# Questions tagged [rational-expectations]

The Rational Expectations Hypothesis postulates that the value a variable is expected to take by an economic agent equals the mathematical expected value of that variable conditional on all information available at the time of expectations formation.

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### Solving Leeper (1991) model

I am attempting to solve a variation of Leeper's (1991) model, which deals with the FTPL. This is what I have done so far: The utility function is $\log(c_t)+\delta\log⁡(M_t/p_t)$. I obtain two ...
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### What is the difference between a perfect foresight equilibrium and a rational expections equilibrium?

What is the difference between a perfect foresight equilibrium and a rational expections equilibrium? Why is it the same in case of a non-stochastic model? Can there be a perfect foresight ...
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### What does it mean if a economic model is internally consistent?

What does it mean if a economic model is internally consistent? What happens if it is not? Is it not closed anymore? Can it still be solved? Does it still have an equilibrium?
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### Definiton of information sets in rational expecations models

I am struggling with the notion of 'information sets' in the context of rational expectation models in economics. I found interesting notes on the web (http://www2.econ.iastate.edu/tesfatsi/reintro....
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### Sen's property $\alpha$ holds when limited attention in choice?

Consider the limited attention choice framework by Matejka and McKay (2015). This framework can give rise to consideration sets, as roughly summarised below. Consideration sets in the limited ...
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### Can you please help me find this topic in Mechanism design/Rational choice theory?

When I was in university, I remember studying some kind of topic in adv microeconomics where someone gives you three options, where one is obviously worse and is put there just to deceive you so that ...
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### Analyzing a Gambling Race Paradox

Suppose a number of players are given $100$ points each, and repeatedly engage in a gamble having positive expected value, with the goals of being the first player to reach $100000$ points. Solving ...
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### Are rational expectations in economics purely forwards looking, or can they have backward looking components?

Are rational expectations (Muth, Lucas, Kyland and Prescott) in economics purely forwards looking, or can they have backward looking components?
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### Are heterogenous expectations models still determinate, closed models?

Cars Hommes proposed many models based on agents having heterogeneous expectations. Agents switch between a fixed set of prediction rules depending on their forecast error history. However, it seems ...
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### Successes and limitations of New Keynesian DSGE models?

What are some good review papers that discuss the successes and limitations of current state of the art (New Keynesian) DSGE models assuming rational expectations? Probably some of these reviews can ...
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### How to deal with potential output in the Sims (2002) framework?

In Sims(2002), the author explains how one solves a linear rational expectations model. $$\Gamma_0S_t=\Gamma_1S_{t-1}+C+\Psi z_t + \Pi \mu_t$$ The only thing exogenously defined in the $z_t$ ...
1 vote
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### Why does a model that is used for policy analysis needs its shocks and parameters to be structural (= invariant) to the shock under consideration?

In their paper, " New Keynesian Models: Not Yet Useful for Policy Analysis" V. V. Chari, Patrick J. Kehoe, and Ellen R. McGrattan argue that one needs a structural model in order to analyse the ...
1 vote
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### Solving a LRE model in King-Watson form using alternative algorithms

I have a linear rational expectation model that is in the King-Watson form: AE_{t}y{t+1} = By_{t} + C_{0}x_{t} + C_{1}x{t+1} (1) with the driving process <...
1 vote
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### Expectational stability: adaptive learning of RE equilibria in dynamic systems

There are two steps in the explanation of the expectational stability concept by Evans and Honkapohja (2001) (see below) that I don't understand. Step 1. What does this formula below mean, ...
1 vote
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### Saddles and Rational Expectations. Language barrier preventing me to solve this exercise

For the system \begin{align} \dot{x} = x + y + 1\\ \dot{y} = 2x - y + 5 \end{align} (i) Find the fixed point. (ii) Transform the system into deviations from the fixed point. What are the ...
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1 vote
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### How should assets be valued when there is some private info & informative prices?

Valuation with noisy data and informative prices Suppose everyone in the market for a particular asset has access to some very noisy information from which they can calculate the value of that asset. ...
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1 vote
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### Guess method for solving rational expectations model?

How does one proceed to solve a rational expectations model by guessing. Could someone illustrate a very simple case, or guide me to a resource on this? I am guessing this is somewhat similar to the ...
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### Does the law of motion remain constant in a rational expectation model? Does it constantly change in a boundedly rational agent framework?

Is the following true? The rational expectations hypothesis also implicitly assumes that the law of motion of the economy does not change, which actually is a self-fulfilling assumption as long as ...
1 vote
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### In a rational expectation framework, do all agents know the true law of motion of the economy?

Expectations are model consistent, on average, in a RE framework, so errors are made, but on average they are zero. thus In a rational expectation framework, do all agents know the true law of ...
1 vote
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### Inertia and rational expectations DSGE models

What types of inertia or other phenomena in the data are hard to model with New Keynesian or other DSGE models assuming rational expectations?
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### Fair value that a risk averse individual would pay to enter a gamble

Introduction Assuming an individual (or corporation) with risk aversion and a von Neumann-Morgenstern utility curve and given a gamble g with E(g) > 0. From what I researched, certainty equivalent is ...
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### REE with asymmetric information and Bayesian Nash equilibrium?

What is the difference between a Rational Expectations Equilibrium (REE) with asymmetric information and Bayesian Nash Equilibrium (BNE)? Since agents in both cases play some game or have a strategic ...
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### Hybrid New Keynesian philips curve model - inflation expectation

I am doing research on the HNKPC model following Gali and Gertler 1999 as per the picture. I do not understand how to get the inflation expectations. Could I get more insight on how to perform this ...
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### The assumptions of Rational Expectations Models

What are the assumptions between rational expectations models and how restricted are there for the following results of economic theory? Where can I find them all gathered in some textbook or in the ...
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