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43 views

GMM: Under What Conditions Does Adding a Seemingly Unrelated Moment Condition Increase Efficiency?

For simplicity, I'll offer the simplest of endogenous models. Suppose we have the following scalar model: $y=\beta x+u$ where $E[ux]\neq 0,\;E[uz]=0\; \text{and}\;E[u^2|z]=\sigma^2$ Clearly we can ...
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124 views

What is the difference between the discrete choice method and the generalised cost method in transport planning?

I have been using the generalised cost method in an agent based model. The generalised cost method enables each individual agent to make a decision on what mode of transport it will take given a range ...
3
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0answers
79 views

One-Step estimators for non-linear regression

Let's suppose I have $\sqrt{N}$-consistent estimate, $\beta^{*}$(vector, but couldn't put it in bold), then doing the Gauss-Newton Regression, i.e. $\mathbf{y}-\mathbf{x}(\beta^{*})=D_\mathbf{x}(\beta^...
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117 views

Causes of upward trend in median first marriage age in USA?

I found a chart here of median age at first marriage by year from 1890 to 2010. It looks like it dips to a low during the 60s then has an upward trend until 2010. As an answer, I'm looking for any ...
3
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0answers
17 views

Help Finding Information on “Power Trends” or “Polynomial Trends”

I need to prove some facts about the asymptotic OLS estimator, $\hat{\delta}$ in model: $ y_t = \alpha_t + \delta \cdot t^b + \epsilon_t $ where $\epsilon_t \sim iid(0,\sigma^2)$. I've looked at ...
3
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0answers
45 views

Utility theory or decision theory based on partial semiorders?

Roubens, Vincke & Pirlot have summarized and extended representation theorems for partial semiorders in the 80s and 90s. See e.g. Roubens, M. & Vincke, P.: Preference Modelling. Springer, 1985....
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0answers
43 views

What models exist that explain which people emigrate to another country?

I'm looking for papers about this, or if there's a pretty standard model across many papers, then maybe just a rundown of the model. I'd like to use the model in an econometric analysis. For example, ...
3
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51 views

Gaussian Affine Model and CAPM

When I assume an one-factor Gaussian term structure model such as the Vasicek model $dr_t = \kappa(\mu - r_t)dt + \sigma dW_t$ and specify a constant market price of risk of $dW$ to be $\lambda_t = \...
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184 views

Reference Request: Cost Benefit Analysis of Conversion of Undeveloped Land for Housing

London is surrounded by a "green belt", a large area which government policy has protected from housing development. The current high cost of housing in London has led some to advocate a selective ...
3
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0answers
135 views

Question about M.I.U. model - Walsh

I am solving practice problems in Walsh. This is from 3rd edition page 87. Question 1. I have max: $$U=\sum\beta^iU(c_{t+i},\frac{M_{t+i}}{P_{t+i}})$$ s.t. $$\omega_t=f(k_{t-1})+(1-\delta)k_{t-1}+...
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146 views

Job-finding rate in an urn-ball model with types

Setup Say you have two types of workers, high and low. The share of low-types among the unemployed population is $P$. I want to find the job-finding rate for these types. Matching Matching is ...
3
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340 views

Calculating price in a pure exchange economy

The problem is simple, I'm not really sure of my answer though. Consider an economy where there are two consumers and two goods: $$U_1(x_{11}, x_{21}) = x_{11}$$ $$U_2(x_{12}, x_{22}) = x_{22}$$ $...
3
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142 views

Structural estimation

My understanding of structural estimation follows the lines beautifully lectured by Christophe Taber (U. of Wisconsin): Identify the policy question to be answered Write down a model that can ...
3
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0answers
26 views

Have there been any structural changes in the market that would lead the indexes to be trading so high?

If you look at this graph of the SnP500: You will see that it is trading at levels higher than pre 08 or 99. What systemic structural changes in the market have led it to be trading so high? I think ...
3
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109 views

How does Schumpeter's view of capitalism's demise fit in with the importance he placed on innovation?

Schumpeter is widely remembered for his belief in the power of innovation and entrepreneurship within a capitalist framework. In fact he argues that capitalism owes much of its success to this. Yet, ...
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145 views

Partial R2 and contribution of Regressors

I asked a similar question on Cross Validated, but got no answer. The following question is sufficiently different. Consider the following deterministic relationship:$$Y_{t}=C_{t}+I_{t}+G_{t}+(X_{t}-...
3
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1answer
135 views

Definition: Extractive Goods (Comtrades HS-Categorization)

I'm currently writing a paper on China in Africa and I'd like to compare Africas Exports to China with its exports to Europe and the USA. More specifically I'd like to find out if the Exports to China ...
3
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0answers
590 views

With a depreciation of real exchange rate, what happens to the trade balance equilibrium output?

Let the real exchange rate $Q=\frac{P^*e}{P}$, where $P^*$ is the 'world' price level (everything with '*' is of the 'world'), $P$ is the domestic price level, and $e =\frac{\text{Home Currency}}{\...
3
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0answers
49 views

Terminology and formalization for “anonymous” game forms

I have an intuitive notion of what an "anonymous" (extensive) game form $\Gamma$ is. In my mind an "anonymous" game is a game in which the players' identity does not matter. This includes the (again ...
3
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0answers
78 views

Is $\frac{ \Delta \ \text{endogenous variable}_1 }{\Delta \ \text{endogenous variable}_2}$ well-defined … and what is it?

When solving economic models, wec get expressions of endogenous variables (say, production $P$, or consumption $C$) in terms of parameters or exogenous variales, and we can then ask what the change in,...
3
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2answers
880 views

What happens when I leave out empty cells in regression?

I'm using Stata 14.1 to do a regression, and I got a matsize too small error. It gave some more output to tell me possible reasons for this problem, and I think ...
3
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0answers
215 views

Systematic measurement error in explanatory variable

In the classical errors-in-variables problem, we are looking at the effect of $x^*_i$ on $y$, but $x^*_i$ is misreported. We have observations $x_i = x^*_i +u_i$, where $u_i$ has zero mean mean, ...
3
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0answers
188 views

SAS: How to do ARIMA procedure with structural break?

So it seems like my data has a structural break in it, using Box-Jenkins methodology and evaluation such as ADF test wont give appropriate forecasts/results if I do not correct for the structural ...
3
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0answers
57 views

Exponential Moving Average smoothing factor

I learn best my reading about a concept and then trying to implement it using math and a programming language. Right now, I'm trying to implement an Exponential Moving Average indicator, but I'm ...
3
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0answers
308 views

Can the social planner problem be reduced to a Pareto problem or a Walrasian equilibrium problem?

The social planner problem is \begin{align} \max_{\lbrace x_i,y_i,x_j,y_j \rbrace } &\theta_i U_i(x_i,y_i) +\theta_j U_i(x_j,y_j) \\ & \text{s.t.}\\ &x_i+x_j = \omega_i^x + \omega_j^x\\ &...
3
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0answers
67 views

Competitive Equilibrium in Securities Market: First Welfare Theorem

I'm working through Kerry Back's "Asset Pricing and Portfolio Choice Theory" book. Trying to work through the proof of the First Welfare Theorem in the context of securities markets on page 58. Back ...
3
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0answers
30 views

Using US foreign tax policy to offset a raise in interest rates

I am an amateur economist at best, more a person with an economic BS looking to explore data science (I will be using python). I have a theory that I want opinion on that will allow the Fed to raise ...
3
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0answers
85 views

Currency Peg or Currency Substitution/Dollarize?

Why would a sovereign state choose an exchange rate peg over the demonetization of the local currency, replaced by hard currency? In the case of the West and Central African CFA Francs, France has an ...
3
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0answers
211 views

Forecast of ARMA-GARCH model in R

I managed to forecast a GARCH model yesterday and run a Monte Carlo simulation on R. Nevertheless, I can't do the same with an ARMA-GARCH. I tested 4 different method but without achieving an ARMA-...
3
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0answers
51 views

How do organisations diversify? Determinants of choosing new target industries

A very weird question I agree. I am interested in understanding the motives behind firm behaviours of diversification. Why would some firms choose new target sectors/activities? Is there any ...
3
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0answers
40 views

Any serious macro models for Greece's possible default or eurozone exit?

Since each news outlet says something about Greece these days, I wonder what serious economic research backs decisions made over the last seven years? The IMF papers on austerity, both early ones and ...
3
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0answers
125 views

Appropriate economic/econometric tools to analyze segmented promotion optimization problem

I'm trying to determine which micro-economic/econometrics concepts, models, and/or tools are appropriate for an analysis of promotions. Below I Describe the problem in general terms Give ...
3
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0answers
67 views

Converging Trajectories and Sufficiency for Optimality

(The question is loosely relatet to this thread.) In the paper "Feedback Equilibria for a class of non-linear Differential Games" by Mäler et al. it is stated (p. 14) In fact sufficiency is ...
3
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0answers
211 views

Estimation technique: Independent variable (taxation) unknown

I am trying to estimate $\lambda$ from this equation: $(1+ t_t) = \left(\dfrac{C_t}{Y_t}\right)^{\frac{1-\lambda}{\lambda}}$ After taking logs and approximations, I get: $t_t \approx \left( \frac{1-...
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0answers
1k views

How do I convert real gdp into chained-dollar real GDP?

I have quarterly data for real GDP from 1981-2015. I also have quarterly chained-dollar real GDP from 61-2012. I need to have them converted into one series. I've looked up several different formulas ...
3
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0answers
131 views

Proof of Proposition 1.4 from Microfoundations I by Kreps

Regardless of the size of X (set of all possible objects), if a preference relation which is complete and transitive is defined on it, then the corresponding choice function generated by it will ...
3
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0answers
107 views

Difference-in-Difference on State Sales Tax Rates

In an attempt to evaluate a potential U.S. National Sales tax rate, it was suggested on this forum before that I consider a difference-in-difference on state sales tax rates before and after they ...
3
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0answers
61 views

Optimisation of bonds

I'm doing an optimisation problem but don't understand what the terms mean. Suppose someone wants to invest $110,000. They have 4 choices as to what they invest their money into: municipal bond ...
3
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0answers
105 views

Solving this system of ODE

I have the following system of equations $$ \rho V(u, \epsilon^i) = F(u, \epsilon^i) + V_u(u, \epsilon^i)g(u, V(u, \epsilon^i) + \lambda^i \left(V(u, \epsilon^{-i}) - V(u, \epsilon^i)\right)$$ with $...
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0answers
138 views

Ultrafilters in Social Choice Theory Literature Request

I am an undergraduate math major who is intrigued about social choice theory. I am in the early stages of planning my senior project and was wondering if anybody had some recommendations of literature ...
3
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0answers
138 views

Equal Payment Series

The question is: A man is planning to retire in 20 years. Money can be deposited at 8%, compounded monthly. It is estimated that the future general inflation rate will be 3% compounded annually. What ...
3
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0answers
192 views

Production in the long run - calculating wage and rental elasticity of demand

I have data for a business firm for two periods. The data include: output (Q), capital (K), labor (L), wage (W) and the rental rate of capital (R). Here they are: ...
3
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0answers
169 views

Optimal commodity taxation - solving for the optimal tax rates?

I need to solve for optimal tax rates for two products. In my model there are N identical households that maximize their utility function subject to a budget ...
3
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0answers
148 views

Kolmogorov-Forward-Equation with Entry and Exit

I'll try to ask this question in the most simplistic environment possible, so lets think about a household that can consume and save. After some cumbersome work, we have solved for the optimal savings ...
3
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0answers
121 views

Wold Decomposition and autocorrelations of AR

Is it possible to retrieve Autocorrelations ( value or any other info) up to a certain lag for an AR(2) stationary model using the Wold decomposition? Example: $$X_t=0.32X_{t-1}+0.51X_{t-2}+ \...
3
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0answers
39 views

Real time data map about the amount of a currency that are held in the world ?

Where can I see in real time data about the amount of a currency that is held in central banks (and maybe other significant places) ? A map would be great. I would like to know if there is an ...
3
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0answers
41 views

Research on the link of QE and increased economic activity

Im looking for good literature of quantitative easing and the effects on economic actitivty. from a modelling perspective Any empirical research? What I am thinking of, is how much of an effect ...
3
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0answers
96 views

Europe not self-sufficient in terms of food requirements and consumption?

An acquaintance once told me that Europe is not self-sufficient in terms of food consumption as it does not have enough farmland and farmers to produce enough for all its people, especially in terms ...
3
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0answers
130 views

Applying the Martingale central limit theorem to the score process of an autoregressive model

This question is a natural continuation of the following question: How do I construct the score process of a Markov model and verify that it is a Martingale? In this problem, we set up as follows: ...
3
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0answers
102 views

Differences between LATE and Heckman Selection

I have heard that a paper by Heckman and Vytlacil demonstrate comparisons between nonparametric Heckman selection (NP Heckit) and the LATE (local average treatment effect) framework. Could someone ...

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