Selected Publications Manufacturing Environment and Economic Growth in South Africa: Evidence from Fourier Toda Yamamoto causality test, with Andisheh Saliminezhad, forthcoming International Journal of Business Environment. On the relationship between export and economic growth: A nonparametric causality-in-quantiles approach for Turkey, 2019, with Andisheh Saliminezhad, The Journal of International Trade & Economic Development, 1-15. Family decision-making for educational expenditure: new evidence from survey data for Nigeria, 2019, with Glenn P. Jenkins and Hope A. Anyabolu, Applied Economics, 1-11. Forecasting South African inflation using non-linear models: a weighted loss-based evaluation, 2016, with Patrick T. Kanda, Mehmet Balcilar and Rangan Gupta, Applied Economics, 48:26, 2412-2427. Price modelling of natural gas for the EU-12 countries: Evidence from panel cointegration, 2015, with Vedat Yorucu, Journal of Natural Gas Science and Engineering, 24, 464-472.