Global Journal of Economic and Finance Research

Labour cost management remains a critical yet poorly disaggregated dimension of corporate financial strategy in Nigeria's manufacturing sector. While personnel expenditures constitute a substantial portion of operating costs, prevailing research treats labour costs as a single aggregate, masking the distinct performance implications of base salaries, statutory pension remittances and training investments. This investigation addresses the gap through retrospective analysis of panel data drawn from ten manufacturing firms listed on the Nigerian Exchange Group over ten years (2015–2024). Random Effects regression models selected via Hausman specification tests assess relationships between disaggregated labour cost ratios and dual performance metrics: operating profit margin and earnings per share. Findings reveal asymmetric effects. Salary intensity demonstrates robust negative associations with both operating profit margin (β = –0.450, p < 0.001) and earnings per share (β = –1.580, p < 0.001), signaling margin erosion when compensation growth outpaces productivity. Statutory pension contributions correlate positively with operating profit margin (β = 0.165, p = 0.006) and earnings per share (β = 0.935, p < 0.001), suggesting compliance functions as a strategic lever for workforce stability rather than a mere regulatory burden. Training expenditures show a negligible contemporaneous impact on operational efficiency (β = –0.033, p = 0.803) yet significantly enhance earnings per share (β = 1.410, p = 0.001), positioning capability development as a medium-term value driver. The evidence underscores that performance outcomes hinge not on aggregate labour spending but on its strategic composition. Firms optimizing compensation-productivity alignment, honouring pension obligations consistently and sustaining training investments with multi-year return horizons position themselves for superior profitability and shareholder returns within Nigeria's margin-constrained manufacturing environment.

Labour cost, operating profit margin, earnings per share, salary cost, pension compliance, training investment, NGX-listed firms, Nigeria

1. Adeniji, A. A., & Olaoye, F. O. (2020). Wage and salary cost impact analysis: Evidence from the financial performance of Nigerian quoted manufacturing firms. International Journal of Economics, Commerce and Management, 8(4), 432–445.
2. Akpa, V. O., Mowaiye, B., Akinlabi, B. H., & Magaji, N. (2022). Effect of green human resource management practices and green work-life balance on employee retention in selected hospitality firms in Lagos and Ogun States, Nigeria. European Journal of Human Resource Management Studies, 5(4), 129–142.
3. Akpanabia, N. H. & Ozims, E. (2021). Cost Control and Productivity of Manufacturing Organizations in Abia State. International Journal of Economics, Finance and Sustainable Development, 18 - 29
4. Amahalu, N. N., Okudo, C. L., Okafor, O. O., & Onyeka, C. M. (2023). Effect of human resource cost on the profitability of quoted industrial goods firms in Nigeria. International Journal of Research in Commerce and Management Studies (IJRCMS), 5(3), 60–76.
5. Amit, R., & Schoemaker, P. J. H. (1993). Strategic assets and organizational rent. Strategic Management Journal, 14(1), 33–46. 
6. Anwar, G., & Abdullah, N. N. (2021). The impact of human resource management practice on organizational performance. International Journal of Engineering, Business and Management, 5(1), 35–47.
7. Bankole, T. O. (2020). Human resource costs’ influence on the financial performance of a Nigerian consumer goods company. American International Journal of Business Management, 3(3), 31–41.
8. Barney, J. (1991). Firm resources and sustained competitive advantage. Journal of Management, 17(1), 99–120.
9. Baron, A., & Armstrong, M. (2010). Human capital management: Achieving added value through people (2nd ed.). Kogan Page.
10. Becker, B., & Huselid, M. A. (1998). High performance work systems and firm performance: A synthesis of research and managerial implications. Research in Personnel and Human Resources Management, 16, 53–101.
11. Becker, G. S. (1964). Human capital: A theoretical and empirical analysis, with special reference to education. Columbia University Press.
12. Becker, G. S. (1993). Human capital: A theoretical and empirical analysis with special reference to education (3rd ed.). University of Chicago Press.
13. Becker, G. S. (2002). Investment in human capital: A theoretical analysis (3rd ed.). University of Chicago Press.
14. Coff, R. W. (1997). Human assets and management dilemmas: Coping with hazards on the road to resource-based theory. Academy of Management Review, 22(2), 374–402. 
15. Cooke, F. L., Xiao, Q., & Xiao, M. (2020). Extending the frontier of research on (strategic) human resource management in China: A review of David Lepak and colleagues’ influence and future research direction. The International Journal of Human Resource Management, 32(1), 183-224.
16. Efeeloo, J., Ajoku, O., Chikwuchehia, E., & Turakpe, A. (2020). Staff costs and profitability of quoted oil and gas companies in Nigeria. International Journal of Research in Commerce and Management Studies, 5(2), 45–60.
17. Fadare, T. & Adegbie, F. F. (2020). Cost Management and Financial Performance of Consumer Goods Companies Quoted in Nigeria. International Journal of Scientific and Research Publications, 10(8), 32-41.
18. Godwin, E. O., Amos, O. T. & Sunday, A. O. (2019). Cost Control and Profitability of Selected Manufacturing Companies in Nigeria. Journal of Accounting and Strategic Finance, 2(1), 14-3
19. Govand, A., & Abdullah, N. N. (2021). The impact of human resource management practice on organizational performance. International Journal of Engineering, Business and Management, 5(1), 35–44.
20. Hasan-Subhi, H. H. (2019). Intellectual capital and financial performance: Empirical evidence from the Iraq stock exchange (ISE). Academy of Accounting and Financial Studies Journal, 23(1), 1-11.
21. Lombardi, R., Manfredi, S., Cuozzo, B., & Palmaccio, M. (2020). The profitable relationship between corporate social responsibility and human resource management: A new sustainable key factor. Corporate Social Responsibility and Environmental Management, 27(6), 2657-2667.
22. Maziriri, E.T. (2020). Green packaging and green advertising as precursors of competitive advantage and business performance among manufacturing small and medium enterprises in South Africa. Cogent Business and Management, 7, 1 – 21.
23. Mincer, J. (2006). Education and unemployment. National Bureau of Economic Research.
24. Mohammad, N., Chandran, V. G., Kweh, Q. L., & Wen-Min, L. (2019). Measuring human, physical and structural capital efficiency performance of Insurance companies. Social Indicators Research, 137(1), 281-315.
25. Mousa, S. K., & Othman, M. (2020). The impact of green human resource management practices on sustainable performance in healthcare organisations: A conceptual framework. Journal of Cleaner Production, 243, 118595.
26. Naidoo, K., & Yu, Y. (2020). Unit labour costs and manufacturing sector performance in sub-Saharan Africa. Journal of African Business, 21(4), 567–585.
27. National Pension Commission (PenCom). (2023). Annual Report and Statement of Accounts 2022. Abuja: PenCom.
28. Ndum, N.B., & Oranefo, P. (2021). Human resource cost and financial performance: A study of quoted brewery firms in Nigeria. International Journal of Innovative Finance and Economics Research 9(2), 73-84.
29. Newbert, S. L. (2007). Empirical research on the resource-based view of the firm: An assessment and suggestions for future research. Strategic Management Journal, 28(2), 121–146. 
30. Nwankwo, A. A. (2022). Green business strategies and performance of brewing firms in South-East Nigeria. International Journal of Innovative Social Sciences & Humanities Research, 10(1), 127–138.
31. Nwokeabia, I. A., Uguru, L. C., & Chukwu, U. C. (2023). Effect of cost control on corporate performance: Evidence from selected listed brewery firms in Nigeria. Journal of Accounting and Financial Management, 9(5), 77–93.
32. Obulor, O., & Ohaka, J. (2020). Training cost and financial performance nexus: Sector analysis of quoted manufacturing firms in Nigeria. Research Journal of Finance and Accounting, 10(18): 83-92.
33. Okafor, U. I., Ikem, O. C., & Nduka, O. R. (2022). Expenditure in human resources and financial performance of quoted manufacturing companies in Nigeria. East African Scholars Journal of Economics, Business and Management, 5(2), 48–60.
34. Okudo, C.C., Amahalu, N.N., & Oshiole, S. (2023). Complementarity of equity and debt capital on the profitability of quoted consumer goods firms in Nigeria. International Journal of Trend in Scientific Research and Development (IJTSRD), 7(2), 491-501.
35. Olayeni, A., Ogbo, A., Okwo, H., Chukwu, B., Ifediora, C., & Ezenwakwelu, C. (2021). Green strategy effect on financial and environmental performance: A mediation analysis of product quality. Sustainability, 13, 1 – 17.
36. Oluwayemisi, A. B., Elkanah. E., Ademola. O., Mathew, O. O. & Mamidu, A. I. (2022). Cost Control and Financial Performance: An Empirical Investigation of Selected Quoted Manufacturing Firms in Nigeria. Journal of Accounting and Management, 12(2), 165 – 176.
37. Omah, P. C. & Horsfall, K. A. (2021). Cost Control Practices and Corporate Performance of Manufacturing Companies in Rivers State. International Journal of Innovations in Marketing and Accounting Research, 9(1), 108 – 114.
38. Penrose, E. T. (1959). The theory of the growth of the firm. Oxford University Press.
39. Priem, R. L., & Butler, J. E. (2001). Is the resource-based "view" a useful perspective for strategic management research? Academy of Management Review, 26(1), 22–40. 
40. Riyadh, H. A., Al-Shmam, M. A., Huang, H., Gunawan, B., & Alfaiza, S. A. (2020). The analysis of the green accounting cost impact on a corporation's financial performance. International Journal of Energy Economics and Policy, 10(6), 421–426.
41. Schultz, T. W. (1961). Investment in human capital. American Economic Review, 51(1), 1–17.
42. Solomon Kiran, V., Shanmugam, V., Raju, R. K., & Kanagasabapathy, J. R. (2022). Impact of human capital management on organizational performance with the mediation effect of human resource analytics. International Journal of Professional Business Review, 7(3), 1–27.
43. Tortia, E. C., Gago, M., Degavre, F., & Poledrini, S. (2022). Worker Involvement and Performance in Italian Social Enterprises: The Role of Motivations, Gender and Workload. Sustainability (Switzerland), 14(2), 1–20.
44. Uguru, L. C. & Ituma, C. E. (2022). Firm Structural Characteristics and Corporate Performance of Brewery Firms: Evidence from Nigeria. International Journal of Research and Scientific Innovation (IJRSI), 9(6), 17 – 28
45. Wernerfelt, B. (1984). A resource-based view of the firm. Strategic Management Journal, 5(2), 171–180.
46. Xiao, M., Cooke, F. L., Xu, J., & Bian, H. (2020). To what extent is corporate social responsibility part of human resource management in the Chinese context? A review of literature and future research directions. Human Resource Management Review, 30(4), 100726.
47. Yushang, K., Chipwere, W. & Adu-Gyamfi, J. (2020). The Impact of Cost Control Strategies on Companies’ Performance and Growth: Evidence from Some Selected Companies in Zimbabwe. International Journal of Management Sciences and Business Research, 9(1), 28-33
48. Yusoff, Y. M., Nejati, M., Kee, D. M. H., & Amran, A. (2020). Linking green human resource management practices to environmental performance in the hotel industry. Global Business Review, 21(3), 663-680.