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Productivity & Production Analysis

Semi/Nonparametric Econometrics
Spatial and Panel Data Methods

Quantile and Modal Regressions

Financial Services Industry

Climate Economics

Hedonic Valuation


Papers & Work in Progress

Geography of Climate Change Adaptation in U.S. Agriculture”, with J. Zhang, R. Miao & P. Ghosh, 2023

Estimating Production Functions using Costs when Outputs are Restricted,” with S. Zhao, S.C. Kumbhakar & D.H. Bernstein, 2023

Distributional Effects of the Increasing Heat Incidence on Labor Productivity,” with J. Zhang & R. Miao, 2024 

“On the Estimation of Nonneutral Production Technologies without Separability,” with S. Zhao & S.C. Kumbhakar, 2024

“Most Likely Effects of Climate Change,” with J. Zhang & R. Miao

“IT Resources and Barriers in Achieving EHR Interoperability,” with H.-f. Hu, A. Krishen & R. Raschke



A System Approach to Structural Identification of Production Functions with Multiple-Dimensional Productivity” with S. Zhao and J. Zhang, Advances in Econometrics, 2024, 46: 211-263 [working paper]

"On the Estimation of Cross-Firm Productivity Spillovers with an Application to FDI" [Supplementary Appendix], with S. Zhao, Review of Economics & Statistics, 2023, 105(5): 1207-1223 [previously circulated under the title "Cross-Firm Productivity Spillovers in the Presence of Foreign Investments", working paper]

Off-Balance Sheet Activities and Scope Economies in U.S. Banking”, with J. Zhang, Journal of Banking & Finance, 2022, 141, 106534 [working paper]

Accounting for Cross-Location Technological Heterogeneity in the Measurement of Operations Efficiency and Productivity”, with J. Zhang, S. Zhao and S.C. Kumbhakar, Journal of Operations Management, 2022, 68(2): 153-184 [previously circulated under the title "Locational Heterogeneity in Production", working paper]

"Proxy Variable Estimation of Multi-Product Production Functions" [Supplementary Appendix], with G. Lien, American Journal of Agricultural Economics, 2021, 103(5): 1878-1902 [previously circulated under the title "Structural Estimation of Multi-Product Production Functions and Productivity", working paper]

"Distributional and Temporal Heterogeneity in the Climate Change Effects on U.S. Agriculture", [Supplementary Appendixwith R. Miao and J. Zhang, Journal of Environmental Economics & Management, 2020, 104, 102386 [working paper]

"Estimation of Firm-Level Productivity in the Presence of Exports: Evidence from China's Manufacturing",  [Supplementary Appendixwith S. Zhao and S.C. Kumbhakar, Journal of Applied Econometrics, 2020, 35(4): 457-480 [working paper]

"Endogenous Dynamic Efficiency in the Intertemporal Optimization Models of Firm Behavior", with E.G. Tsionas and S.C. Kumbhakar​, European Journal of Operational Research, 2020, 284(1): 313-324 [working paper]

"(Under)Mining Local Residential Property Values: A Semiparametric Spatial Quantile Autoregression", 

[Supplementary Appendix] with Y. Sun and D. Hite, Journal of Applied Econometrics, 2019, 34(1): 82-109

[previously circulated under the title "The Value-Undermining Effects of Rock Mining on Nearby Residential Property"​, working paper]

"Endogenous Scope Economies in Microfinance Institutions", with V. Hartarska, Journal of Banking & Finance, 2018, 93: 162-182 [working paper]

"Estimation and Inference in Functional-Coefficient Spatial Autoregressive Panel Data Models with Fixed Effects", with Y. Sun, Journal of Econometrics, 2018, 203(2): 359-378 [working paper]

"Heterogeneous Credit Union Production Technologies with Endogenous Switching and Correlated Effects", with D.A. Restrepo-Tobon and S.C. Kumbhakar, Econometric Reviews, 2018, 37(10): 1095-1119 [previously circulated under the title "Are All U.S. Credit Unions Alike? A Generalized Model of Heterogeneous Technologies with Endogenous Switching and Correlated Effects"​, working paper]

"An Internally Consistent Approach to the Estimation of Market Power and Cost Efficiency with an Application to U.S. Banking", with E.G. Tsionas and S.C. Kumbhakar, European Journal of Operational Research, 2018, 270(2): 747-760 [working paper]

"Semiparametric Estimation and Testing of Smooth Coefficient Spatial Autoregressive Models", [Supplementary Appendix] with Y. Sun, Journal of Econometrics, 2017, 199(1): 12-34 [working paper]

"Economies of Diversification in the U.S. Credit Union Sector", [Supplementary Appendix] with S. Zhao and S.C. Kumbhakar, Journal of Applied Econometrics, 2017, 32(7): 1329-1347 [working paper]​

"A Cost System Approach to the Stochastic Directional Technology Distance Function with Undesirable Outputs: The Case of U.S. Banks in 2001-2010", with S.C. Kumbhakar and E.G. Tsionas, Journal of Applied Econometrics, 2016, 31(7): 1407-1429 [working paper version here]

"Varying Coefficient Panel Data Model in the Presence of Endogenous Selectivity and Fixed Effects", with S.C. Kumbhakar and Y. Sun, Journal of Econometrics, 2016, 190(2): 233–251 [working paper]

"Estimation of Input Distance Functions: A System Approach", with E.G. Tsionas & S.C. Kumbhakar, American Journal of Agricultural Economics, 2015, 97(5): 1478–1493 [working paper]



"Detecting Learning by Exporting and from Exporters”, with J. Zhang, Journal of Productivity Analysis, 2023, 60: 1-19 [working paper]

"Crop Insurance Premium Subsidy and Irrigation Water Withdrawals in the Western United States”, with P. Ghosh and R. Miao, Geneva Papers on Risk and Insurance - Issues and Practice, 2023, 48: 968-992

"Product and Geographic Market Diversification in U.S. Banking[Supplementary Appendix], with J. Zhang and V. Hartarska, Finance Research Letters, 2021, 42, 101881 [working paper]

"Smoothed LSDV Estimation of Functional-Coefficient Panel Data Models with Two-Way Fixed Effects[Supplementary Appendix], with S. Halder, Economics Letters, 2020, 192, 109239 [working papercorrigendum]

"Economies of Diversification in Microfinance: Evidence from Quantile Estimation on Panel Data", with V. Hartarska and R. Mersland, Finance Research Letters, 2020, 34, 101246 [working paper]

"Nonparametric Estimates of the Clean and Dirty Energy Substitutability", with K. Sun and S.C. Kumbhakar, Economics Letters, 2018, 168: 118-122 [working paper]

"A Hedonic Output Index based Approach to Modeling Polluting Technologies'', with R. Bokusheva and S.C. Kumbhakar, Empirical Economics, 2018, 54(1):  287-308 [working paper]

"Dynamic Responses to Oil Price Shocks: Conditional vs. Unconditional (A)symmetry", [Supplementary AppendixEconomics Letters, 2016, 139: 31–35 [working paper version here]

"How People Think about Distributing Aid", with N. Hassoun and N. Lubchenco, Philosophical Psychology, 2016, 29(7): 1029–1044

"Bayesian Approach to Disentangling Technical and Environmental Productivity", with S.C. Kumbhakar and E.G. Tsionas, Econometrics, 2015, 3(2): 443–465 [working paper]

"Estimation of Banking Technology under Credit Uncertainty",  with D.A. Restrepo-Tobon and S.C. Kumbhakar, Empirical Economics, 2015, 49(1): 185–211 [working paper]

"A Generalized Panel Data Switching Regression Model", with S.C. Kumbhakar, Economics Letters, 2014, 124(3): 353–357 [working paper]

"A Second Look at Sticky Wholesale Gasoline Prices", Journal of Economic and Social Measurement, 2011, 36(3): 227–235



Firm Productivity, Heterogeneity and Exports” 2017 mimeo (last revised 2020)

"A Proportional Scale-Invariant Measurement of Heterogeneous Directional Distances to the  Technological Frontier", with E.G. Tsionas and D.A. Restrepo-Tobon, 2017 mimeo

"Are the Job Flow Responses to Oil Price Shocks Asymmetric?" [Appendix

2012 mimeo (last revised 2015)


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