Recursive macroeconomic theory, Thomas Sargent 2nd Ed - Chapter 10 pps

... constrained. 2 1 We encountered a more general version of equation (10. 2.5) in chapter 8 when we discussed Arrow securities. 2 Note b t = 0 does not imply that the consumer is borrowing constrained. He ... τ t+j − y t+j ). (10. 3.4) The natural debt limit is obtained by setting c t =0 forall t in (10. 3.4), ˜ b t ≥ ∞  j=0 R −j (τ t+j − y t+j ). (10. 3.5) 314 Ricardian Equivalence 10. 4....

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... −w t τ (s τ )n τ (s τ )],asexpressedintermsoftime-t,history-s t con- sumption goods. Thus, the household’s wealth, or the value of all its current and future net claims, expressed in terms of the date-t,history-s t consumption good ... current position. It is all that is needed for a planner to compute an optimal alloca- tion and it is all that is needed for the “invisible hand” to call out p...

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... is allowed in this chapter. A generalization of the single-agent model of this chapter will also be an important component of the incomplete markets models of chapter 17. Finally, the chapter ... a 0 = y 0 . One-period assets carried (a t − c t )overintoperiodt +1 from t must be non- negative, so that the no-borrowing constraint is a t ≥ c t .Attimet =0,after y 0 is realized, the consu...

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... current-period endowment in exchange for a raised promised utility v t+1 >v t . Promised values never decrease. They stay con- stant for low-y states y s < ¯y(v t ), and increase in high-endowment ... needed to increase the ex ante promised expected utility. As for those lucky households who have received relatively high endowment real- izations, the optimal contract prescribes an uncha...

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... that can be regarded as extending the ap- proach that we used in the villager-money lender model of section 19.3 to an environment with two-sided lack of commitment. We followed Kocherlakota in using ... are identical well-defined optimization prob- lems. The observant reader should not be concerned with the fact that Q k (·) ontheleftsideof(20.4.5) might be evaluated at a promised value outsi...

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... optimal search ef- fort under autarky. To compute the numbers in Fig. 21.2.1 we used these same settings. 5 In chapter 4, pages 103 106 , we described a computational strategy of iter- ating to convergence ... expected discounted costs, using β as the discount factor. We formulate the optimal insurance problem recursively. Let C(V ) be the expected discounted costs of giving the worker exp...

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... equilibrium. A two-money model 919 c t+1 c t 1-g 1-g 1 1 c = R(1-c ) 0 1 I A B 1-F' H' D I' E Figure 25.8.2: The minimum denomination F and the return on money can be lowered vis-`a-vis their ... east-heading agent at an even-numbered trading post is endowed with one unit of the consumption good, and an odd-numbered trading post has an endowment of zero units (see Figure 25.5.1...

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... insured away. Higher present-value-of-endowment consumers will have permanently higher consump- tion than lower present-value-of-endowment consumers, so that there is a non- degenerate cross-section ... humans share a com- mon ancestor called Eve who lived 200,000 years ago. All of macroeconomics too seems to have descended from a common source, Irving Fisher’s and Mil- ton Friedman’s consump...

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... Time series 0 10 20 30 −15 10 −5 0 5 impulse response 0 1 2 3 10 2.1772 10 2.1776 10 2.178 10 2.1784 spectrum −15 10 −5 0 5 10 15 0 50 100 150 covariogram 20 40 60 80 −30 −20 10 0 10 20 sample ... difficult to predict variable; and (b) nevertheless that θ(L) = φ(L) so that the stochastic discount factor has subtle predictable components. Fea- ture (a) is needed to match ob...

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... permit uncertainty. Es- sentially, we add some well-placed shocks to the previous non-stochastic prob- lem. So long as the shocks are either independently and identically distributed or Markov, straightforward ... method proceeds by constructing a sequence of value functions and associated policy functions. The sequence is created by iterating on the following equation, starting from V 0 = 0,...

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