Books

• Applied Nonparametric Econometrics, with Christopher F. Parmeter, Cambridge University Press, 2015

Journal Articles

• "Accounting for Two-Club Convergence," with R. Robert Russell, Journal of Productivity Analysis, forthcoming
  
• "Do Participation Rates Vary with Participation Payments in Laboratory Experiments?" with Cary Deck and Huizhen Zhong, Experimental Economics, forthcoming Replication Materials
• "Unifying Estimation and Inference for Linear Regression with Stationary and Integrated or Near-Integrated Variables," with Shaoxin Hong, Jiancheng Jiang and Qingshan Ni, Journal of Financial Econometrics, forthcoming UND Webinar
• "Production Analysis with Asymmetric Error", with Oleg Badunenko, Journal of Productivity Analysis, 2024, 61, 1-18 [lead article]  Supplementary Material ​
• "A Complete Framework for Model-Free Difference-in-Differences Estimation," with Stefan Sperlich, Foundations and Trends in Econometrics, 2023, 12, 232–323 R Package | Stata Package | Final Working Paper Version | IZA Working Paper Version
• "Bandwidth Selection for Kernel Density Estimation of Fat-Tailed and Skewed Distributions", with Alecos Papadopoulos and Christopher F. Parmeter, Journal of Statistical Computation and Simulation, 2023, 93, 2110-2135 Technical Appendix
• "Does One Size Fit All in the Non-profit Donation Production Function?", with Teresa D. Harrison, Christopher A. Laincz and Deniz Ozabaci, Oxford Bulletin of Economics and Statistics, 2023, 82, 373-402 Appendix
• "Estimation of a Varying Coefficient, Fixed-Effects Cobb-Douglas Production Function in Levels", with Taining Wang, Economics Letters, 2022, 213, 110354 Appendix | R Package
• "Nonparametric Multi-Dimensional Fixed Effects Panel Data Models", with Juan M. Rodriguez-Poo and Alexandra Soberon, Econometric Reviews, 2022, 41, 321-358
• "Nonparametric Estimation of Unrestricted Distributions and their Jumps", with Carlos Martins-Filho and Kairat Mynbaev, Canadian Journal of Statistics, 2022, 50, 638-662 Layman's abstract
• "Minimum Wage Changes Across Provinces in China: Average Treatment Effects on Employment and Investment Decisions", with Ji Luo, Journal of Risk and Financial Management, 2021, 14, 22
• "Higher-Order Risk-Returns to Education", with Anne-Charlotte Souto and Le Wang, Journal of Risk and Financial Management, 2020, 13, 253
• "Labor Demand Shocks at Birth and Cognitive Achievement during Childhood", with Krishna Regmi, Economics of Education Review, 2019, 73
• "An Introduction to Nonparametric Regression for Labor Economists", with Anne-Charlotte Souto, Journal of Labor Research, 2018, 39, 355-382 [lead article]
• "Kernel-Based Testing with Skewed and Heavy-Tailed Data: Evidence from a Nonparametric Test for Heteroskedasticity", with Alice Sheehan, Economics Letters, 2018, 172, 8-11 ​Supplemental Material
• "On Discrete Epanechnikov Kernel Functions," with Chi-Yang Chu and Christopher F. Parmeter, Computational Statistics and Data Analysis, 2017, 116, 79-105
• "Nonparametric Estimation in Economics: Bayesian and Frequentist Interpretations," with Joshua C. C. Chang, Christopher F. Parmeter and Justin Tobias, Wiley Interdisciplinary Reviews: Computational Statistics, 2017, 9, 1-13 [lead article]
• "The Distribution of Returns to Education for People with Disabilities," with Andrew Houtenville and Le Wang, Journal of Labor Research, 2017, 38, 261-282 [lead article]
• "The Robust Relationship Between US Food Aid and Civil Conflict," with Chi-Yang Chu and Le Wang, Journal of Applied Econometrics, 2017, 32, 1027-1032
• "The Three Is of Public Schools: Insufficient Resources, Irrelevant Inputs and Inefficiency," with Leopold Simar and Le Wang, Applied Economics, 2017, 49, 1164-1184
• "Root-n Consistent Kernel Density Estimation in Practice," with Christopher F. Parmeter, Journal of Econometric Methods, 2017, 6
• “Teaching Nonparametric Econometrics to Undergraduates,” with Christopher F. Parmeter, Journal of Econometric Methods, 2016, 5, 179-193
• "Smooth Coefficient Estimation of a Seemingly Unrelated Regression," with Subal C. Kumbhakar, Qi Li and Christopher F. Parmeter, Journal of Econometrics, 2015, 189, 148-162
• "A Consistent Bootstrap Procedure for Nonparametric Symmetry Tests," with Christopher F. Parmeter, Economics Letters, 2015, 131, 78-82 Additional Size Plots
• "Plug-in Bandwidth Selection for Kernel Density Estimation with Discrete Data," with Chi-Yang Chu and Christopher F. Parmeter, Econometrics, 2015, 3, 199-214
• "The Inequality-Growth Plateau," with Junhui Qian and Le Wang, Economics Letters, 2015, 128, 17-20
• "Gradient Based Smoothing Parameter Selection for Nonparametric Regression Estimation," with Qi Li, Christopher F. Parmeter and Shuang Yao, Journal of Econometrics, 2015, 184, 233-241
• "Additive Kernel Estimates of Returns to Schooling," with Deniz Ozabaci, Empirical Economics, 2015, 48, 227-251
• "Significant Drivers of Growth in Africa," with Oleg Badunenko and Romain Houssa, Journal of Productivity Analysis, 2014, 42, 339-354
• "Additive Nonparametric Regression in the Presence of Endogenous Regressors," with Deniz Ozabaci and Liangjun Su, Journal of Business and Economic Statistics, 2014, 32, 555-575  Supplemental Material
• "Estimation and Inference Under Economic Restrictions," with Subal C. Kumbhakar, Christopher F. Parmeter and Kai Sun, Journal of Productivity Analysis, 2014, 41, 111-129
• "Does Education Matter for Economic Growth?" with Michael S. Delgado and Christopher F. Parmeter, Oxford Bulletin of Economics and Statistics, 2014, 76, 334-359
• "Who Benefits from Financial Development? New Methods, New Evidence," with Chris Papageorgiou and Christopher F. Parmeter, European Economic Review, 2013, 63, 47-67
• "Polarization of the Worldwide Distribution of Productivity," with Oleg Badunenko and R. Robert Russell, Journal of Productivity Analysis, 2013, 40, 153-171 [lead article] ​Appendices
• "A Simple Method to Visualize Results in Nonlinear Regression Models," with Subal C. Kumbhakar and Christopher F. Parmeter, Economics Letters, 2012, 117, 578-581
• "Normal Reference Bandwidths for the General Order, Multivariate Kernel Density Derivative Estimator," with Christopher F. Parmeter, Statistics and Probability Letters, 2012, 82, 2198-2205
• "Canonical Higher-Order Kernels for Density Derivative Estimation," with Christopher F. Parmeter, Statistics and Probability Letters, 2012, 82, 1383-1387
• "When, Where and How to Perform Efficiency Estimation," with Oleg Badunenko and Subal C. Kumbhakar, Journal of the Royal Statistical Society, Series A, 2012, 175, 863-892 Appendices
• "Growth Empirics without Parameters," with Chris Papageorgiou and Christopher F. Parmeter, Economic Journal, 2012, 122, 125-154 Technical Appendix
• "Empirical Implementation of Nonparametric First-Price Auction Models," with John A. List, Daniel L. Millimet, Christopher F. Parmeter and Michael K. Price, Journal of Econometrics, 2012, 168, 17-28
• "Heterogeneity in Schooling Rates of Return," with Solomon W. Polachek and Le Wang, Economics of Education Review, 2011, 30, 1202-1214
• "Are We Wasting Our Children's Time by Giving Them More Homework?" with Ozkan Eren, Economics of Education Review, 2011, 30, 950-961 
• "Biases in Approximating Log Production," with Subal C. Kumbhakar and Kai Sun, Journal of Applied Econometrics, 2011, 26, 708-714
• "A Test for Multimodality of Regression Derivatives with Application to Nonparametric Growth Regressions," Journal of Applied Econometrics, 2010, 25, 458-480
• "A Nonparametric Examination of Capital-Skill Complementarity," Oxford Bulletin of Economics and Statistics, 2009, 71, 519-538 Appendices
• "Technological Change and Transition: Relative Contributions to Worldwide Growth During the 1990's," with Oleg Badunenko and Valentin Zelenyuk, Oxford Bulletin of Economics and Statistics, 2008, 70, 461-492 Appendices
• "Nonparametric Estimation and Testing of Fixed Effects Panel Data Models," with Raymond J. Carroll and Qi Li, Journal of Econometrics, 2008, 144, 257-275
• "The Impact of Homework on Student Achievement," with Ozkan Eren, Econometrics Journal, 2008, 11, 326-348
• "Modes, Weighted Modes, and Calibrated Modes: Evidence of Clustering Using Modality Tests," with Christopher F. Parmeter and R. Robert Russell, Journal of Applied Econometrics, 2008, 23, 607-638 
• "Is Gravity Linear?" with Daniel L. Millimet, Journal of Applied Econometrics, 2008, 23, 137-172 [lead article] Appendix A  | Appendix B | Appendix C
• "A Drive up the Capital Coast? Contributions to Post-Reform Growth Across Chinese Provinces," with Oleg Badunenko and Kiril Tochkov, Journal of Macroeconomics, 2007, 29, 569-594
• "Testing for (Efficiency) Catching-up," with Valentin Zelenyuk, Southern Economic Journal, 2007, 73, 1003-1019 Appendix A  | Appendix B
• "Pollution Abatement Costs and Foreign Direct Investment Inflows to U.S. States: A Nonparametric Reassessment," with Daniel L. Millimet, Review of Economics and Statistics, 2007, 89, 178-183 Additional Results
• "Nonparametric Estimation of a Hedonic Price Function," with Subal C. Kumbhakar and Christopher F. Parmeter, Journal of Applied Econometrics, 2007, 22, 695-699
• "Do Former College Athletes Earn More at Work? A Nonparametric Assessment," with Alexandre Olbrecht and Solomon Polachek, Journal of Human Resources, 2006, 41, 558-577 
• "Public and Private Capital Productivity Puzzle: A Nonparametric Approach," with Subal C. Kumbhakar, Southern Economic Journal, 2006, 73, 219-232
• "A Nonparametric Random Effects Estimator," with Aman Ullah, Economics Letters, 2005, 88, 403-407
• "Environmental Regulation and U.S. State-Level Production," with Daniel L. Millimet, Economics Letters, 2005, 87, 47-53 
• "Human Capital and Convergence: A Production Frontier Approach," with R. Robert Russell, International Economic Review, 2005, 46, 1167-1205 ​Results Using Bils and Klenow's (2000) Human Capital Index (Zip File)

Book Chapters

• “Nonparametric Models with Fixed Effects,” with Alexandra Soberon, in The Econometrics of Multi-Dimensional Panels – Theory and Applications, Laszlo Matyas (Ed.), 2024, 2, 285-323​
• "A Semiparametric Constant Elasticity of Substitution Stochastic Frontier Model for Panel Data," with Taining Wang, in Advances in Econometrics, Christopher F. Parmeter, Mike G. Tsionas, Hung-Jen Wang and Daniel L. Millimet (Eds.), 2024, 46, 329-370
• "The Productivity of Nations," with Oleg Badunenko and Valentin Zelenyuk, in Oxford Handbook of Productivity Analysis, Emili Grifell-Tatjé, C. A. Knox Lovell and Robin C. Sickles (Eds.), 2018 
• "Model Averaging over Nonparametric Estimators," with Christopher F. Parmeter, Advances in Econometrics, Gloria Gonzalez-Rivera, R. Carter Hill and Tae-Hwy Lee (Eds.), 2016, 36, 539-560
• "Nonparametric Estimation in a One-Way Error Component Model: A Monte Carlo Analysis," with Aman Ullah, in ISI Statistical Jubilee -- Statistical Paradigms: Recent Advances and Reconciliations, Ashis SenGupta, Tapas Samanta and Ayanendranath Basu (Eds.), 2015, 14, 213-238
• "Searching for Rehabilitation in Nonparametric Regression Models with Exogenous Treatment Assignment," with Esfandiar Maasoumi, Oxford Handbook of Applied Nonparametric and Semiparametric Econometrics and Statistics, Jeffrey S. Racine, Liangjun Su and Aman Ullah (Eds.), 2014, 501-520
• "Fixed versus Random: The Hausman Test Four Decades Later," with Shahram Amini, Michael S. Delgado and Christopher F. Parmeter, Advances in Econometrics, Badi H. Baltagi, R. Carter Hill, Whitney K. Newey and Halbert L. White (Eds.), 2012, 29, 479-513
• "Imposing Economic Constraints in Nonparametric Regression: Survey, Implementation and Extension," with Christopher F. Parmeter, Advances in Econometrics, Qi Li and Jeffrey S. Racine (Eds.), 2009, 25, 433-469
• "Fertility and the Health of Children: A Nonparametric Investigation," with Daniel L. Millimet, Christopher F. Parmeter and Le Wang, Advances in Econometrics, Daniel L. Millimet, Jeffrey A. Smith and Edward Vytlacil (Eds.), 2008, 21, 167-195
• "Nonparametric Estimation of Higher-Order Moments of Technical Efficiency," in Aggregation, Efficiency, and Measurement, Rolf Färe, Shawna Grosskopf and Daniel Primont (Eds.), 2007, 117-128
• "The Nonparametric Measurement of Technical Efficiency Using Panel Data," Dissertation, University of California, Riverside, June 2003

Working Papers

• "Estimation and Inference for Varying Coefficient Multidimensional Panel Data Models," with Christopher F. Parmeter and Alexandra Soberon