Questions tagged [information]

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Premises on which the Efficient Market Hypothesis is built upon

The Efficient Market Hypothesis tells us that stocks are "fairly priced" (i.e. not systematically over- or under-valued). That is, stock prices reflect all information that is already known about them....
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What are examples for the phenomenon that more (or better) information makes everybody worse off?

More information is usually considered "better". Let's say a rational agent chooses optimally given his information on the circumstances of a particular decision problem. Then providing him with more ...
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1answer
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Set of Bayes Correlated Equilibria when complete information is not available

Model Consider a game where a decision maker (DM) has to choose action $y\in \mathcal{Y}$ possibly without being fully aware of the state of the world. The state of the world has support $\mathcal{...
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2answers
66 views

Why is infinite recursion on the common knowledge assumption necessary?

If something is common knowledge in a game, that means that every player knows it, and every player knows that every player knows it, and so on. Are there cases where only one such level of knowing ...
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1answer
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How to interpret the intersected information partition element of different actors?

In this paper, it said that given $\omega$ is the current state of the world and $P_1(\omega)$ is the unique element from the information partition $\textit{P_1}$ of actor 1 in which the player 1 is ...
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2answers
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Do all prices just reflect absence of information?

In information economics, information has economic value because it allows an agent to make better decisions. For example if an agent needs to buy some good, he will benefit from knowing about the ...
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1answer
39 views

How to find change in the optimal choice with a utility function in general form?

Suppose the utility function is represented as $U(x_1,x_2;I)$, where $I$ is the level of information the consumer possesses. How to find the change in the optimal choice of $x_1$ as price of $x_1$ ...
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How far must one reason up the belief hierarchy?

In games of imperfect information, one must reason about the belief on the state of nature, the beliefs of other player's beliefs of their beliefs, and so on. This is referred to as the belief ...
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0answers
19 views

List of countries moved to developed economies in the last 50 years

I read in Bloomberg that five countries moved to advanced economies in the last 50 years from developing economies and one of them was Singapore. Wondering what are the other four countries? The ...
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25 views

Fama's Definition of Market Efficiency

I'm reading Fama's Nobel lecture "Two Pillars in Asset Pricing" and I'm a little confused by his mathematical definition of market efficiency. Here it is below: Suppose time is discrete, and $P_{t+...
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1answer
99 views

Why is it called Bayesian Persuasion?

I'm sure most of you are familiar with the paper titled "Bayesian Persuasion" by Kamenica and Gentzkow (2011), (you can find it here). I was wondering what are your thoughts as to why it is called "...
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1answer
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Robust asymmetric information?

Bergeman and Morris (2014) explain how the concept of Bayesian Correlated equilibrium contains all the robust predictions in games of incomplete information. In particular, their question is what are ...
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1answer
138 views

Insurance and Hirshleifer effect

I am trying to understand the statmement that 'public information kills insurance opportunity' -- referred to as Hirshleifer effect. Does it (in general) lead to some undesirable outcomes? Could you ...
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2answers
768 views

Why does the incentive compatibility constraint bind (moral hazard)?

Consider a very basic model of moral hazard with two possible effort levels $e_L<e_H$ and two possible levels of output $y_L<y_H$. If the agent doesn't participate, they get utility of $\bar{u}$....
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1answer
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Is there any reliable data on what % of the UK population currently earn less than £17,300 annually?

According to the Living Wage Foundation the "real living wage" in the UK is £9 an hour Which assuming a 37 hour week & rounding to the nearest whole GBP amounts to £17,375 Formula used ((9*37)/...
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1answer
56 views

Production choices in Hayek's theory of information-bearing prices

As I understand the work of Hayek, he asserts that prices encapsulate the true societal worth of the item being sold by integrating the compound need for all of the ingredients and work which go into ...
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1answer
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Is a hyperlink a kind of informational public good?

Links analysis algorithms on the web take the incoming links to a webpage as a sign of its popularity. Given this, can we consider web hyperlinks, in aggregate, as a kind of public good? I am curious ...
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38 views

Formulas or rules regarding End of Life for vehicle

Are there formulas or rules when keeping a vehicle is no longer financially beneficial? I understand the below needs to be considered: Every time a purchase is made, sales tax will need to be paid. ...
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2answers
135 views

Does there exist a mathematical formalization of Hayek's ideas about information and the price system?

Hayek's idea, roughly, is that individuals in aggregate have distributed knowledge about their own utility functions and about specific supply-conditions, that no single individual can oversee, and ...
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0answers
50 views

Common knowledge in model formulation and solution

Economics models usually assume that the structure of the economy is common knowledge among agents. Mathematically, an event is common knowledge if it lies in the meet of all agents' information ...
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1answer
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Higher order beliefs and coherency in game theory

I am reading about the higher order beliefs. Before getting into the formal definitions, I will define some common terminology which I will need for the formal definitions. If $X$ and $Y$ are two ...
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1answer
77 views

Why does optimal allocation call for unlimited distribution of information?

In his seminal paper Arrow (1962) states that information should be distributed without limit if an optimal allocation is to be achieved. Quote (p. 614-615): The cost of transmitting a given body ...
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1answer
41 views

Risk and Information

Does anyone know of some papers that look at how risk preferences affect demand for information (or related topics about the connection between risk and Information)? I took an information economics ...
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0answers
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Is maximal utility conditional on information linear in convex combinations of priors?

This is related to a Mathematica question here - https://math.stackexchange.com/q/1952779/374929 Is a (maximal expected utility) function of the form $U(\mu, X) \equiv \int_\Theta \int_\mathcal{X} \...
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2answers
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Does the government have a role to play in certifying people's abilities for the labor market?

The nature of information often makes it look like a public good. Is this the case for certification of peoples abilities? Is there a role the government could play in certifying people's abilities? ...
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407 views

How does monopoly affect the informational role of price?

It is said in the textbook "Intermediate Microeconomics a Modern Approach" by Hal Varian that monopoly affects the informational role of price. What's the mechanism?
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Proof that the diff-in-diff (wrt sample size) of the expectation of a first-order statistic is positive (Stigler 1961)

I'm trying to prove a claim made in Stigler (1961), "The Economics of Information." This claim has to do with showing that the marginal benefit of making an additional search (e.g., searching an ...
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1answer
71 views

Evidence that open source production processes increase efficiency and/or consumer surplus?

Is there peer reviewed evidence that open source production processes increase efficiency and/or consumer surplus? It seems that the first theorem of welfare economics requires complete markets which ...
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2answers
64 views

Effect of information on stock indices

The rules for including a stock in indices such as S&P 500 are common knowledge, so everyone can know when e.g. company B is going to enter the index instead of company A. Since ETFs and mutual ...
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4answers
660 views

The Backward Bending Supply Curve, Asymmetric Information, and Monopoly

This recent question about when monopoly is undesirable made me curious about when monopoly is actually desirable? I was reminded of an argument for the efficiency of monopolies when moral hazard ...
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3answers
525 views

What are some theoretical explanations for deviations from the efficient market hypothesis?

According (the semi-strong form of) the efficient market hypothesis, the price of an asset should reflect all publicly available information about the 'fundamental value' of that asset. The reasoning ...