Suppose you are a policy analyst at the World Bank tasked with advising policymakers in a...
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Suppose you are a policy analyst at the World Bank tasked with advising policymakers in a developing country about how to achieve higher consumption levels in their economy. You use your knowledge of economic growth theory to calculate the savings rate that maximizes steady-state per capita consumption in the Solow growth model. Consider the standard Solow growth model. The production function is given, in each year t, by: F(Kt. L) = Y = AKIB Where the number of workers in the labor force is constant at L, and TFP (productivity) is also constant at A. B, the share of labor in production, is greater than 0 and less than 1. Capital accumulation is described by: Kt+1= Kt + It - dkt Where Kt+1 is the stock of aggregate capital in year t + 1, K, is the stock of capital in year t, d is the rate of capital depreciation, and I, is the flow of new investments in the economy in year t. The economy is closed and there is no public spending. The resource constraint of the economy is Ct + t = Yt Where Ct is aggregate consumption in year t. Finally, the economy saves a constant share of output in every year, so that the saving rate is 5. Given the constant saving rate and the economy's resource constraint, in every year total investment is equal to total savings, according to the equation: It = SY₂ Answer the following questions: 1. Derive the steady state level of capital per capita, k". We now want to derive the level of capital per capita and savings rate that maximize consumption per capita in steady state, c. 2. Derive an expression for the steady-state level of consumption per capita c in the Solow model as a function of the parameters of the model. How does the savings rate affect c*? What is the intuition? 3. Find the savings rate and the steady-state level of capital per capita (known as kgold) that maximize the steady-state level of consumption per capita. (Hint: set up and solve the consumption maximization problem with respect to savings rate). 5. 2 Is the golden level of capital per capita different from the one derived in point 1? If so, why? Before presenting your theoretical results to the policymakers, you evaluate them quantitatively using common parameter values from the Solow model. Consider the following parameters: A = L = 1, B = 0.65, 5= 0.4, d = 0.1. Compute the steady state level of capital per capita (point 1) and the golden level of capital per capita (point 3). Which one is higher? Which case gives the highest consumption per capita level? Suppose the government wants to increase consumption per capita in steady state and trusts your analysis. Should they increase or decrease the savings rate? Explain. Suppose that the government changes the savings rate in accordance with your analysis. Using the convergence equation derived in class, compute and plot the path of capital per capita and consumption per capita towards the new steady state for the first 5 periods after the change in 5. Is consumption per capita increasing or decreasing today? Is the government facing any intertemporal trade-off? Suppose you are a policy analyst at the World Bank tasked with advising policymakers in a developing country about how to achieve higher consumption levels in their economy. You use your knowledge of economic growth theory to calculate the savings rate that maximizes steady-state per capita consumption in the Solow growth model. Consider the standard Solow growth model. The production function is given, in each year t, by: F(Kt. L) = Y = AKIB Where the number of workers in the labor force is constant at L, and TFP (productivity) is also constant at A. B, the share of labor in production, is greater than 0 and less than 1. Capital accumulation is described by: Kt+1= Kt + It - dkt Where Kt+1 is the stock of aggregate capital in year t + 1, K, is the stock of capital in year t, d is the rate of capital depreciation, and I, is the flow of new investments in the economy in year t. The economy is closed and there is no public spending. The resource constraint of the economy is Ct + t = Yt Where Ct is aggregate consumption in year t. Finally, the economy saves a constant share of output in every year, so that the saving rate is 5. Given the constant saving rate and the economy's resource constraint, in every year total investment is equal to total savings, according to the equation: It = SY₂ Answer the following questions: 1. Derive the steady state level of capital per capita, k". We now want to derive the level of capital per capita and savings rate that maximize consumption per capita in steady state, c. 2. Derive an expression for the steady-state level of consumption per capita c in the Solow model as a function of the parameters of the model. How does the savings rate affect c*? What is the intuition? 3. Find the savings rate and the steady-state level of capital per capita (known as kgold) that maximize the steady-state level of consumption per capita. (Hint: set up and solve the consumption maximization problem with respect to savings rate). 5. 2 Is the golden level of capital per capita different from the one derived in point 1? If so, why? Before presenting your theoretical results to the policymakers, you evaluate them quantitatively using common parameter values from the Solow model. Consider the following parameters: A = L = 1, B = 0.65, 5= 0.4, d = 0.1. Compute the steady state level of capital per capita (point 1) and the golden level of capital per capita (point 3). Which one is higher? Which case gives the highest consumption per capita level? Suppose the government wants to increase consumption per capita in steady state and trusts your analysis. Should they increase or decrease the savings rate? Explain. Suppose that the government changes the savings rate in accordance with your analysis. Using the convergence equation derived in class, compute and plot the path of capital per capita and consumption per capita towards the new steady state for the first 5 periods after the change in 5. Is consumption per capita increasing or decreasing today? Is the government facing any intertemporal trade-off?
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Systems Analysis and Design
ISBN: 978-1133274636
9th Edition
Authors: Shelly Cashman, Gary B. Shelly and Harry J. Rosenblatt
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