Gjergji Josifi

7 Questions 9 Answers 0 Followers

Questions related from Gjergji Josifi

Do we also assume in a linear mixed effects regression that the unobserved variables shouldn't be correlated with the observed(independent)variables?

In a random effects regression we have the assumption that the individual specific heterogeneity is not correlated with the predictor variables: Yit = 𝛽1Xit,1+ 𝛽2Xit,2+…+ 𝛽kXit,k+ 𝛼𝑖 + 𝑢𝑖t...

15 March 2024 7,403 3 View

Is this a random effects model or a linear mixed effects model?

I am having trouble differentiating between a random effects model and a linear mixed effects model. I am currently using this model...

08 March 2024 5,786 5 View

Does this linear panel regression make sense to examine the effect of an event?

I am using survey panel data and a linear fixed effects model with an event dummy variable to examine the effect of Biden visiting Ukraine on the concern of the US citizens about US getting more...

29 February 2024 2,403 0 View

Does a linear fixed effects panel model make sense with a time trend dummy variable?

I have panel data with two waves, where the same individuals answer in wave 1 and wave 2. In my regression model with individual fixed effects, I want to add a time trend dummy variable that...

16 February 2024 3,954 1 View

Does adding an time trend variable in a fixed effects model make sense?

I'm trying to investigate the effect of a particular event on trust on presidency using survey panel data. I am using a fixed effects model with an event Dummy variable. All survey answers before...

11 February 2024 3,133 9 View

Is this method of combining Likert scale variables accurate?

I have a total of 19 Likert scale variables. I want to see which variables are related to one another (describe one common concept) and combine them together. My method: 1. Perform a factor...

22 December 2023 7,621 8 View

How to combine three Likert scale variables that represent one single concept to one factor to use in panel regression?

So i am doing a panel regression and have 3 Likert scale variables which are correlated and seem to represent one thing namely "Attitude towards immigrants". Now i want to to combine these 3...

21 December 2023 6,315 10 View