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13
votes
1answer
303 views

Barro's (2009) rare disaster model in the AER: How to derive equation (10)?

In Barro (2009) Rare disasters, asset prices and welfare costs Barro develops a Lucas tree model with Epstein-Zin preferences. My question concerns the paper's equation (10). In this equation Barro ...
13
votes
1answer
420 views

Stochastic growth in continuous time

Literature: See Chang (1988) for theoretical part and Achdou et al. (2015) for numerical part respectively. Model Consider the following stochastic optimal growth problem in per capita notation. \...
13
votes
1answer
1k views

Solving the Hamilton-Jacobi-Bellman equation; necessary and sufficient for optimality?

Consider the following differential equation \begin{align} \dot x(t)=f(x(t),u(t)) \end{align} where $x$ is the state and $u$ the control variable. The solution is given by \begin{align} x(t)=x_0 + \...
13
votes
0answers
270 views

How accurate is duality?

In economic theory we know that with the use of some calculus, Hotellings Lemma and Sheppards lemma we can derive a given firms supply function and in term its Profit function. With data of a given ...
12
votes
7answers
2k views

Textbook for macroeconomics (advanced undergrad)

I find that many contemporary macroeconomics textbooks are too applied, filled with examples, case studies and intuitive illustrations, often at the expense of quantitative rigour and therefore the ...
12
votes
5answers
286 views

Contest: earliest written instance of economic thought

Following part 5 of @Lateral fractal answer to "Handy Hints for Committing to the Beta" on the meta "Have fun! No fun = No play. No play = No beta. I'm sure I'm not the only one to feel that a ...
12
votes
6answers
4k views

Why must the rate of GDP growth be positive?

There are always expectations that GDP should be growing at a certain rate. This is what I see in the newspapers. I am not an economics major and this is a very basic student question. After adjusting ...
12
votes
5answers
2k views

The supply and demand of Virtual Products

We know that the fundamental economic problem is scarce resources relative to unlimited wants. **Does this apply to apps and Ebooks?**They are essentially virtual products who have in theory have ...
12
votes
4answers
8k views

Is complex analysis used in economics?

It's frequently useful in physics and engineering applications; are there any applications in theoretical economics? (If not, were there any attempts at incorporating CA that just never caught on?) ...
12
votes
4answers
729 views

R in econ departments?

According to my personal observation the majority of (prominent) economists prefer use Stata for their statistical analysis and Matlab for other mathematical work. SAS and Excel are also used (...
12
votes
4answers
5k views

Does the US stock market tend to rise after natural disasters?

It seems counter intuitive that markets would rise after a huge disaster that probably affects multiple industries like oil or produce. For example, can someone explain why the US markets actually ...
12
votes
5answers
857 views

What are is the reasoning behind the sharp fall of oil prices starting in mid 2014?

Things I have considered: Poor economic conditions around the world could have caused an unpredicted decrease in demand. The resulting surplus has begun driving prices down. This could be ...
12
votes
4answers
6k views

Why do lenders dislike early loan repayments?

I've frequently seen references in blogs and articles about how banks and other lending agencies like to refer to people who repay loans on an accelerated schedule as "deadbeats", because they get ...
12
votes
4answers
646 views

What are the empirical techniques to show causation?

A simple linear regression only shows correlation between two variables. To establish causation, two commonly taught methods are IV regression and natural experiments. What are the other methods ...
12
votes
4answers
809 views

Osborne, Nash equilibria and the correctness of beliefs

In Osborne's An Introduction to Game Theory Nash equilibrium is described as follows (p. 21–22): First, each player chooses her action according to the model of rational choice, given her beliefs ...
12
votes
3answers
812 views

Consumer optimum in an economy with a continuum of commodities

Consider an economy with a continuum of commodities, with one commodity for each point in $[0,1]$. Suppose a consumer wants to maximise $$U = \int_0^1 c_i^\theta\,di\qquad 0<\theta<1$$ subject ...
12
votes
2answers
2k views

Why in most macro models technology is labor-augmenting?

Take Romer's advanced macro book as reference. In it the Solow model,the Ramsey model and the Diamond OLG all contain the fundamental $A_t$ variable representing technological progress. In all these ...
12
votes
2answers
2k views

Monopolies are just a mathematical misunderstanding

A little head-scratcher (and a good example why we should be careful with notation). Consider a profit maximizing monopoly, that solves over price $$\max \pi = PQ(P) - C(Q(P)) \tag{1}$$ Following ...
12
votes
2answers
935 views

How is freelancing viewed under Marxism?

How does Marxism view freelance workers? Since a freelancer is the owner of their means of production, are they still viewed as exploited by the bourgeoisie? Could freelancing exist in a Marxist ...
12
votes
1answer
247 views

Quality of French wine in the US vs French wine in France

I remember reading a study/paper saying that the AVERAGE bottle of french wine drunk in the US is better than the average bottle of french wine drunk in France, due to the fact that nobody bothers to ...
12
votes
4answers
74k views

What is the definition of exogenous and endogenous preferences?

Wikipedia states: Exogenous Preference -- one that comes from outside the model and is unexplained by the model. Endogenous Preference -- preferences then cannot be taken as given, but are ...
12
votes
2answers
391 views

The Case for Basic Income in developed and underdeveloped countries

From what I can tell, the idea of the basic income guarantee is very popular in some circles as an excellent alternative to a lot of modern welfare systems. Has anybody developed a theoretic or ...
12
votes
2answers
175 views

How could the Euro zone be broken up in an ordered way?

Let’s assume that the members of Euro zone all agreed that it would end in 18 months time with each country getting its own currency. What process could be put in place to allow this to happen ...
12
votes
2answers
3k views

What is the definition of a “Stackelberg leader-leader equilibrium”?

I have encountered the equilibrium concept of "Stackelberg leader-leader equilibrium" while reading Product Line Rivalry (AER, Brander and Eaton (1984). They say "we define a Stackelberg strategy as ...
12
votes
2answers
255 views

Economics of forgetting

I'm interested to know economic justifications of forgetting in various fields. On example is Green and Porter(1984). To sustain a Cartel, Cartel members have incentive to forget deviations in a ...
12
votes
4answers
7k views

Why does any treasury / central bank hold gold?

I know the US treasury is slowly selling its gold reserves, but what is the actual mission and purpose when it comes to the holdings? What is the reasoning behind the slow rate of liquidation? I have ...
12
votes
3answers
931 views

Why does China buy so much US treasury debt?

What is the reason that China buys so much US debt in form of Treasuries? How does this help the Chinese economy? It seems they are willing to give money to USA so USA economy can function better (...
12
votes
2answers
219 views

Why use empirical macroeconomic models when they are not policy invariant (Lucas Critique)?

With high probability this question is duplicate, and I tried to find one already in the community, but I was unsuccessful. According to the Lucas Critique, in its more general terms, the problem ...
12
votes
1answer
674 views

What are estimates of the elasticity of demand for credit with respect to interest rates?

When interest rates go up one percent (not one percentage point), what happens to demand for credit? I've only been able to find two papers in this area: Gross and Souleles (2001) study credit cards ...
12
votes
1answer
548 views

When does the Divine Equilibrium refinement coincide with that of Perfect Sequential Equilibrium?

In signaling games, it seems that the Cho Kreps refinement (intuitive criterion) is the go to refinement for eliminating bad sequential equilibria. Divine equilibrium and perfect sequential ...
12
votes
6answers
703 views

Does land value tax create an incentive to merge land ownerships?

LVT is "a tax on the unimproved value of land", and "in theory, it does not distort decision making". But if I own land then improvements such as buildings on my neighbour's land can easily increase ...
12
votes
2answers
779 views

$1.25 PPP per day poverty threshold - What precisely does it mean?

As Wikipedia states: In 2008, the World Bank came out with a revised figure of $1.25 at 2005 purchasing-power parity (PPP). (Update: In 2015, this was updated to $\$1.90$ at 2015 PPP.) Wikipedia ...
12
votes
0answers
342 views

Can I refine the set of equilibria in a signaling game to the sender-optimal outcome?

Main question: I've been reading about communication games a lot, and I'm wondering if there are good criteria to select between two separating-ish equilibria. I think of a separating equilibria as ...
11
votes
6answers
675 views

What metrics would indicate a house bubble rather than genuine market values?

There are concerns that Auckland, New Zealand, is currently experiencing a housing bubble. Auckland is one of the top 10 cities in the world on a housing unaffordability index. The question is - ...
11
votes
6answers
994 views

References to learn continuous-time dynamic programming

Does anyone know of good references to learn continuous-time dynamic programming? The references don't have to be books. They could be links to online resources as well. Links to clear, concise ...
11
votes
3answers
468 views

Price discrimination- how much is optimal?

I am of the understanding that as a general rule, price discrimination does not benefit consumers. Yet I can think of a situation where it does. Look at two countries, Australia and India. The price ...
11
votes
3answers
364 views

Can econometrics test for correlation or causality between prices and corruption?

This week there was news that some prices are rising. I heard that in some countries where corruption is high the prices are also higher. I wonder if there is causaility or just both at same. It would ...
11
votes
3answers
261 views

Self-selection bias during the course of experiments

Suppose you are running a randomized experiment to assess the effect of $X$, say some training program for unemployed people, on $Y$, say the chance of finding a job in the coming year. Suppose also ...
11
votes
3answers
4k views

Is scalping tickets harmful?

IMHO, scalping tickets is no different from legitimate arbitrage unless manipulative. Iirc, arbitrage increases surplus and hindering scalping is setting a price ceiling which leads to deadweight ...
11
votes
3answers
249 views

Influential Theory in the Economics of Poverty

As far as I can tell, research on the economics of poverty is very empirically driven, and this is probably appropriate. What kind of economic theory has been developed though? I'd also be interested ...
11
votes
2answers
11k views

Solow Model: Steady State v Balanced Growth Path

Okay, so I'm having real problems distinguishing between the Steady State concept and the balanced growth path in this model: $$ Y = K^\beta (AL)^{1-\beta} $$ I have been asked to derive the steady ...
11
votes
4answers
520 views

What are some good repositories for economic data

Economic data is a very broad concept. It can include discrete preference relation data-sets as well as extensive time series data. But it is important that theories are tested against data, and the ...
11
votes
3answers
587 views

Collusion and number of firms

How would you answer the following question? You work for a CEO of a large firm. He says to you, "In my experience collusion is less likely to be sustained as the number of firms in the market ...
11
votes
4answers
12k views

How does a country devalue its currency?

I recently read an article in the New York Times that talked about China devaluing its currency (which I believe is held to a peg against the US Dollar). My question is: specifically what tools does a ...
11
votes
2answers
197 views

Optimality of Zero Capital Taxation

The Chamley-Judd result of zero optimal capital taxation says that 0 capital taxation are required in order to maximize welfare at the steady state. The result is 30 years old. Still assuming that ...
11
votes
5answers
441 views

Why isn't the cost of shoes affected by their size?

I have noticed that many shoe selling shops I have visited have the same price tag regardless of the shoe size. Intuitively I'd think the bigger the shoe the more material and consequently capital ...
11
votes
2answers
4k views

Visualization tools for game theory: Game trees

There are many ways to draw a sequential game 'by hand'. By drawing the game I mean this: Displaying players' decision points, available actions and payoffs. Is there any way I can do this in R or a ...
11
votes
6answers
1k views

Did previous researchers fail to detect the hot hand simply because of a statistical fallacy?

Many basketball fans/players believe that having made several shots in a row, the next shot is more likely to go in. This is sometimes called the hot hand. Starting (I think) with Gilovich, Mallone, ...
11
votes
3answers
647 views

Intuitive explanation of $S(p,w)\cdot p=0$

Can anyone provide an intuitive explanation of why the Slutsky matrix right multiplied by the price vector yields a zero matrix? I know this is true but I do not really understand why it is true. ...
11
votes
2answers
969 views

Inflation and economic growth

Noticeable works about the impact of inflation on economic growth are dated back to the 90s. For example, Barro (1995): the impact effects from an increase in average inflation by 10 percentage ...

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