FIRM CHARACTERISTICS, CAPITAL RETURNS AND PROFITABILITY: AN ECONOMETRIC CROSS-SECTIONAL ANALYSIS OF UK ENTERPRISES

Author: Dr. Ioannis Aznaouridis

ABSTRACT

Cross-sectional determinants of profitability are examined for a firm-level sample of UK enterprises (N = 1,260), using profit margin (%) as the dependent variable. Motivated by pronounced heterogeneity in accounting profitability, the analysis assesses whether margins vary systematically with firm size (employees; SME status), export orientation, labour-cost intensity (salaries as a % of turnover), operating scale (cost of production), credit capacity (credit limit), and capital-efficiency measures (ROSF, ROCE).

Profit margins average 6.11% and display non-trivial dispersion. SMEs report higher mean margins than large firms, although the magnitude is modest. Profit margins correlate positively with ROCE and ROSF, while ROCE and ROSF are strongly correlated with each other, motivating separate regression specifications.

In simple regressions, both return measures strongly predict profit margin (R² ≈ .27 for ROSF; R² ≈ .33 for ROCE). In multivariate models, credit capacity and SME status remain positively associated with profit margin, whereas export status and cost of production are not statistically significant. Model fit is stronger in the ROCE specification (adjusted R² ≈ .346) than in the ROSF specification (adjusted R² ≈ .283). Overall, cross-firm profitability differences in the UK are most consistently linked to capital efficiency and financing capacity, with limited evidence that export orientation independently explains profit-margin variation once firm characteristics are controlled for.

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