Productivity economics is a specialized field within economics dedicated to the study of how inputs are transformed into outputs, focusing on the measurement, determinants, and implications of productivity at micro, meso, and macro levels. It investigates the factors driving efficiency improvements and output per unit of input, including technological progress, human capital accumulation, organizational innovation, and institutional quality. Characterized by rigorous empirical analysis using methods like growth accounting and theoretical modeling of production functions and innovation systems, its significance lies in explaining long-run economic growth, informing policy aimed at enhancing competitiveness and living standards, and understanding the sources of prosperity.