The Solow Growth Model is an exogenous model of economic growth that analyzes changes in the level of output in an economy over time. We will examine how the model works when growth comes through capital accumulation, and how it works when growth is due to innovation.Write consumption per worker as a function of the capital stock in steady-state. The Solow model predicts that this economy should experience steady increases in output per worker and increases in the capital stock. Because of diminishing returns to capital. Diminishing returns mean actual investment eventually cannot keep up with break-even investment. Ans. The change in capital stock in the solow model is given by: a. Δ k = σ f ( k ) − δ k. Answer to: In the Solow model, the ? So the increase in the depreciation rate leads to a decline in the capital stock and in the level of output.