His research provides new methodological approaches to model and measure complicated economic behaviors and outcomes.

His work also focuses on the role that econometrics plays in policy issues, such as market regulation, market transition, and deterrence versus preventive measures in the criminal justice system.

After graduating from Georgia Institute of Technology in 1972 (B.S., Economics), he earned a Ph.D. in Economics in 1976 from the University of North Carolina, Chapel Hill.

He has co-authored and edited eleven books, volumes, journal special issues related to applied econometric topics, over 100 articles in peer-reviewed journals, and over 50 chapters in handbooks and other volumes.

[1][2][3] His most recent major work is Measurement of Productivity and Efficiency: Theory and Practice ( with Valentin Zelenyuk.