Ugur, Mehmet ORCID: https://orcid.org/0000-0003-3891-3641, Churchill, Sefa Awaworyi and Luong, Hoang M. (2019) What do we know about R&D spillovers and productivity? Meta-analysis evidence on heterogeneity and statistical power. Research Policy, 49 (1):103866. ISSN 0048-7333 (Print), 1873-7625 (Online) (doi:10.1016/j.respol.2019.103866)

Churchill, Sefa Awaworyi, Ugur, Mehmet ORCID: https://orcid.org/0000-0003-3891-3641 and Yew, Siew Ling (2017) Government education expenditures and economic growth: a meta-analysis. B. E. Journal of Macroeconomics. ISSN 2194-6116 (Print), 1935-1690 (Online) (doi:10.1515/bejm-2016-0109)

Ugur, Mehmet ORCID: https://orcid.org/0000-0003-3891-3641, Churchill, Sefa Awaworyi and Solomon, Edna (2017) Technological innovation and employment in derived labour demand models: a hierarchical meta-regression analysis. Journal of Economic Surveys, 32 (1). pp. 50-82. ISSN 0950-0804 (Print), 1467-6419 (Online) (doi:10.1111/joes.12187)

Churchill, Sefa Awaworyi, Ugur, Mehmet ORCID: https://orcid.org/0000-0003-3891-3641 and Yew, Siew Ling (2016) Does government size affect per-capita income growth? A Hierarchical meta-regression analysis. Economic Record, 93 (300). pp. 142-171. ISSN 0013-0249 (Print), 1475-4932 (Online) (doi:10.1111/1475-4932.12307)