# Questions tagged [aggregate-demand]

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### Walrasian equilibrium

Explain why z(p)=0 is a general equilibrium
7 views

### two real gdp at the same price level in ad as model

in a macro book of arnold i see an agg demand-supply model where it seems above the equilibrium price level there are two real gdp for the same price level. the book then goes on to explain that there ...
9 views

### does the income-output-expenditure method of getting real gdp hold in ad as model

in the ad as model, it seems there's two different real gdp for a given price level when in disequilibrium. does this mean the real gdp counted from the demand side is not equal to the real gdp ...
7 views

### difference between quantity of real gdp demanded and quantity of real gdp supplied and real gdp

I can't seem to understand why the agg demand curve and agg supply curve both have real gdp at the horizontal axis and price level at the vertical axis. How can the relation between two same ...
20 views

### What would be the theoretical outcome of expansionary fiscal policy... on the business cycle?

Hello all, So, I came across this question on my economics final. It immediately struck me as odd. It's asking what effect expansionary fiscal policy would have in the Aggregate Demand - Aggregate ...
52 views

### Non Continuous Walrasian Demand Function

I have a silly question. I’m trying to solve some exercises that have to do with the walrasian demand function $x(p,w)$ and excess demand function $z$. More especifically, I’m asked to show that there ...
24 views

### Why does a positive output gap shift the short run AS curve instead the demand curve?

I'm reading through Mishkin "The Economics of Money, Banking, and Financial Markets". In chapter 23 (of the global 13th edition), they introduce the AS/AD framework. What confuses me is the ...
15 views

### CES price index with heterogeneous productivity

When there is a distribution of productivity, so that different firms have different sale shares, the aggregate CES price index has shares as weights? References to papers are welcomed.
24 views

### The proofs in W.M.Gorman "Community preference fields''

I am reading W.M.Gorman "Community preference fields''. However, many of the proofs are omitted or only in outlines. Do you know some other helpful references? Thank you.
1 vote
35 views

### Help with Macroeconomics Question: IS-LM Model [closed]

I know this is supposed to be a simple question, but I need to check the answers for it and as it was a past exam question I do not have the results for it.If anyone can help out, that would be ...
308 views

### Why is the horizontal axis 'Real GDP' in Aggregate Demand Curve

In the aggregate demand curve, the horizontal axis is labelled 'Real GDP'. Why doesn't it represent 'Quantity Demanded'? After all the curve is the aggregate demand curve, so we have to show some ...
743 views

### Does the Sonnenschein-Mantel-Debreu theorem fundamentally undermine Mises' Economic Calculation Argument?

So recently I have been thinking a lot about this fundamental question: Does the Sonnenschein-Mantel-Debreu theorem disprove the "Law of Demand"? Basically, the Sonnenschein-Mantel-Debreu ...
31 views

### How to derive the FIRST equation from the SECOND one?

First equation Dynamic Aggregate Demand How the derive from second equation the first one?
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### Price rigidity and demand-constrained economies

In this note, http://web.mit.edu/krugman/www/MINIMAC.html, Krugman develops a simple model to introduce the idea that whenever an economy experiences price rigidity then this economy is demand-...
133 views

### Aggregate demand and Real GDP

I understand that aggregate demand is the demand for all goods and services in an economy. However, I later found out that aggregate demand and real GDP are calculated using the same formula, so does ...
115 views

### GDP doesn't add up in FED data - why?

To visualise the formula: $$Y=C+I+G+NX$$ I downloaded the FED data and plotted it, only to discover the two curves progressively diverge (see chart below). What am I missing? thank you! $Y$ = https://...
64 views

### Concept of Utility in demand systems

I have seen that researchers use different utility function in demand systems estimation such as Stone Geary. What is the role of these utility functions? What are utility function other than stone ...
1 vote
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### Trouble at differentiating a consumption function

everyone. This is kind of a basic question, but I have a weak background on calculus and I already tried to figure this out by myself for a few hours without success. So, I am finally appealing on you ...
A simple version of the new-Keynesian IS cuve is given as follows: $$\ln Y_{t} =\ln Y_{t+1} -\frac{1}{\theta} r_t.$$ Here $r_t$ is the real interest rate and $1/\theta$ is the cross elasticity of ...
The New Keynesian IS curve can be described by the following (log-linearisation around the steady-state):$$y_t=E_t(y_{t+1})- \frac{1}{\theta}(i_t - E_t\pi_{t+1}-\rho)$$ where \$\displaystyle\frac{1}{\...