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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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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Solving Euler Equation for standard DSGE Models

I am studying a rather standard DSGE Model with a standard Utility function $U = f(c_t, n_t, M_t)$ subject to a budget constraint. Now, tosolve the intertemporal optimization problem I have, or ...
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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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51 views

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 <...
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not following a step in a paper on rational expectations

Hi: I'm reading a paper by Broze and Szafarz titled "On Econometric Models with Rational Expectations and I don't follow a step in section 3.2 which discusses the method of undetermined coefficients. ...
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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 $z_t$ ...
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Is there a typo in Sims(2002) paper on solving linear expectations model?

Here's the Sims(2002) paper. It's equal to the published version. The author gives the following example: And tries to write it in the matrix notation of (1) in the paper. However, his solution - ...
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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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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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Solving rational expectations model - Sims form

I am trying to solve my first ratex model and make some impulse response functions using Dynare. I am following Leeper (1991). This is what I have done so far: The utility function is $\log(c_{t})+\...
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Saddle path equilibrium on financial market with rational expectations

In his 1978 paper introducing the Tobin tax Tobin states that : As a technical matter, we know that a rational expectations equilibrium on markets of this kind is a saddle point. That is, there ...
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What conditions must we demand for the economy to be always on the saddle path?

Is it enough to assume that agents have perfect foresight, or have 'rational' expectations for the economy to always - except in few cases - be in the stable saddle path? With rational expectations, ...