Publications

• Cheng, M.-Y., S. Wang, L. Xia, and X. Zhang (2024), Testing specification of distribution in stochastic frontier analysis, Journal of Econometrics, 239(2), 105280.

• Le, H.C., M. Bhattacharya, R. Smyth, and X. Zhang (2024), Does economic growth cause energy intensity of well-being in the very long run? Semi-parametric evidence for selected OECD countries, Energy Economics, 139, 107889.

• Dogan, E. and X. Zhang (2023), A nonparametric panel data model for examining the contribution of tourism to economic growth, Economic Modelling, 128, 106487

• Meng, Y., J. Gao, X. Zhang, and X. Zhao (2021), A panel data model of length of stay in hospitals for hip replacements, Econometric Reviews, 40(7), 688-707.

• Liddle, B., R. Smyth, and X. Zhang (2020), Time-varying income and price elasticities for energy demand: Evidence from a middle-income panel, Energy Economics, 86, 104681.

• Hailemariam, A., R. Smyth, and X. Zhang (2019), Oil prices and economic policy uncertainty: Evidence from a nonparametric panel data model, Energy Economics, 83, 40-51.

• Awaworyi Churchill, S., J. Inekwe, R. Smyth, and X. Zhang (2019), R&D intensity and carbon emissions in the G7: 1870-2014, Energy Economics, 80, 30-37.

• Feng, G., C. Wang, and X. Zhang (2019), Estimation of inefficiency in stochastic frontier models: A Bayesian kernel approach, Journal of Productivity Analysis, 51(1), 1-19.

• Silvapulle, P., R. Smyth, X. Zhang, and J.-P. Fenech (2017), Nonparametric panel data model for crude oil and stock market prices in net oil importing countries, Energy Economics, 67, 255-267.