, Dreisbach C, Zule W, Ciccarone D. (2019). Heroin type, injecting behavior, and HIV transmission. A simulation model of HIV incidence and prevalence. PloS one, 14(12)

Rhea S, Hilscher R, Rineer JI, Munoz B, Jones K, Endres-Dighe SM, DiBiase LM, Sickbert-Bennett EE, Weber DJ, MacFarquhar JK, Dubendris H, Bobashev G. Creation of a Geospatially Explicit, Agent-based Model of a Regional Healthcare Network with Application to Clostridioides difficile Infection. Health security, 17(4)

Vasiliy Leonenko, Alexander Lobachev, Georgiy Bobashev. (2019). Spatial Modeling of Influenza Outbreaks in Saint Petersburg Using Synthetic Populations. International Conference on Computational Science

Leonenko V, Bobashev G. (2019). Analyzing influenza outbreaks in Russia using an age-structured dynamic transmission model. Epidemics, (29)

Kasey Jones, Breda Munoz, James Rineer, Georgiy V. Bobashev, Rainer Hilscher, Sarah Rhea. (2019). On Calibrating a Microsimulation of Patient Movement Through a Healthcare Network. 2019 Winter Simulation Conference (WSC)

Carolina Barbosa, Nicole Mack, Georgiy Bobashev, Grant A King, Yiyan Liu, Rainer Hilscher, Simon Neuwahl, Thomas J Hoerger. (2019). 1536-P: Parametric Survival Analysis of Complications from Type 1 Diabetes. Diabetes, 68(1)

Zule WA, Latypov A, Otiashvili D, Bangel S, Bobashev GV. (2018). Feasibility of needle and syringe programs in Tajikistan distributing low dead space needles. Harm reduction journal, 15(1)

Bobashev G, Tebbe K, Peiper N, Hoffer L. (2018). Polydrug use among heroin users in Cleveland, OH. Drug and alcohol dependence, (192)

Zule WA, Pande PG, Otiashvili D, Bobashev GV, Friedman SR, Gyarmathy VA, Des Jarlais DC. (2018). Options for reducing HIV transmission related to the dead space in needles and syringes. Harm reduction journal, 15(1)

Bobashev G., Sageman M., Evans A.L., Wittenborn J., Chew R.F.. (2018). Turning Narrative Descriptions of Individual Behavior into Network Visualization and Analysis: Example of Terrorist Group Dynamics. International Conference on Social Computing, Behavioral-Cultural Modeling and Prediction and Behavior Representation in Modeling and Simulation

Georgiy Bobashev, Sam Goree, Jennifer Frank, William Zule. (2018). Pain Town, an Agent-Based Model of Opioid Use Trajectories in a Small Community. Social, Cultural, and Behavioral Modeling

Kasey Jones, Joey Morris, Georgiy Bobashev, Sujha Subramanian. (2018). Parameterization and calibration of micro-simulation model for cervical cancer and HIV in Zambia. 2018 Winter Simulation Conference (WSC)

Hang Xiong, Puqing Wang, Georgiy Bobashev. (2018). Multiple peer effects in the diffusion of innovations on social networks: a simulation study. Journal of Innovation and Entrepreneurship, 7(1)

J Lynn Davis, Karmann C Mills, Georgiy Bobashev, Kelley J Rountree, Michael Lamvik, Robert Yaga, Cortina Johnson. (2018). Understanding chromaticity shifts in LED devices through analytical models. Microelectronics Reliability, (84)

J Lynn Davis, Karmann Mills, Mike Lamvik, Eric Solano, Georgiy Bobashev, Curtis Perkins. (2017). Modeling the impact of thermal effects on luminous flux maintenance for SSL luminaires. 2017 16th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm)

Subramanian S, Bobashev G, Morris RJ, Hoover S. (2017). Personalized medicine for prevention: can risk stratified screening decrease colorectal cancer mortality at an acceptable cost?. Cancer causes & control : CCC, 28(4)

Gartlehner G, Schultes MT, Titscher V, Morgan LC, Bobashev GV, Williams P, West SL. (2017). User testing of an adaptation of fishbone diagrams to depict results of systematic reviews. BMC medical research methodology, 17(1)

Lytton WW, Arle J, Bobashev G, Ji S, Klassen TL, Marmarelis VZ, Schwaber J, Sherif MA, Sanger TD. (2017). Multiscale modeling in the clinic: diseases of the brain and nervous system. Brain informatics, 4(4)

Peiper NC, Baumgartner PM, Chew RF, Hsieh YP, Bieler GS, Bobashev GV, Siege C, Zarkin GA. (2017). Patterns of Twitter Behavior Among Networks of Cannabis Dispensaries in California. Journal of medical Internet research, 19(7)

Bonita Kramer, Michael Seda, Georgiy Bobashev. (2017). Current opinions on forensic accounting education. Accounting Research Journal, 30(3)

Pamela A. Matson, Nicholas Ialongo, Shang-en Chung, Georgiy Bobashev, Jonathan M. Ellen. (2017). The romantic relationship context of adolescent marijuana use. Drug and Alcohol Dependence, 100(171)

Ty A Ridenour, Szu-Han K Chen, Hsin-Yi Liu, Georgiy V Bobashev, Katherine Hill, Rory Cooper. (2017). The Clinical Trials Mosaic: Toward a Range of Clinical Trials Designs to Optimize Evidence-Based Treatment. Journal for Person-Oriented Research, 3(1)

Georgiy Bobashev, Barry Eggleston, Robert J. Morris, Carolina Barbosa, William Dowd, Michael L. Dennis, Christy K. Scott. (2017). Impact of recovery interventions on opioid users. A simulation study. Drug and Alcohol Dependence, 100(171)

Bobashev G, Holloway J, Solano E, Gutkin B. (2017). A Control Theory Model of Smoking. Methods report (RTI Press), (2017)

J. Popa, K. Nezafati, Y. R. Gel, J. Zweck and G. Bobashev. (2016). Catching Social Butterflies: Identifying Influential Users of an Event-Based Social Networking Service. 2016 IEEE International Congress on Big Data (BigData Congress)

Georgiy Bobashev, Nicholas G Baldasaro, Karmann C Mills, J Lynn Davis. (2016). An efficiency-decay model for lumen maintenance. IEEE Transactions on Device and Materials Reliability, 16(3)

Goldstein MR, Lewis GF, Newman R, Brown JM, Bobashev G, Kilpatrick L, Seppälä EM, Fishbein DH, Meleth S. Improvements in well-being and vagal tone following a yogic breathing-based life skills workshop in young adults: Two open-trial pilot studies. International journal of yoga, 9(1)

Tueller SJ, Van Dorn RA, Bobashev GV. (2016). Visualization of Categorical Longitudinal and Times Series Data. Methods report (RTI Press), (2016)

Hassmiller Lich K, Frerichs L, Fishbein D, Bobashev G, Pentz MA. (2016). Translating research into prevention of high-risk behaviors in the presence of complex systems: definitions and systems frameworks. Translational behavioral medicine, 6(1)

Zule WA, Oramasionwu C, Evon D, Hino S, Doherty IA, Bobashev GV, Wechsberg WM. (2016). Event-level analyses of sex-risk and injection-risk behaviors among nonmedical prescription opioid users. The American journal of drug and alcohol abuse, 42(6)

Zule WA, Latypov A, Otiashvili D, Kirtadze I, Ibragimov U, Bobashev GV. (2015). Factors that influence the characteristics of needles and syringes used by people who inject drugs in Tajikistan. Harm reduction journal, (12)

Kneipp SM, Leeman J, McCall P, Hassmiller-Lich K, Bobashev G, Schwartz TA, Gilmore R, Riggan S, Gil B. Synthesizing Marketing, Community Engagement, and Systems Science Approaches for Advancing Translational Research. ANS. Advances in nursing science, 38(3)

Georgiy Bobashev, Nicole Seider, Serge Ahmed. (2015). A computation opponent process model describes and predicts cocaine self-administration among naïve rats. Drug and Alcohol Dependence, 100(156)

Bobashev GV, Liao D, Hampton J, Helzer JE. (2014). Individual patterns of alcohol use. Addictive behaviors, 39(5)

Garbutt JC, Greenblatt AM, West SL, Morgan LC, Kampov-Polevoy A, Jordan HS, Bobashev GV. (2014). Clinical and biological moderators of response to naltrexone in alcohol dependence: a systematic review of the evidence. Addiction (Abingdon, England), 109(8)

Alexey Kampov;Polevoy, Leslie Lange, Georgiy Bobashev, Barry Eggleston, Tammy Root, James C Garbutt. (2014). Sweet‐Liking Is Associated with Transformation of Heavy Drinking into Alcohol‐Related Problems in Young Adults with High Novelty Seeking. Alcoholism: Clinical and Experimental Research, 38(7)

Bobashev G, Norton J, Wechsberg W, Toussova O. (2014). Are you HIV invincible? A probabilistic study of discordant couples in the context of HIV transmission. PloS one, 9(5)

Heard D, Bobashev GV, Morris RJ. (2014). Reducing the complexity of an agent-based local heroin market model. PloS one, 9(7)

Jonas DE, Amick HR, Feltner C, Bobashev G, Thomas K, Wines R, Kim MM, Shanahan E, Gass CE, Rowe CJ, Garbutt JC. (2014). Pharmacotherapy for adults with alcohol use disorders in outpatient settings: a systematic review and meta-analysis. JAMA, 311(18)

Bobashev G. (2014). myEpi. Epidemiology of One. Frontiers in public health, (2)

J Lynn Davis, Karmann Mills, Mike Lamvik, Robert Yaga, Sarah D Shepherd, James Bittle, Nick Baldasaro, Eric Solano, Georgiy Bobashev, Cortina Johnson, Amy Evans. (2014). System reliability for LED-based products. 2014 15th International Conference on Thermal, Mechanical and Mulit-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE)

M Yazdan Mehr, Willem D van Driel, GQ Zhang. (2014). Reliability and accelerated test methods for plastic materials in LED-based products. 2014 15th International Conference on Thermal, Mechanical and Mulit-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE)

J Lynn Davis, Michael Lamvik, James Bittle, Sarah Shepherd, Robert Yaga, Nick Baldasaro, Eric Solano, Georgiy Bobashev. (2013). Insights into accelerated aging of SSL luminaires. LED-based Illumination Systems, (8835)

Zule WA, Bobashev GV, Reif SM, Poulton W, Coomes CM, Wechsberg WM. (2013). Results of a pilot test of a brief computer-assisted tailored HIV prevention intervention for use with a range of demographic and risk groups. AIDS and behavior, 17(9)

Garge NR, Bobashev G, Eggleston B. (2013). Random forest methodology for model-based recursive partitioning: the mobForest package for R. BMC bioinformatics, (14)

Eric Solano, Robert J Morris, Georgiy V Bobashev. (2013). Coupling models by routing communication through a database. RTI International

Wechsberg WM, Krupitsky E, Romanova T, Zvartau E, Kline TL, Browne FA, Ellerson RM, Bobashev G, Zule WA, Jones HE. (2012). Double jeopardy--drug and sex risks among Russian women who inject drugs: initial feasibility and efficacy results of a small randomized controlled trial. Substance abuse treatment, prevention, and policy, (7)

Lee Hoffer, Georgiy Bobashev, Robert J Morris. (2012). Simulating patterns of heroin addiction within the social context of a local heroin market. Computational Neuroscience of Drug Addiction, (10)

David B Newlin, Phillip A Regalia, Thomas I Seidman, Georgiy Bobashev. (2012). Control theory and addictive behavior. Computational Neuroscience of Drug Addiction

Neumark Y, Lopez-Quintero C, Bobashev G. (2012). Drug use opportunities as opportunities for drug use prevention: Bogotá, Colombia a case in point. Drug and alcohol dependence, 122(1-2)

Georgiy Bobashev, Maureen L Cropper, Joshua M Epstein, D Michael Goedecke, Stephen Hutton, Mead Over. (2011). Policy Response to Pandemic Influenza: The Value of Collective Action. The National Bureau of Economic Research

Namasivayam Ambalavanan, Michele Walsh, Georgiy Bobashev, Abhik Das, Burton Levine, Waldemar A. Carlo, Rosemary D. Higgins and for the NICHD Neonatal Research Network. (2011). Intercenter Differences in Bronchopulmonary Dysplasia or Death Among Very Low Birth Weight Infants. Pediatrics, 127(1)

Subramanian S, Bobashev G, Morris RJ. (2010). When budgets are tight, there are better options than colonoscopies for colorectal cancer screening. Health affairs (Project Hope), 29(9)

Huang SS, Avery TR, Song Y, Elkins KR, Nguyen CC, Nutter SK, Nafday AA, Condon CJ, Chang MT, Chrest D, Boos J, Bobashev G, Wheaton W, Frank SA, Platt R, Lipsitch M, Bush RM, Eubank S, Burke DS, Lee BY. (2010). Quantifying interhospital patient sharing as a mechanism for infectious disease spread. Infection control and hospital epidemiology, 31(11)

Bobashev G.V., Morris R.J., Zule W.A.. (2010). Projecting Sexual and Injecting HIV Risks into Future Outcomes with Agent-Based Modeling. Advances in Social Computing, (6007)

Georgiy V Bobashev, Robert J Morris. (2010). Uncertainty and inference in agent-based models. 2010 Second International Conference on Advances in System Simulation

Georgiy V Bobashev, William A Zule. (2010). Modeling the effect of high dead‐space syringes on the human immunodeficiency virus (HIV) epidemic among injecting drug users. Addiction, 105(8)

Georgiy V Bobashev, Robert J Morris, William A Zule, Andrei V Borshchev, Lee Hoffer. (2009). The Use of Agent-based Modeling in Projecting risk factors into the future. Social Computing and Behavioral Modeling

Georgiy V Bobashev, Stephen P Ellner, Douglas W Nychka, Bryan T Grenfell. (2009). Reconstructing susceptible and recruitment dynamics from measles epidemic data. Mathematical Population Studies, 8(1)

Hoffer LD, Bobashev G, Morris RJ. (2009). Researching a local heroin market as a complex adaptive system. American journal of community psychology, 44(3-4)

Bobashev GV, Zule WA, Osilla KC, Kline TL, Wechsberg WM. (2009). Transactional sex among men and women in the south at high risk for HIV and other STIs. Journal of urban health : bulletin of the New York Academy of Medicine, (86 Suppl 1)

Zule WA, Bobashev GV, Wechsberg WM, Costenbader EC, Coomes CM. (2009). Behaviorally bisexual men and their risk behaviors with men and women. Journal of urban health : bulletin of the New York Academy of Medicine, (86 Suppl 1)

Georgiy V Bobashev, James C Anthony. (2009). Use of alternating logistic regression in studies of drug-use clustering. Substance Use & Misuse, 35(6-8)

Subramanian S, Bobashev G, Morris RJ. (2009). Modeling the cost-effectiveness of colorectal cancer screening: policy guidance based on patient preferences and compliance. Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology, 18(7)

William A Zule, Georgiy Bobashev. (2009). High dead-space syringes and the risk of HIV and HCV infection among injecting drug users. Drug and Alcohol Dependence, 100(3)

Bobashev G, Morris RJ, Goedecke DM. (2008). Sampling for global epidemic models and the topology of an international airport network. PloS one, 3(9)

Fishbein DH, Krupitsky E, Flannery BA, Langevin DJ, Bobashev G, Verbitskaya E, Augustine CB, Bolla KI, Zvartau E, Schech B, Egorova V, Bushara N, Tsoy M. (2007). Neurocognitive characterizations of Russian heroin addicts without a significant history of other drug use. Drug and alcohol dependence, 90(1)

Wright DA, Bobashev G, Folsom R. Understanding the relative influence of neighborhood, family, and youth on adolescent drug use. Substance use & misuse, 42(14)

D Michael Goedecke, Georgiy V Bobashev, Feng Yu. (2007). A stochastic equation-based model of the value of international air-travel restrictions for controlling pandemic flu. 2007 Winter Simulation Conference

Georgiy V Bobashev, D Michael Goedecke, Feng Yu, Joshua M Epstein. (2007). A Hybrid Epidemic Model: Combining The Advantages Of Agent-Based And Equation-Based Approaches. 2007 Winter Simulation Conference

Ahmed SH, Bobashev G, Gutkin BS. (2007). The simulation of addiction: pharmacological and neurocomputational models of drug self-administration. Drug and alcohol dependence, 90(2-3)

Bobashev G, Costenbader E, Gutkin B. (2007). Comprehensive mathematical modeling in drug addiction sciences. Drug and alcohol dependence, 89(1)

Epstein JM, Goedecke DM, Yu F, Morris RJ, Wagener DK, Bobashev GV. (2007). Controlling pandemic flu: the value of international air travel restrictions. PloS one, 2(5)

Wehby GL, Castilla EE, Goco N, Rittler M, Cosentino V, Javois L, McCarthy AM, Bobashev G, Litavecz S, Mariona A, Dutra G, López-Camelo JS, Orioli IM, Murray JC. (2006). Description of the methodology used in an ongoing pediatric care interventional study of children born with cleft lip and palate in South America [NCT00097149]. BMC pediatrics, (6)

Douglas Wright, Georgiy V Bobashev, Scott P Novak. (2005). Decomposing the total variation in a nested random effects model of neighborhood, household, and individual components when the dependent variable is dichotomous: implications for adolescent marijuana use. Drug and Alcohol Dependence, 78(2)

Ambalavanan N, Carlo WA, Bobashev G, Mathias E, Liu B, Poole K, Fanaroff AA, Stoll BJ, Ehrenkranz R, Wright LL, . (2005). Prediction of death for extremely low birth weight neonates. Pediatrics, 116(6)

Wechsberg WM, Lam WK, Zule WA, Bobashev G. (2004). Efficacy of a woman-focused intervention to reduce HIV risk and increase self-sufficiency among African American crack abusers. American journal of public health, 94(7)

GV Bobashev, S Das, A Das. (2002). Experimental design for gene microarray experiments and differential expression analysis. Methods of Microarray Data Analysis II

Jorge Delva, Georgiy Bobashev, Gonzalo González, Miguel Cedeño, James C Anthony. (2000). Clusters of drug involvement in Panama: results from Panama's 1996 National Youth Survey. Drug and Alcohol Dependence, 60(3)

GV Bobashev, JC Anthony. (1998). Clusters of marijuana use in the United States. American Journal of Epidemiology, 148(12)

Ellner SP, Bailey BA, Bobashev GV, Gallant AR, Grenfell BT, Nychka DW. (1998). Noise and nonlinearity in measles epidemics: combining mechanistic and statistical approaches to population modeling. The American naturalist, 151(5)

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