All Questions

Filter by
Sorted by
Tagged with
74
votes
5answers
17k views

Why is the oil future price negative?

I don't understand why the price of oil futures went negative today. News say it is because sellers cannot sell it. But, why don't they just hoard it until the coronavirus crisis is off? Why don't ...
63
votes
4answers
13k views

Why do economists disagree so much?

I'm coming at this from a scientific point of view, having had no formal training in economics - most of what I know about it was from self-studying an undergraduate economics textbook. My question ...
23
votes
4answers
79k views

Partial vs. general equilibrium

Microeconomic models are usually classified as partial and general equilibrium models. As a layman, I understand that partial equilibrium focuses attention on a few economic variables to find the ...
16
votes
5answers
4k views

Topological concepts in economic theory

QUESTION: What are the major or systematic applications of post-1960s mathematics to microeconomics? For example, in the late 19th century, Fisher first used the mathematical ideas of Gibbs to ...
48
votes
8answers
8k views

How do economists explain why people contribute to Wikipedia?

What incentives do contributors have? I believe they earn no money. And usually, they earn no reputation either, because most of the contributions are anonymous. I believe this is a public goods game. ...
28
votes
3answers
9k views

How to intuitively understand the 'Intuitive criterion'?

The intuitive criterion by Cho and Kreps is a refinement to minimise the set of perfect Bayesian equilibria in signalling games. What would a simple and intuitive example to explain this criterion be? ...
22
votes
6answers
5k views

How do Marxist economists solve the Diamond-Water Paradox?

For class surveying different economic systems, I read a book on Marxism and its core beliefs. As I read, I came to learn that the Marxist view of economics depends heavily on the Labor Theory of ...
19
votes
3answers
645 views

When Optimal Control fails (?)

In order to "ask my question", I have to solve a model first. I will omit some steps but still, this will unavoidably make this post very long -so this is also a test to see whether this community ...
14
votes
5answers
7k 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 ...
13
votes
3answers
324 views

What have been the main developments in macroeconomics and financial economics since the 2008 financial crisis?

In the aftermath of 2008 economists were, fairly or not, blamed for a failure to foresee the coming crisis. Ideas such as "The Great Moderation" and market efficiency were openly ridiculed as ...
16
votes
4answers
4k views

Why is fractional reserve banking allowed?

I learned about banks' fractional reserves and that revolted me. How is that not considered to be fraud? The idea doesn't seem too sophisticated, on the contrary, it sounds very simple: the bank ...
14
votes
2answers
12k views

The relationship between the expenditure function and many others!

I dont understand the relationships between Hicksian demand, walrasian demand (marshallian), the expenditure function and the indirect utility function (including the value function V(b)). I have ...
14
votes
5answers
5k views

What was economics like as a field before Adam Smith, the father of *modern* economics?

Adam Smith is called the "father of modern economics" and his book The Weath of Nations, a fundamental work in the field of economics, is considered the first modern book on economics. In addition, ...
35
votes
6answers
10k views

If someone goes for a haircut, does it increase GDP?

If I go for a haircut, am I causing the GDP to rise because consumption is rising?
15
votes
1answer
2k views

How could the economic cost of the world not speaking the same language be estimated?

While languages are fun and add color and flair to cultures and make the world a more interesting place, they also have a cost. Beyond the monetary costs of translation/editing/proofreading, ...
14
votes
2answers
976 views

How do reserves move between the 12 federal reserve banks?

In single central banks systems (e.g. Bank of England) then the final ledger for electronic money transfer is the adjustment of reserve account balances. In the Federal Reserve System, there are 12 ...
14
votes
4answers
2k views

Use of mathematics and imprecise definition of terms

As a postgraduate student of economics I've been trying to expand my mathematical "toolset". While doing so I've talked to engineers, physicists and mathematicians, many of which have ...
13
votes
2answers
426 views

Uses of convex analysis in Economics

I'm taking kind of a crash-course in convex analysis to complement my mathematical skills and was wondering if anyone knew about nice ways in which this kind of tools were used in Economics. To be ...
13
votes
2answers
4k views

Larry Summers on the causes of secular stagnation

In an influential speech on November 8, 2013 at the IMF Annual Research Conference, Larry Summers suggested that slow economic growth in the years following the 2007–2008 financial crisis might be due ...
11
votes
2answers
13k 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 ...
9
votes
3answers
1k views

Does risk aversion cause diminishing marginal utility, or vice versa?

Let $A$ be the set of possible states of the world, or possible preferences a person could have. Let $G(A)$ be the set of "gambles" or "lotteries", i.e. the set of probability distributions over $A$. ...
6
votes
3answers
2k views

The Sonnenschein-Mantel-Debreu results, what are the implications for macroeconomics?

I have always wondered why such a negative result such as Sonnenschein–Mantel–Debreu theorem (SMD) theorem is usually ignored or disregarded by practitioners, specially in macro. The result roughly ...
19
votes
7answers
16k views

Why do different countries have different currency?

Why do different countries have different currency? I have this question because I want to know why to divide it? If it's not divided then we can easily use the money anywhere and we won't need to ...
14
votes
3answers
191 views

Current knowledge about the empirics of consumer theory

I would like to get up to speed on the current state of empirical work done to test the assumptions and predictions of consumer theory (think Chapters 1, 2, 3, and 6 of Mas-Colell et al.). Can anyone ...
13
votes
5answers
4k views

Econometrics: Is elasticity meaningful in my, or any, regression?

A few months ago I interned at this organization; and, as a going away present, I decided to spend my last week, with whatever off time I had, to investigate the factors that affect teacher salaries. ...
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
1answer
460 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. \...
11
votes
5answers
23k 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 ...
8
votes
4answers
240 views

Can absence of inflation be accounted for by a reconfigured class structure?

A previous and oft-heard question asked why no inflation results from the Fed pumping money into the economy. Are we simply seeing a methodical wage suppression, thus no official "inflation," while ...
8
votes
1answer
379 views

Alternative way of deriving OLS coefficients

In another question of mine, an answerer used the following derivation of OLS coefficient: We have a model: $$ Y = X_1 \beta + X_2 \beta_2 + Z \gamma + \varepsilon, $$ where $Z$ is unobserved. Then ...
8
votes
1answer
11k views

No Ponzi game condition and transversality condition are the same?

Given the following non-stochastic planning problem with finite horizon, \begin{align} &\max_{\{k_{t+1}\}}\sum^T_{t=0}\beta^tU[f(k_t-k_{t+1})] \\ \text{s.t. } & 0\leq k_{t+1}\leq f(k_t)\\ &...
6
votes
8answers
17k views

Why does quantity supplied increase with price in economics?

The Law of Supply is my worst enemy in economics because I could never truly understand it, and as a result, the stuff I learned after that was built on a weak foundation. The Law of Demand is totally ...
5
votes
2answers
250 views

Foundational equations or concepts of Finance

For the other sciences it´s easy to point to the most important equations, inequalities, propositions or concepts that ground the discipline. If I want to explain Finance to a physicist say, what are ...
4
votes
3answers
398 views

Is money mostly created (out of nothing) by banks making loans?

In the Bank of England's Quarterly Bulletin, 2014 Q1, McLeay, Radia, & Thomas write a pair of articles titled: "Money in the modern economy: an introduction" and "Money creation in ...
20
votes
6answers
4k views

What is the likely result of rent control in Berlin?

What predictions does economics make about the likely result of this policy in Berlin of capping rent prices. Berlin is freezing the rents of 1.5 million apartments for the next five years starting ...
15
votes
2answers
2k views

How is price elasticity determined in practice?

Price elasticity of demand and Price elasticity of supply are two of the most important concepts of microeconomics, but they're generally explained from a hypothetical standpoint, and little effort is ...
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
4answers
898 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
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
3answers
885 views

Understanding the construction of stochastic processes

I've seen stochastic processes modeled/constructed in the following way. Consider the probability space $(\Omega, \mathcal F, Pr)$ and let $\mathbb S$ be the (measurable) transformation $\...
11
votes
3answers
280 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 ...
9
votes
5answers
4k views

Can the stock market grow faster than GDP indefinitely?

My understanding of conventional wisdom is that average long-term growth of advanced economies is expected to be significantly lower than the average long-term growth of the value of the largest firms ...
9
votes
4answers
3k views

What are some good graduate-level econometrics books for someone with a strong mathematics background?

Related: Book recommendations on empirical methods in economic research and econometrics? I would like to focus mainly on graduate texts in Econometrics. From the question above, I gather that ...
9
votes
3answers
378 views

Which capital accumulation is right? $K_t = (1-\delta)K_{t-1} +I_t$ or $K_t = (1-\delta)K_{t-1}+I_{t-1}$?

In a lot of models with capital, I find different variants of capital accumulation formula as follows: $K_t = (1-\delta)K_{t-1} +I_t$ or $K_t = (1-\delta)K_{t-1}+I_{t-1}$ Which one is more ...
8
votes
3answers
870 views

Book Recommendation for Microeconometrics of Discrete Data

I am looking for a few good books pitched at different levels to help analyse discrete data. Specifically: Specification, Estimation and the application of econometric methods to model discrete ...
8
votes
1answer
225 views

A timeline on the the key achievements of Economics and its evolution

Something I've never seen in Economics but have in Maths and Chemistry and really enjoyed is that when I took it we got to the see the evolution of the science (and yes Economics is a [social] science ...
8
votes
4answers
2k views

Correlation between salary level and housing prices in a town

Is there a measurable correlation in a town between salary level and housing prices? Or, to put it differently: is it politically meaningful to drive up salaries by new investments if the result is ...
7
votes
6answers
1k views

Graduate Level Textbook on Labor Economics and Macro-Labor

What would be good textbooks at the graduate level that deal with Labor Economics and Labor-Macro (As in, Equilibrium Unemployment Theory, Shimer Puzzle etc)?
7
votes
4answers
3k views

Is market failure constant? What properly defines it?

My textbook defines market failure as when "the production or consumption of a good or service causes additional positive or negative externalities on a third party not involved in the economic ...
7
votes
1answer
1k views

Deriving formulas from Gali's book on the New Keynesian model

I've found this link with all the derivations from Gali's book on New Keynesian model. In page 13, eq. $(3.7)$, the author derives the optimal price-setting rule $P_t^*$ by a representative firm that ...

15 30 50 per page
1
3 4
5
6 7
15