Questions tagged [endogeneity]

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0answers
46 views

Predicting covariates into “observed” and “unobserved” part

I recently saw a paper where they run a regression of the covariate of interest $X_{1}$ on the outcome $Y\in\{0,1\}$ without further controls $$ Y = \alpha_{1} + \beta_{1} X_{1} + \epsilon_{1} \tag{1}...
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1answer
146 views

Is this an an endogeneity/simultaneity problem?

I would like to know if the logic in these two situations is correct. Situation 1: Let's say we have a continuous dependent variable, $y_1$, that then has a causal impact on an unobserved variable, $\...
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0answers
25 views

Is this an endogeneity problem?

Let's say we want to determine the impact of $y_2$ on $y_1$, which are related as follows: $$y_1 = f(y_2, x_1,e)$$ where $$e = g(y_3,x_2, u_1), \space y_2 = h(y_4,x_3, u_2), \space y_3 = m(y_4, x_4,...
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0answers
14 views

Verification of logic behind instrumental variable approach

I would like to know whether the following reasoning regarding the instrumental variable approach is acceptable. I understand there are case-by-case factors that affect the applicability of ...
1
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1answer
14 views

Using dependent variable's and exogenous variables' lags as instruments in 2SLS

Suppose we have the following structural equations: $$y=\beta_0+\beta_1x+\beta_2z_z+\beta_3z_3+\epsilon,$$ where $x$ is the endogenous variable and $z_1,z_2$ are exogenous variables. In the literature,...
2
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0answers
29 views

Intuition behind the Endogeneity Test (the Hausman Test)

Suppose we have the following simple regression model (time series framework)" $$y_1=\beta_0+\beta_1 y_2+\beta_2 z_1 +\beta_3 z_2 +u,$$ where $z_1$ and $z_2$ are exogenous and $y_2$ is either ...
4
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2answers
76 views

is endogeneity a problem in the first-stage regression in a two-stage least square regression?

We have this model: $$D=\alpha_1+\gamma_1 Z + \epsilon_1$$ $$Y=\alpha_2+\gamma_2 D + \epsilon_2$$ Notations are as usual: Y is the outcome, D is the treatment, Z is the instrument Two conditions for ...
3
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2answers
145 views

Some confusions about instrumental variable (econometrics)

As the title says, I have some confusions about instrumental variable. According to my lecture note (which is supposed to be reliable), instrumental variable has two big properties: Validity: an ...
1
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1answer
22 views

Why do we treat demographic variables as being exogenous?

I I would like to ask about demographic variables. In general, we usually include those variables as independent variables when we run regressions such as wage equation or test score equation. What ...
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0answers
50 views

The rationale for using a lagged variable to address endogeneity arising from simultaneous causation?

when there is simultaneous causation between dependent and independent variables often in papers we see a lagged variable being used in place of contemporaneous variable. For example, Clemens, ...
2
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0answers
42 views

If an endogenous explanatory variable is serially correlated does it mean that its lags are also endogenous?

in panel data when examining economic growth determinants lags are often used to account for endogeneity of explanatory variables. However if the explanatory variable is serially correlated, does it ...
0
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1answer
76 views

Endogeneity problem with a dummy variable

I have a panel data model as following, $$Y_{it}=intercept +B_1X_{it}+B_2Q_{it}+error_{it}$$ where $i$ is for firm and $t$= time. $Y$= trade credit demand, $X$= inventory cycle, as inventory ...
1
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1answer
48 views

Justification for my Random Effects estimation

I need to defend my use of the Random Effects (RE) estimator in my economics project. I've been told in cross validated that the proper place for the question is here. The causal effect of the ...
2
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1answer
106 views

Can all the regressors be endogenous in a given model?

I'm trying to estimate the following model: Labor demand=f(wages,lagged labor demand, GFCF, GDP, trade share, labor productivity, real exchange rate)... (1) Wages= f(labor demand,lagged wages, GFCF, ...
5
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1answer
1k views

Confounding versus endogenous variables. What is their relative hierarchical position?

There are valuable resources on the lexicon of types of variables quickly accessible, such as here. However, some of these concepts appear side-by-side often enough to make them confusing. For ...
4
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3answers
122 views

Does endogeneity matter when neither independent variable nor error term are correlated with dependent variable?

if the double arrows show that X and the error term are correlated, but that neither variable affects Y, is endogeneity a problem in this scenario? Why or why not?
2
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2answers
469 views

Testing for Endogeneity

I apologize if this question is very basic. I have the following plain vanilla Instrumental Variable model. $Y=\alpha+X\beta+\varepsilon$ $X=\delta+Z\gamma+\eta$ $\varepsilon\perp\eta,\quad Z\perp\...
2
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0answers
61 views

Addressing endogenity in price elasticity and the Promotion Optimization Problem

I have data on purchases gross prices discounts (like coupons) net prices (i.e. gross price - discounts) number of leads (potential customers at any given time) conversion rates (# purchases / # ...
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0answers
400 views

How to test if variables are jointly determined?

If I wanted to test, for example, if consumption growth and credit growth are jointly determined, and therefore justifying the use of instrumental variables, how would I go about this? Would running a ...
2
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1answer
257 views

Count panel models for endogenous regressors

I have a count variable as the dependent variable and several continuous regressors on the RHS. The dependent variable and some regressors are supposed to be endogenous to unobserved factors. I have a ...
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0answers
30 views

Sources of the endogeneity of money in New Keynesian economics (Woodford)

I am trying to wrap my head around Woodford's "Interest and Prices" so I have a question regarding the source of the endogeneity of the money supply in his models. The Post Keynesian view is that ...
5
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1answer
155 views

Selection bias - Will multiple regressions solve the problem?

Now I have a data from an African country concerning (i) levels of corruption across public sectors and (ii) perceptions of service quality from households (bad, medium and high). The data consist two ...