<%@LANGUAGE="JAVASCRIPT" CODEPAGE="65001"%> Publications

PUBLICATIONS

"On the Efficiency of the Almon Lag Technique," with P. Schmidt, International Economic Review 16, l975, 792-795.

"Some Further Evidence on the Use of the Chow Test Under Heteroskedasticity," with P. Schmidt, Econometrica 46, l977, l293-l298.

"Simultaneous Equations Models With Truncated Dependent Variables:  A Simultaneous Tobit Model," with P. Schmidt, Journal of Economics and Business 30, l978, 11-21.

"An Analysis of Time Sentenced After Release From Prison," with P. Schmidt and A. Witte, in Proceedings of the Criminal Justice Statistics Association, Minneapolis, Minn., August, l978.

"An Application of the Simultaneous Tobit Model:  A Study of the Determinants of Criminal Recidivism," with P. Schmidt and A. Witte, Journal of Economics and Business 31, l979, l66-l7l.

"A Random Coefficient Probit Model With an Application to a Study of Migration," with J. Akin and D.K. Guilkey, Journal of Econometrics 11, l979, 233-246.

"Short-and Long-Run Effects of Minimum Wages on the Distribution of Earnings, (with J. Behrman and P. Taubman), Report of the Minimum Wage Study Commission, Volume VII: Effects of the Minimum Wage on the Distribution of Income, Washington:  Government Printing Office, l98l, 63-111.

"Assessing the Impact of Varying Economic Conditions on Federal Reserve Behavior," with J. Barth and P. Wiest, Journal of Macroeconomics 4, l982, 47-70.

"Testing Efficiency Hypotheses in Joint Production: A Parametric Approach," with C.A.K. Lovell, Review of Economics and Statistics 65, l983, 5l-58.

"A Comparison of the Performance of Three Flexible Functional Forms," with D.K. Guilkey and C.A.K. Lovell, International Economic Review 24, l983, 59l-6l6.

"The Impact of Minimum Wages on the Distributions of Earnings for Major Race-Sex Groups: A Dynamic Analysis," with J. Behrman and P. Taubman, American Economic Review 73, l983, 766-778.

"Production and Final Demand Price Determination Within a Singular Equation System of Relative Prices," with S. Thurman, Journal of Policy Modeling 5, l983, l25-l48.

"Production Frontiers and Panel Data," with P. Schmidt, Journal of Business and Economic Statistics 2, l984, 367-374.

"The CES-translog: Specification and Estimation of a New Cost Function," with R. Pollak and T. Wales, Review of Economics and Statistics 67, l984, 602-607.

"A Nonlinear Multivariate Error Components Analysis of Technology and Specific Factor Productivity Growth with an Application to the U.S. Airlines," Journal of Econometrics 27, l985, 61-78.

"An Analysis of Youth Crime and Employment Patterns," with D. Good and M. Pirog-Good," Journal of Quantitative Criminology 2, l986, 219-235.

"An Analysis of the Health and Retirement Status of the Elderly," with P. Taubman, Econometrica 54, l986, 1339-1356.

"Allocative Distortions and the Regulatory Transition of the U.S. Airline Industry," with D. Good and R. Johnson, Journal of Econometrics 33, l986, 143-163.

"Union Wage, Hours and Earnings Differentials in the Construction Industry," with J. Perloff, Journal of Labor Economics 5, l987, l74-210.

"Allocative Inefficiency in the U.S. Airlines:  A Case for Deregulation," in Studies in Productivity Analysis, Vol. 7, edited by Ali Dogramaci, Boston:  Kluwer-Nijhoff, l987, l49-l62.

"Age Specific Death Rates," with J. Behrman and P. Taubman, in Issues in Contemporary Retirement, edited by E. Lazear and Ricardo-Campbell. Stanford: Hoover Institution Press, March, l988, 162-190.

"The Effect of Unionization on Labor Productivity: Some Additional Evidence," with C.A.K. Lovell and R. Warren, Journal of Labor Research, 9, l988, 55-63.

"Testing for Aggregation Bias in Efficiency Measurement," with C. A. Knox Lovell, in Measurement in Economics:  Theory and Applications of Economic Indices, edited by W. Eichhorn, Wurzburg and Vienna: Physica-Verlag, l988, l87-206.

"Productivity in the Natural Gas Transmission Industry:  Evidence on the Impact of the Natural Gas Policy Act," with Mary Streitwieser, in Competition, Profitability, and Policy in the Energy Industry, Proceedings of the Tenth American Conference of the International Association for Energy Economics, l988.

"An Analysis of Simultaneous Limited Dependent Variable Models and Some Nonstandard Cases," in Advances in Statistical Analysis and Statistical Computing, Theory and Applications, Vol. 2, edited by Roberto Mariano, Greenich:  JAI Press, Inc., l989, 85-122.

"Technology Transfer and Diffusion in Developing Agricultural Sectors," with M. Nerlove and S. Vosti, in Methodology in Socioeconomic Evaluation of Agricultural Research, EMPRAPA, Brazil, 1989.

"Finite Sample Properties of Stochastic Frontier Models Using Panel Data," with Byeong-Ho Gong, Journal of Productivity Analysis 1, l989, 229-261.

"Survivor Functions with Covariates: Sensitivity to Sample Length, Functional Form and Unobserved Frailty," with J. Behrman and P. Taubman, Demography, 27, 1990, 267-284.

"Production Frontiers with Cross-Sectional and Time Series Variation in Efficiency Levels," with C. Cornwell and P. Schmidt, Journal of Econometrics 46, 1990, 185-200.

"XploR-ing the World of Nonparametric Analysis," with Pin Ng, Journal of Applied Econometrics, Software Reviews, 5, 1990.

"A Profile of Illegal Drug Users," with Paul Taubman, American Economic Review 81, 1991, 248-251.

"The Structure of Production and Technical Change in a Multiproduct Firm: An Application to U. S. Airlines," with D. Good and M. Ishaq Nadiri, National Bureau of Economic Research Working Paper No. 3939, Cambridge, l991.

"A Comparison Between Stochastic Frontier and Data Envelopment Methods Using Panel Data," with Byeong-Ho Gong, Journal of Econometrics 51, 1992, 259-284.

"Black-White Differentials in Mortality: Results from the Retirement History Survey," with J. Behrman, P. Taubman, and A. Yazbeck, Journal of Econometrics 50, 1992, 183-204.

"The CET-CES-Generalized Leontief Profit Function: An Application to Indian Agriculture," with J. Behrman, C.A.K. Lovell and R.A. Pollak, Oxford Economic Papers 44, 1992. 341-354.

"Technical Inefficiency and Productive Decline in the U.S. Interstate Natural Gas Pipeline Industry Under the U.S. Interstate Natural Gas Policy Act," with M. Streitwieser, Journal of Productivity Analysis, special issue edited by A. Lewin and C.A.K. Lovell, 3, 1992, 115-130; reprinted in International Applications for Productivity and Efficiency Analysis, edited by Thomas R. Gulledge, Jr. and C.A. Knox Lovell, Boston: Kluwer Academic, 1992.

"Efficiency and Productivity Growth Comparisons of European and U.S. Air Carriers: A First Look at the Data," with D. Good, M.I. Nadiri, and Lars-Hendrik Roller, Journal of Productivity Analysis 4, special issue edited by J. Mairesse and Z. Griliches, 1993, 115-125.


"U.S. Airline Deregulation: Implications for European Transport," with David H. Good and Lars-Hendrik Roller, Economic Journal 103, 1993, 1028-1041.Reprinted in Recent Developments in Transport Economics, edited by Kenneth Button, Northhampton, MA: Edward Elgar Publishing, 2003.

"EC Integration and the Structure of the Franco-American Airline Industries: Implications for Efficiency and Welfare," with D. Good and H. Roller, in Models and Measurement of Welfare and Inequity, edited by W. Eichhorn, Heidelberg: Physica-Verlag, 1994, 643-665.

"Changes in VA Hospital Use Since 1980: Unanswered Question," with C. Ashton, T. Weiss, N. Petersen, N. Wray, and T. Menke, Medical Care 32, 1994, 447-458.

"Product Diversification, Economies of Scope, and Risk Avoidance: An Application to Indian Agriculture," with M. Ballivian, Journal of Productivity Analysis 5, 1994, 271-286.

"Estimation of the Duration Model by Nonparametric Maximum Likelihood, Maximum Penalized Likelihood and Probability Simulators," with K. Huh, Review of Economics and Statistics 75, 1994, 683-694.

"Airline Efficiency Differences Between Europe and the U.S.: Implications for the Pace of E.C. Integration and Domestic Regulation," with David H. Good and Lars-Hendrik Roller, European Journal of Operational Research 80, 1995, 508-518.

“Estimation of the Duration Model by Maximum Penalized Likelihood,” with A. Postert and K. Huh, Journal of the American Statistical Association, Papers and Proceedings, 1995, 11-20.

“Index Number and Factor Demand Approaches to the Estimation of Productivity,” Chapter 1 of the Handbook of Applied Economics, Volume II-Microeconometrics, with D. Good and M. I. Nadiri, edited by M. H. Pesaran and P. Schmidt, Oxford: Basil Blackwell, 1997, 14-80, reprinted as National Bureau of Economic Research Working Paper # 5790, 1996, Cambridge, MA.

"Competition and Efficiency in the European Airline Industry: 1976-1990," with P. Captain, Managerial and Decision Economics, 18, 1997, 209-225.

“Computation and Inference in Semiparametric Efficient Estimation,” with R. Adams and A. Berger, Computational Approaches to Economic Problems, Advances in Computational Economics, edited by Hans Amman, Berc Rustem and Andrew Whinston, Boston: Kluwer Academic, 1997, 57-70.

"Mortality and Morbidity Among Adults and the Elderly," Chapter 11 of the Handbook of Population and Family Economics, with Paul Taubman, edited by Mark R. Rosenzweig and Oded Stark, Amsterdam: North-Holland, 1997, 559-643.

“The Relationship Between Stock Market Returns and Technical Efficiency Innovations: Evidence from the US Airline Industry,” with Ila M. Semenick Alam, Journal of Productivity Analysis, 9, 1998, 35-51.

"Stochastic Panel Frontiers: A Semiparametric Approach," with Byeong Park and Leopold Simar, Journal of Econometrics, 84, 273-301, 1998.

“Maximum Penalized Likelihood Estimation of Mixed Proportional Hazard Models,” with K. Huh and A. K. Postert, Communications in Statistics: Theory and Methods, 27, 1998, 2143-2164.

"On the Dynamics of Demand for Leisure and Production of Health: Evidence from the Retirement History Survey," with Abdo S. Yazbeck, Journal of Business and Economic Statistics, 1998, 16, 187-197.

"The Structure of Technology, Substitution and Productivity in the Interstate Natural Gas Transmission Industry Under the Natural Gas Policy Act of l978," with M. Streitwieser, Journal of Applied Econometrics, 13, l998, 377-395.

“Assessing the Relative Efficiency of Asian and North American Airline Firms," with D. Good, and S. Ahn, Economic Efficiency and Productivity Growth in the Asia Pacific Region, Chapter 4, Tsu‑tan Fu, Cliff J. Huang, C. A. K. Lovell (eds.), UK: Edward Elgar Publishing Limited, 1998, 65-89.

"Air Liberalization: the Record in Europe," with A. Postert, Taking Stock of Air Liberalization, Chapter 3, M. Gaudry and R. Mayes (ed.), Boston: Kluwer Academic, 1998, 39-59.

“A Model of World Aircraft Demand,” with D. Good, A. K. Postert, and L. Getachew, Proceedings of the 25th International Air Transport Conference, Austin, Texas, 1998.

“Causes and Consequences of Expert Disagreement: Methodological Lessons From the U.S. V. AT&T Debate,” with C. A. K. Lovell, in The Role of the Academic Economist in Litigation Support, Amsterdam: North-Holland, 1999, 189-206.

"Semiparametric Approaches to Stochastic Panel Frontiers with Applications to the Banking Industry," with Robert M. Adams and Alan Berger, Journal of Business and Economic Statistics, 17, 1999, 349-358.

“Technology Adoption and Efficiency,” with P. Hultberg, and M. Ishaq Nadiri, Annales d’Economie et de Statistique, Special Issue on the Econometrics of Panel Data, 55-56, 1999, 449-474.

"A Time Series Analysis of Deregulatory Dynamics and Technical Efficiency: The Case of the U. S. Airline Industry," with Ila M. Semenick Alam, International Economic Review, 41, 2000, 203-218.

“Capacity and Product Market Competition: Measuring Market Power in a ‘Puppy-Dog’ Industry,” with Lars-Hendrik Röller, International Journal of Industrial Organization, 18, 2000, 845-865.

“Estimation of Long-Run Inefficiency Levels: a Dynamic Frontier Approach, with S. Ahn and D. Good, Econometric Reviews, 19, 2000, 461-492.

“On ‘Productivity of the U. S. Agricultural Sector: the Case of Undesirable Outputs by Ball, Fare, Grosskoph, and Nehring’,” New Directions in Productivity Analysis, Chicago: University of Chicago Press for the NBER, C. Hulten, E. Dean, and M. Harper, (eds.), 2001, 577-585.

Scale Economies, Scope Economies, and Technical Change in Federal Reserve Payment Processing

“Time Series Analysis of Strategic Pricing Behavior in the US Airline Industry,” with I. Semenick Alam and L. Ross, Journal of Productivity Analysis, 16, 2001, 49-62.

“Municipal Water Demand Estimation: Evaluation of the Stone-Geary Form Using Panel Data,” with S. Gaudin Hultberg and R. Griffin, Land Economics, 77, 2001, 399-422.

“A Model of Optimal Dynamic Extraction from a Large Middle Eastern Field,” with P. Hartley, Journal of Productivity Analysis, 2001, 15, 59-71.

 “Convergent Economies: Implications For World Energy Use,” with P. Hultberg, in Unlocking the Assets: Energy and the Future of Central Asia and the Caucasus: A Political, Economic, and Cultural Analysis, Y. Kalyuzhnova, A. Jaffe, D. Lynch, R. Sickles (ed.), Hampshire: Palgrave (2001), 169-192.

“An Analysis of the Crime as Work Model: Evidence from the 1958 Philadelphia Birth Cohort Study,” with J. Williams, Journal of Human Resources, 37 (2002): 479-509.

“Specification of Distance Functions Using Semi-and Nonparametric Methods With An Application to the Dynamic Performance of Eastern and Western European Air Carriers,” with L. Getachew and D. Good, Journal of Productivity Analysis, Special Issue in Honor of W. W. Cooper, (2002): 133-155.

“An Analysis of Market Power in the U. S. Airline Industry, with J. Perloff and J. Weiher,” in Measuring Market Power, edited by D. Slottje, Amsterdam: North-Holland, 2003, 309-323.

“Semiparametric Efficient Estimation of Panel Models with AR(1) Errors,” with B. Park, and L. Simar, Journal of Econometrics, 117, 2003, 279-309.

“Semi-and Nonparametric Measurement of Productivity in Federal Reserve Payment Processing,” with R. Adams and P. Bauer, Journal of Money, Credit, and Banking, 36, 943-958, 2004.

“Heterogeneous Rates of Catch-Up in Manufacturing Industries,” with M. I. Nadiri and P. Hultberg, Empirical Economics, 29, 753-768, 2004.

“The Role of Environmental Factors in Growth Accounting,” with B. Jeon, Journal of Applied Econometrics, 19, 567-591, 2004.

“Functional Data Analysis and Mixed Effect Models,” with Alois Kneip and Wonho Song, COMPSTAT 2004-Proceedings in Computational Statistics, J. Anoch (ed.), Springer Verlag, New York, 315-326, 2004.

“Panel Estimators and the Identification of Firm-Specific Efficiency Levels in Semi-Parametric and Non-Parametric Settings,” Journal of Econometrics, 126, 305-324, 2005.

"An Intertemporal Model of Rational Criminal Choice," with J. Williams, Panel Data Econometrics: Theoretical Contributions and Empirical Applications, Badi H. Baltagi, editor, Elsevier Science, Amsterdam, 135-166, 2006.

“Semiparametric Efficient Estimation of Dynamic Panel Data Models,” with B. Park and L. Simar, Journal of Econometrics, 136, 281-301, 2007.

“Allocative Distortions and Technical Efficiency Change in Egypt’s Private Sector Manufacturing Industries: 1987-1996,” with Lullit Getachew, Journal of Applied Econometrics, 22, 703-728, 2007.

“Productivity ? of U . S. Airlines After Deregulation,” with S. Grossgopf and R. Fare, the Journal of Transport Economics and Policy, 41, 93-112, 2007.

“What if the European Airline Industry had Deregulated in 1979?: A Counterfactual Dynamic Simulation,” with Purvez Captain, David H. Good, and Ashok Ayyar, Chapter 5 in Volume 2: The Economics of Airline Institutions, Operations and Marketing, Edited by Darin Lee, Amsterdam: Elsevier, North Holland, 2007.

“Semi-parametric Efficient Distribution Free Estimation of Panel Models,” with Robert Adams, Communication in Statistics: Theory and Methods, 36, 2425–2442, 2007.


“Comments on Panel Data Analysis-Advantages and Challenges by Cheng Hsiao,” Test, 16, 31-32, 2007.

“A Dynamic Model of Airline Competition,” with Ying Fang, Journal of Network Economics, 6, 355-371,
2007.

 “The Role of Social Capital in Youth Crime: A Dynamic Structural Approach,” with J. Williams, Journal of Econometrics, forthcoming, 2008.

“The Aviation Industry, in the International Encyclopedia of the Social Sciences 2nd Edition
(William Darity, Editor), New York: Macmillan,forthcoming, 2008.

“Energy Economics,” with Ying Fang, forthcoming in The New Palgrave Dictionary of Economics,
2nd Edition
, Edited by Larry Blume and Steven Durlauf, Palgrave MacMillian, Ltd, 2008.

“A Hedonic Price Index for Airline Travel,” with D. Good and J. Weihe, Review of Income and Wealth, 54, 438-465, 2008.

“Introduction to the Special Issue of the Journal of Econometrics on The Use of Econometrics to Inform Public Policy Makers,” with Jenny Williams, Journal of Econometrics, 145, 1-3, 2008.

“Turning from Crime: A Dynamic Perspective,” with Jenny Williams, Journal of Econometrics, 145, 158-173, 2008.

“Optimal Dynamic Production Policy: The Case of a Large Oil Field in Saudi Arabia,” with W. Gao and P. Hartley, Empirical Economics, 37, 153-184, 2009.

“An Analysis of Strategic Behavior and Consumer Surplus in eBay Auctions,” with K. Hasker and R. Gonzalez, Special Issue on the Econometric Analysis of Panle Data (edited by Jan Kiviet), Singapore Economic Review, 54, 441-472, 2009.

“Krugman and Young Revisited: A Survey of Sources of Productivity Growth in a World with Less Constraints,” with Burcu Cigerli, Seoul Journal of Economics, 22, 29-54, 2009.

“The Skewness Problem in Stochastic Frontier Models: Fact or Fiction?”, with Pavlos Almanidis, forthcoming in Exploring Research Frontiers in Contemporary Statistics and Econometrics: A Festschrift in Honor of Leopold Simar, Ingrid Van Keilegom and Paul Wilson (eds.), Springer Publishing: New York, 2010.

“Panel Data, Factor Models, and the Solow Residual,” with Alois Kneip, forthcoming in Exploring Research Frontiers in Contemporary Statistics and Econometrics: A Festschrift in Honor of Leopold Simar, Ingrid Van Keilegom and Paul Wilson (eds.), Springer Publishing: New York, 2010.

"The Impact of Knowledge Accumulation and Geographical Spillovers on Productivity and Efficiency: The Case of U. S. Shipbuilding during WWII" with David Blazek, Economic Modelling, Vol 27,Issue 6, November 2010.

“eBay in the Economic Literature: Analysis of an Auction Marketplace,” with Kevin Hasker, Review of Industrial Organization, 37, August, 3-42, 2010.

“Health, Mental Health and Labor Productivity: The Role of Self-Reporting Bias,” with Justin Leroux and John Rizzo, forthcoming in Empirical Economics, 2010.

“A New Panel Data Treatment for Heterogeneity in Time Trends,” with A. Kneip and W.H. Song, forthcoming in Econometric Theory, 2011.

"A New Panel Data Treatment for Heterogeneity in Time Trends (Tables 1-12)" with A. Kneip and W.H. Song, forthcoming in Econometric Theory, 2011.

"A Multi-product Cost Function for Physician Private Practices," with Tim Gunning, forthcoming, Journal of Productivity Analysis, Volume 35, No. 2, 2011.

"Estimation of Market Power in the Presence of Level Inefficiencies," with Levent Kutlu, forthcoming, Journal of Econometrics, 2011.

BOOKS/MONOGRAPHS/EDITED VOLUMES

The Causes, Correlates and Consequences of Death Among Older Adults: Some Methodological Approaches and Substantive Analysis, with J. Behrman and P. Taubman, Boston: Kluwer Academic, l998, 1-186.

Unlocking the Assets: Energy and the Future of Central Asia and the Caucasus: A Political, Economic, and Cultural Analysis, with Y. Kalyuzhnova, A. Jaffe, D. Lynch (eds.), Hampshire: Palgrave (2001).

Special Issue of the Journal of Productivity Analysis on Entrepreneurship, Innovation, and Market Dynamics, with David Audretsch and Christos J. Panzios (eds.), Springer, 2005.

Special Issue of the Journal of Econometrics on The Use of Econometrics to Inform Public Policy Makers, with Jenny Williams (ed.), Volume 145, Issues 1-2, Elsevier/North-Holland: Amsterdam, July 2008, 1-257.

Special Annals Issue of the Journal of Econometrics on The Econometrics of Auctions and Games, with Subal Kumbhakar (ed.), Elsevier/North-Holland: Amsterdam, forthcoming, 2011.


PAPERS SUBMITTED OR UNDER REVISION:

“Estimating Consumer Surplus in e-Bay Computer Monitor Auctions,” with T. Giray, K. Hasker, and Bibo Jiang, mimeo, Rice University, 2009.

“Bootstrapping Unit Root Tests with Covariates,” with Y. Chang and W. Song, 2009.

"Competition and Market Power in Physician Private Practices," with Timothy Gunning, mimeo, Rice University, 2009.

“Stochastic Frontiers with Bounded Inefficiency,” with Pavlos Alminidis and Junhui Qian, mimeo, Rice University, 2009.

“How Efficiently Do U.S. Cities Manage Roadway Congestion?”, with Anthony J. Glass and Karligash Kenjegalievayand, Rice University, 2010.

“The Economic Case for the Spatial Error Model with an Application to State Vehicle Usage in the U.S.”, with Anthony J. Glass and Karligash Kenjegalievayand, Rice University, 2012.

 

WORKING PAPERS/BOOK PROJECTS/EDITED VOLUMES/WORK IN PROGRESS:

Convergence, Regulatory Distortions, Deregulatory Dynamics and The Recent Growth Experiences of Economies in Brazil and Latin America: Hope for the Future?, monograph, with Fernando Orozco Ruiz, Patrik Hultberg, Joya Mukerjie, 2002.

Semiparametric Treatments to Panel Data Models with Applications to Productive Efficiency, Basil-Blackwell, 2008.

Chinese Growth, Energy, and Geopolitics, with Amy Jaffe and Stephen Lewis, Baker Institute for Public Policy, 2008.

The Econometrics of Production Analysis, with Valentin Zelenyuk, 2008.

Special Symposium in the Journal of Productivity Analysis on “Agricutural Productivity in Developing Countries,” with David Schimmelpfennig, Springer, 2007.

Special Symposium in the Journal of Productivity Analysis on “Productivity in Sports,” with H. Fried and R. Simmons, Springer, 2010.

“Panel models with temporal heterogeneity in effects and correlated errors,” with Oualid Bada and Alois Kneip, Rice University, 2010.

“Series Estimation of Production Functions with Constraints,” with Ximing Wu, Rice University, 2010.

“Measuring World Productivity,” with Meryem Duygun Fethi, Jiaqi Hao, Anders Isaksson, Rice University, 2010.

“Efficiency and Productivity Analysis in the Airlines Industry,” with Meryem Duygun Fethi, Mohamed Shaban, Thomas Weyman-Jones, Rice University, 2011.

“Measuring Efficiency: A Kalman Filter Approach,” with M. Fethi and L. Kutlu, Rice University, 2011.

“On Measuring Treatment Effects without Randomization,” with P.A.V.B. Swamy, and Ronghua Gao, Rice University, 2011.

“A Spline Function Specification of the CSS (1990) Time-varying Technical Inefficiency Model,” with P. Almanidis and G. Karagiannis, Rice University, 2011.

“Analyzing Bank Efficiency: Are “too-big-to-fail” Banks Efficient?,” with H. Inanoglu and M. Jacobs, Jr., Rice University, 2011.

“Propensity scoring approaches to address problems with two-stage dea and stochastic frontier analyses,” with P. Demchuk, Rice University, 2011.