The overall change in the capital stock is equal to new investment minus depreciation: change in capital stock = new investment − depreciation rate × capital stock.
On the graph, the golden rule capital stock is the k that maximizes the distance between the production function and total depreciation. Why? The difference between the two lines is consumption; the golden rule capital stock is the k that maximizes consumption.
The Solow growth model focuses on long-run economic growth. A key component of economic growth is saving and investment. An increase in saving and investment raises the capital stock and thus raises the full-employment national income and product.
In economics, the Golden Rule savings rate is the rate of savings which maximizes steady state level of the growth of consumption, as for example in the Solow–Swan model.
The neoclassical growth model propounded by Ramsey (1928) and further developed by Solow (1956) posits that economic growth results from capital accumulation through household savings. Such accumulation continues until the stage of unconditional convergence as diminishing marginal returns to capital set in.
The Golden Rule level of capital, the steady state value of k that maximizes consumption. = f(k) − δk In the steady state: i = δk because Δk = 0.
Steady state represents the equilibrium of the economy in the long term. Equilibrium occurs exactly when the investment equals the break-even investment. As a result, capital stock does not change.
To be more specific, the steady state level of capital solves the following equation: k = k(1 − δ) + sAf(k). At the steady state, the amount of capital lost by depreciation is exactly offset by saving.
Capital per worker refers to the measure of how much capital exists in the economy and how good that capital is. Moreover, improvement in the quality of capital per worker leads to economic growth since employees will make more services and goods with better capital.
First, determine the total capital (C) in dollars. Next, determine the total labor (L) in hours. Finally, calculate the capital labor ratio using the formula R = C / L.