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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Using the calculus of variations to solve the social planner’s problem in the Ramsey model. Consider the social planner’s problem that we analyzed in Section 2.4: the planner wants to maximize
 t subject to
Â
(a) What is the current-value Hamiltonian? What variables are the control variable, the state variable, and the cost ate variable?
(b) Find the three conditions that characterize optimal behavior analogous to equations (9.21), (9.22), and (9.23) in Section 9.2.
(c) Show that the first two conditions in part (b), together with the fact that f (k (t)) = r (t), imply the Euler equation (equation [9.20]).
(d) Let μ denote the costate variable. Show that
 and thus that
 (t) is proportional to
 Show that this implies that the transversely condition in part (b) holds if and only if the budget constraint, equation (2.15), holds with equality.
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