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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Moved: Long format for OLS?

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05-23-2012, 12:50 PM
2. ### Moved: I urgently need help with this specific regression model

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04-25-2014, 11:38 AM
3. ### Moved: single observation multi-year variables

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02-13-2011, 10:10 AM
4. ### Moved: How to Interpret the Factor Analysis Findings

Kindly help writing research findings for the Factor Analysis as attached

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07-24-2016, 12:37 PM
5. ### Hierarchical Linear Modeling (HLM) Explanation

I sought help actually doing an HLM a few weeks ago and found the assistance very helpful. Now, I'm curious about more of the actual meaning of...

• Replies: 1
• Views: 83
10-09-2017, 09:07 AM
6. ### Simple Regression

The manager of Colonial Furniture has been reviewing weekly advertising expenditures. During the past 6 months, all advertisements for the store...

• Replies: 0
• Views: 96
10-10-2017, 01:32 PM
7. ### two sided multivariate

Hi, I have a question, what will I do with this? In univariate analysis, if the population standard deviation σ is known, the appropriate...

• Replies: 0
• Views: 111
09-19-2017, 03:25 AM
8. ### Residual Modelling and Generating Scenarios for variables

newbie here with a trivial question. i am trying to create scenarios on a set of macro variables. i started with creating a bayesian VAR model on...

• Replies: 0
• Views: 121
09-20-2017, 09:33 PM
9. ### Fixed effects / clustered standard error in multi-level data

Hi everyone :) I'm analyzing the effect of political corruption on the bid-ask spread of US political entities, namely my data set consists of...

• Replies: 0
• Views: 122
09-25-2017, 08:22 AM
10. ### Spend against views/day. Include days of no spend?

Hi everyone, just looking at doing some simple linear regression and I've got views on an article. Occasionally we choose to spend a bit of money...

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• Views: 137
09-20-2017, 11:41 PM
11. ### Estimating impact of Predictor

Hi, I have a simple regression with 24-36 months of data, let's say of Sales which is the dependant variable and % spend on promotions in that...

• Replies: 3
• Views: 137
09-22-2017, 08:59 AM
12. ### Repeated Measures - moderation / two outcomes issue

Hey folks! By what procedure can I test whether the association between two dependent variables D1 and D2 changes as a function of within-subject...

• Replies: 0
• Views: 149
09-13-2017, 12:03 PM
13. ### Multiple linear regression in cross-country analysis with small sample size

Hello, While conducting small student’s research project I’ve faced a little problem. I’m using aggregated country data (not in individual, but...

• Replies: 0
• Views: 174
10-01-2017, 07:10 AM
14. ### Stationarity and White noise

Hi all, I'm just beginning to learn about time series analysis for my final year project at uni and I am confused about stationarity. A time series...

• Replies: 4
• Views: 205
10-03-2017, 04:53 AM
15. ### Determine Confounding using Multivariate analysis

After we adjusted for confounders in the Multivariate analysis, How do we determine that if the variable is confounding or not? I read somewhere...

• Replies: 1
• Views: 206
08-11-2017, 02:04 PM
16. ### Power analysis for time series regression

Hello, I'm trying to determine the sample size I need for a study. In the analysis, I will be including three predictors (score on a questionnaire,...

• Replies: 1
• Views: 207
09-08-2017, 04:50 AM
17. ### matrix iv and dv

hi all The independent variable i got is a 52x16 matrix The dependent variable i got is also a 52x16 martix (This is one variable) what kind...

• Replies: 0
• Views: 222
08-01-2017, 03:22 AM
18. ### Looking for references on Passing-Bablok curve fitting.

Hi, I am computer programmer and I need to implement the Passing-Bablok method in one application I have. Yet, I am a little stuck since I don't...

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• Views: 223
07-28-2017, 06:33 PM
19. ### Hierarchical Linear Modeling (HLM) Assistance

Sorry if this gets posted twice (it doesn't look like it has posted the first time as of now). I asked a question about fixed vs. random effects...

• Replies: 4
• Views: 233
09-28-2017, 04:40 AM
20. ### high correlation among interaction terms

Y= alpha+ b1*x1 + b2*x2 + b3* x3 +b4*x4 + b5*dummy1*x1+b6*dummy1*x2 + b7*dummy1*x3 +b8*dummy1*x4 I run the correlation between all the regression...

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• Views: 239
08-10-2017, 06:11 AM
21. ### Odds ratios for multilevel categorical variable

Hi, I have a categorical variable with three levels that represent disease severity (0=no disesase, 1=mild, 2=severe disease) and I have put it...

• Replies: 3
• Views: 252
08-04-2017, 01:31 PM
22. ### Question on Impact of Independent Variable Interpretation

Hi, Suppose i have a normal linear regression construct, like Sales = Intercept + M1*X1 + M2*X2 + M3*X3 Suppose X1,X2,X3 are the...

• Replies: 3
• Views: 254
09-01-2017, 03:30 PM
23. ### Correlation among a paired multiple vairable for a special case

Hi all, I've run into a stats problem that I can't figure out. I have a pair of linked variables (x,y) that I want to correlate with a third...

• Replies: 1
• Views: 255
08-07-2017, 06:41 PM
24. ### IV regression help

Hello everyone, Im confused about endogeneity and how to approach this problem in a case of one equation and multiple equations that are jointly...

• Replies: 3
• Views: 255
10-11-2017, 11:39 AM
25. ### Calibration set for PLS regression

Hello everyone, New to this forum and kind of wondering why I hadn't thought to search for one before tonight... I hope a light at the end of the...

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• Views: 259
07-20-2017, 06:40 AM
26. ### Easy Bayesian Statistics

Well the thread title was to get your attention. About a month ago I attended a workshop on Bayesian statistics. It introduced the basic principles...

• Replies: 1
• Views: 278
07-31-2017, 08:49 AM
27. ### How do I run a moderator analysis within zero-inflated negative binomial(ZINB) reg?

How do I run a moderator analysis within zero-inflated negative binomial(ZINB) regression? I do have independent variables (Social Network...

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• Views: 285
07-01-2017, 11:22 PM
28. ### [Linear Regression] Regression with aggregated or separated years?

Hello to everyone! :wave: I should do some regressions but i've an important and simple question... my dataset have this structure: ...

• Replies: 4
• Views: 304
08-25-2017, 12:00 PM
29. ### Interaction effects regression wiith dummy variables

Hello everyone, I am doing an analysis about the export diversification effect during the financial crisis. I have my dependent variable as log...

• Replies: 5
• Views: 320
08-25-2017, 09:19 AM
30. ### Compare regression coefficients of two settings with similar samples

Dear Statisticians, For my thesis I am currently examining whether the accounting principles have an influence on the relation between having a...

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• Views: 330
06-09-2017, 03:32 AM
31. ### Firth regression and AIC-based model selection

Dear all, when using Firth's bias reduction method (Firth 1993) to fit logistic regressions, is it possible (sensible) to compare models using AIC? ...

• Replies: 4
• Views: 341
09-01-2017, 03:41 PM
32. ### Negative Binomial Regression and Type I Errors

Hi, I've completed three test of negative binomial regression. One test had 14 independent variables, and the other two had 7 independent...

• Replies: 2
• Views: 347
07-21-2017, 03:05 AM
33. ### Fixed vs. Random Effects

I'm wondering if someone could help me to correctly identify whether certain variables should be considered fixed or random effects. Just as...

• Replies: 6
• Views: 354
08-29-2017, 04:43 AM
34. ### Coefficient sign varys over the distribution of the dependent variable

Hi, Lets say I am estimating a linear regression with Y as a continuous DV and X as a binary IV. Based on theoretical reasons I am assuming that...

• Replies: 1
• Views: 364
07-21-2017, 11:16 AM
35. ### Using a dummy variable to model threshold effects

Hi All, I'm new to this thread and very green/inexperienced in using regressions. I'm trying to model threshold effects in a time series analysis -...

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• Views: 370
06-26-2017, 08:28 AM
36. ### Comparing effect sizes of two longitudinal linear relationships

Is there a way to determine if one longitudinal linear relationship is significantly stronger than another? I was planning on using regression...

• Replies: 2
• Views: 373
06-08-2017, 10:16 PM
37. ### HLM - non-linear IV and placement of individual characteristics in the model

Hi all! I am working on my dissertation and run across a couple of questions when structuring HLM model. The data looks as follows: I conducted an...

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• Views: 376
06-22-2017, 05:04 PM
38. ### External validation of a log reg model using Nagelkerkes R2 w/ fixed parameters

I have a dataset containing a point score (an integer between 0-41) and mortality (0/1) for a sample. I have performed a logistic regression...

• Replies: 0
• Views: 382
03-30-2017, 08:05 AM
39. ### Reporting Dummy Variables and Determining Significance

Hi all, I was just wondering, how does a person determine the significance of a categorical variable in a hierarchical regression model if one...

• Replies: 1
• Views: 394
06-27-2017, 12:46 PM
40. ### combining error terms for two dissimilar regressions

I have a linear regression for Y on X, and a power regression for Z on Y, each having associated error. (the Y values are different (independent) in...

• Replies: 13
• Views: 425
09-25-2017, 02:36 PM
41. ### Modeling portfolio using multiple regressions

Hi All, I'm wondering about the viability of this task. I'm looking to form something similar to an investment portfolio, which aggregates...

• Replies: 2
• Views: 429
07-21-2017, 07:21 AM
42. ### Binary LR-Forward Stepwise: Should I report the each step entered in the result?

Dear all, I used binary logistic regression in a forward stepwise method to classify my two groups of participants (depressed vs. healthy) using...

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• Views: 441
04-19-2017, 07:51 AM
43. ### OLS vs solving a system of linear equaions

If i want to solve y=Xb, where y is a vector of observations and X a matrix of independent variables i could use ordinary least squares to estimate...

• Replies: 11
• Views: 452
09-20-2017, 08:06 AM
44. ### Analysis of multiple dependent variables of different sample sizes

Thanks in advance for your help, I'm not a statistician, so I'm struggling to understand the best way to analyse some biological data, and I...

• Replies: 0
• Views: 460
04-19-2017, 09:32 AM
45. ### How to handle dummy variable with fraction as possible values

Hello , I am working on a data with a dummy variable values not just 0 or 1. It has fractions as values which denote the number of month within a...

• Replies: 5
• Views: 478
08-13-2017, 05:27 AM
46. ### Regression against the mean

Hi, the data behaves in a certain way. It has the tendency to regress to the mean as well as is correlated to another factor Y. Is it correct to do a...

• Replies: 1
• Views: 482
07-07-2017, 01:42 AM
47. ### How to do a linear multiple regression with multiple correlating independent vars?

Right I am a total newb at stats but I'll try an explain what I'm trying to do. Im trying to find whether China's Foreign Direct Investment...

• Replies: 0
• Views: 492
04-26-2017, 06:10 AM
48. ### A question regarding simultaneous relationship and its implications on predictions

Hey guys, I have a question regarding The simultaneous relationships and the Implications it has on regarding whether the said variable will be...

• Replies: 0
• Views: 496
04-14-2017, 08:22 AM
49. ### Panel study, multiple linear regression, assumptions

Hey. I am doing a project where I am studying a set of companies over a 7-year period. I am doing a multiple linear regression analysis either...

• Replies: 0
• Views: 498
03-21-2017, 05:54 AM
50. ### Panel data regression estimatetion method

Hi, I am facing some problems with a panel dataset, and I hope somebody could help me. I have a pretty large data set (approx. 5000 firms, 15...

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• Views: 520
04-09-2017, 05:53 AM
51. ### Interaction / Moderation effect linear regression

Hi, I have a question regarding a moderation effect with linear regression. I have hypothesized for a significant main effect and another...

• Replies: 6
• Views: 524
08-12-2017, 11:34 AM
52. ### Cant do a linear regression on a subset of my data: Error

I installed the R package AER, from which you get the data `PSID1982`. Then I define this model: data("PSID1982") set.seed(15606) ...

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• Views: 526
01-17-2016, 11:53 AM
53. ### Fixed effects model urgent help

So I have a dataset which I am trying to use the fixed effects model on. I am confused if I am doing it correctly. I am using panel data to...

• Replies: 0
• Views: 526
04-18-2017, 11:02 PM

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