This chapter explores the links between profitability, investment, and structural change. This is examined for the case of India, using both a historical overview and regression analysis. In a Kaldorian dynamic economy, the reallocation of investment provides the driver for resource reallocation, allowing more productive and profitable activities to expand and less productive and less profitable activities to contract. Thus, investment choices drive structural change, productivity growth, technological advance, and ultimately profits. Investment in turn responds to expected profits, which are driven by technical change, related productivity gains, and shifts in demand. The relationships are thus circular and cumulative, with this chapter testing for the presence of such relationships.