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10
votes
2answers
637 views

Can the Machina Paradox be solved by expanding the choice set?

In another question, the Machina paradox is mentioned as a possible counterexample to the expected utility model: Adding to the list of paradoxes, consider Machina's paradox. It is described in Mas-...
10
votes
2answers
5k views

Difference-in-differences in 2SLS regression

Usually when we do a difference-in-differences estimation, we do it in a OLS reduced form as follows: $$ Y_{it}=\alpha After_t+\gamma Treatment_i+\delta After*Treatment_{i,t}+X_{it}\beta+\epsilon_{i,...
10
votes
1answer
260 views

Price dispersion in online retail

There are a number of online booksellers that are popular in India right now. The prices they charge for the same book often differ by as much as 10% (See this price comparison site to check http://...
10
votes
3answers
228 views

Why is bargaining more common in poor countries?

In poor countries, one might bargain over even say a bottle of water. This is unthinkable in most rich countries. (And in countries that develop rapidly, one can actually notice the steady movement ...
10
votes
1answer
414 views

Situations where revelation principle may not hold

Revelation principle is a powerful statement regarding Bayesian Nash equilibrium. However it may not hold always, as where players do not fully know their preferences, or when preference elicitation ...
10
votes
1answer
245 views

Has the assumption that individuals' tastes do not change over time been rigorously challenged?

In their seminal paper De Gustibus non est Disputandum, Stigler and Becker (1977) surveyed four classes of phenomena widely believed to be inconsistent with the stability of tastes: addiction, ...
10
votes
1answer
207 views

Why do stock exchanges not operate at a fixed frequency?

Would this not be more fair towards traders who don't trade at high frequency? And would it not be possible to distribute this fixed frequency to other exchanges, modulo relativity? The reason I'm ...
10
votes
2answers
290 views

How does GNU software development sustain economically?

I apologise if this question is out of topic, but it is simultaneously an economy and a programming question. If it should go to another SE communality, please indicate me. In theory, GNU software is ...
10
votes
3answers
824 views

When treating a relative, normalized utility function as a pmf, what is the interpretation of Shannon entropy or Shannon information?

Suppose $\Omega$ is a set of mutually exclusive outcomes of a discrete random variable and $f$ is a utility function where $0 < f(\omega) \leq 1$, $\sum_\Omega f(\omega) = 1$, etc. When $f$ is ...
10
votes
3answers
2k views

Under what conditions is a monopoly undesirable?

First of all, I realize that "undesirable" is an ambiguous term. So, to clarify, when is a monopoly undesirable under the following metrics? Pareto efficiency Reduces consumer surplus Social Welfare (...
10
votes
3answers
1k views

CES Production Function with $\rho>1$

In using CES production functions of the form $f(x_1,x_2)=(x_1^\rho+x_2^\rho)^{1/\rho} $, we always assume that $\rho\leq1$. Why do we make that assumption? I understand that if $\rho>1$, the ...
10
votes
2answers
218 views

When should a receiver randomize across actions in a signaling game?

Suppose there is a signaling game with a finite message space $M$, finite action space $A$, and finite type space $T$. Even simpler, all sender types have identical preferences (the receiver just ...
10
votes
1answer
3k views

Homogenous of degree one in utility function.

Question My solution is as follows. Please check my solution. If I make a mistake, please tell. I am really not sure about my solution. Thank you U(x) is homogenous of degree one i.e. u(...
10
votes
5answers
5k views

Productivity vs real earnings in the US — what happened ca 1974?

Somewhat related to the most recent US elections, I've been researching the whole "white working class" situation, and one strange anomaly has popped up. When one looks at a graph of productivity (...
10
votes
1answer
716 views

Examples of Applied Micro Paper with R (!) Code and Data in Public Repository

Can anyone suggest examples of relatively simple applied micro papers (e.g. an RCT or straightforward regression model) of possible interest to a general audience, that have their data and code, ...
10
votes
2answers
138 views

Does 'ethical investing' have any effect?

Some mutual funds make a point of only investing in ethical companies (eg avoiding arms companies, polluters, human rights violators, etc). Or other organisations pressure funds to stop investing in ...
10
votes
2answers
177 views

Fair voting procedure when there are many issues

When several people have to decide about a single yes/no issue*, the natural decision rule to use is the majority rule. But when there are many issues to decide upon, the majority rule is "unfair" ...
10
votes
1answer
353 views

Are there fundamental reasons why (exponential) economic growth is highly desirable?

One of the most widely published measures of the economy is the economic growth as a % of the GDP; i.e. the degree to which an economy grows exponentially. In my understanding, when the rate of ...
10
votes
1answer
328 views

Straub and Werning, 2014, on zero capital taxation

This is a test balloon to see whether these kinds of questions are appreciated/welcome on Econ.SE: I had a hard time grasping Straub and Werning (2014) (no paywall). I understand the general ...
10
votes
1answer
182 views

Do large public companies ever “quit while they're ahead”?

Large public companies (e.g. S&P 500) seem to end their lives in one of two ways: either they're acquired (or taken private), or they go bankrupt. Theoretically it seems like there should be a ...
10
votes
0answers
714 views

Modern theory of integrability of demand?

I am aware of Hurwickz Uzawa work in integability, neatly summarized by Border http://people.hss.caltech.edu/~kcb/Notes/Demand4-Integrability.pdf I am wondering if there is any modern treatment of the ...
9
votes
2answers
5k views

Does recycling lead to fewer jobs?

Say I buy a glass bottle, I can either put it in the landfill or recycle it. My understanding is, glass will breakdown into sand. (Not sure how well though, since we sometimes find glass from Roman ...
9
votes
4answers
5k views

Why are high/rising property values considered a good thing?

Increasing prices for housing are pretty much universally treated as positive in the news and in political discourse: newspapers run headlines like "Good news: Home values are up" and talk about "...
9
votes
5answers
516 views

What kind of economic freeware exists for economics students?

Can anyone recommend some free software for students studying economics for use in senior projects, theses, or dissertations?
9
votes
3answers
15k views

Prove the sample variance is an unbiased estimator

I have to prove that the sample variance is an unbiased estimator. What is is asked exactly is to show that following estimator of the sample variance is unbiased: $s^2=\frac{1}{n-1}\sum\limits_{i=1}^...
9
votes
3answers
1k views

Is Marx considered an important classical economist?

In a post on the politics stack exchange, I came across the following description of how Marxism fits into the history of economic thought: Most professional economists consider Marx' work on ...
9
votes
4answers
3k views

Why is economic growth measured exponentially rather than linearly?

If economic growth is indeed highly desirable (see this question), why must this growth be exponential? With finite resources, exponential growth might hit limits rapidly (or be impossible?). Why not ...
9
votes
7answers
2k views

Macroeconomics Textbook on New-Keynesian models

I'm looking for textbooks that explain the New-Keynesian models, without taking shortcuts on the mathematics, that would go in depth on the derivations of the formulas. I appreciate rigour, and ...
9
votes
5answers
1k views

Are terrorists rational?

Terrorism in general, and suicidal terrorism in particular, is popularly seen as “irrational,” but many economists and political scientists argue otherwise. This quote is from Terrorism: The ...
9
votes
5answers
3k 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
2k views

Has the world become poorer?

This question is not backed by serious economic research but mainly by a very simple attempt to look at how the world economy has changed. I am asking whether and why the world has, over the past 50 ...
9
votes
7answers
4k views

What are the known / alleged problems against using energy as currency?

What are the known (and alleged) problems of using Joules (i.e. a measure of energy/work) as a currency? I tried to find such idea in Google (searched terms like "technocracy", since someone told me ...
9
votes
3answers
2k views

Can the stock market show indefinite exponential growth?

In a comments on a question on money.SE, the following dialog took place: Eventually there will not be enough matter to represent all the money, so we know for certain that the answer is "No" for a ...
9
votes
5answers
1k views

Why don't Burgers cost 5 cents?

In this blog post, economist Bob Murphy raises a puzzle involving the principle that in a competitive market, the price equals the marginal cost: There’s a general principle from intro to ...
9
votes
3answers
340 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 ...
9
votes
3answers
1k views

In log-linearized New Keynesian model, what do $Y$, $Y_t$, $y_t$ actually mean?

This may be a weird question, but I am unfortunately confused by terms. Let us suppose log-linearized New Keynesian model as suggested by Gali here: http://crei.cat/people/gali/pdf_files/monograph/...
9
votes
3answers
2k views

Why absolute value in elasticities and marginal rate of substitution?

This is a point I find very confusing and very hard to justify to students. Depending on the books, one finds many different conventions regarding the sign of elasticities and marginal rate of ...
9
votes
6answers
909 views

Piracy/File sharing - Why aren't songs, movies or books given for free?

Why aren't songs, movies or books given for free (+ads)? i. Every minute, people are pirating and there is no stopping that. If people see 0.99 for a song on iTunes and 0.00 for a song on a torrent ...
9
votes
2answers
262 views

Why is 10% the necessary upper bound for a negative interest rate?

Source: p 710, Economics, 3 Ed, 2014, by N G Mankiw, M P Taylor ... In that same article, Professor Mankiw recounted a discussion with one of his graduate students at Harvard about a scheme, put ...
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 $A$. ...
9
votes
8answers
75k views

How interest rate affects currency

I am quite new to economics. I was reading about changes in interest rates and its effect on currency value. The fact is as interest rates increases, the currency value also increases and vice versa....
9
votes
2answers
9k views

How can nominal interest rates be negative?

It used to be (and perhaps still is) standard to teach in economics classes that the nominal interest rate cannot possibly be negative. So why have some nominal interest rates gone negative? Quote ...
9
votes
3answers
52k views

What is the difference between intensive margin and extensive margin in labor economics?

What is the difference between intensive margin and extensive margin in labor economics, or general RBC model, where we talk about labor-hours supplied changing with extensive margin or intensive ...
9
votes
1answer
1k views

Why is capital often not included in New Keynesian models? Is there a reason other than modeling difficulty?

In New Keynesian models, like the ones in Gali's simple New Keynesian model or even Mankiw-Reis NK model on sticky information, capital is often not included. Now people do say that there are ...
9
votes
2answers
888 views

Thin indifference curves

If a consumer follows the rationality axiom of continuity (i.e. no jumps in his preferences), the indifference curves of a utility function are said to be thin. Why does continuity ($x \succeq y \...
9
votes
3answers
3k views

Why does the Brexit cause a fall in crude oil prices?

Oil prices have also fallen sharply in the wake of the referendum outcome, with Brent crude down 5.2%. The price of Brent crude fell by \$2.68 to \$48.24 a barrel, its biggest fall since February. ...
9
votes
2answers
470 views

Where to start with social networks?

I'm working on my master's thesis in industrial organization and I have a model that is based on social networks. I have had two courses about social networks (one more focused on basic industrial ...
9
votes
3answers
10k views

How to show that a homothetic utility function has demand functions which are linear in income

A homothetic utility function is one which is a monotonic transformation of a homogeneous utility function. I am asked to show that if a utility function is homothetic then the associated demand ...
9
votes
2answers
964 views

When can one safely talk about decreasing marginal utility?

One thing I hear a lot is talk of decreasing marginal utility—the idea being that additional units of a good become progressively less attractive the more units of that good one has already. However, ...
9
votes
4answers
2k views

Macroeconomics for Mathematicians

I'm coming from a math background (so my mind is set up for Definitions-Observation-Lemma-Proof frameworks) and looking for recommendations of a Macroeconomics textbook mainly devoted to growth models ...

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