THE EFFECTIVENESS OF MARKETING EXPENSES IN DRIVING SALES: EVIDENCE FROM PUBLIC PHARMACEUTICAL COMPANIES IN INDIA

In the competitive and innovation-driven landscape of the Indian pharmaceutical industry, effective marketing strategies are essential for achieving commercial success. This study investigates the relationship between marketing expenditure and sales performance among ten leading Indian pharmaceutical companies over a six-year period (2019–2024). Using a combination of descriptive statistics, correlation analysis, and linear regression models, the research aims to determine whether increased marketing investment translates into improved sales outcomes. The findings reveal that while marketing expenditure generally exhibits a statistically significant positive relationship with sales, the strength of this relationship varies across firms. Regression analysis indicates high explanatory power in company-level models (R² values ranging from 0.915 to 0.984), yet a pooled analysis shows a weaker overall association, suggesting marketing is not the sole driver of revenue. Correlation coefficients also differ markedly—ranging from strong positive to weak negative highlighting that the effectiveness of marketing efforts is highly context-dependent. The study concludes that marketing investments can positively impact sales performance, but their effectiveness depends on strategic alignment, execution quality, and firm-specific factors. These insights underscore the need for pharmaceutical companies to evaluate and tailor their marketing strategies for optimized performance. The paper also outlines directions for future research, including multi-variable and time-series approaches, to deepen understanding of the dynamics influencing pharmaceutical sales. Keywords: Pharmaceutical Industry, Marketing Expenditure, Sales Performance, Regression Analysis, Correlation, Indian Pharma Sector, Marketing Effectiveness, Financial Performance