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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Panel Data: Add Fixed Effects Before or After Controls?

Hi all, I'm using 51 entities with seven independent variables. Is it typically better to add entity/time fixed effects at the beginning or at the...

• Replies: 0
• Views: 1,349
11-25-2014, 12:27 AM
2. ### Running multple, multiple regressions? which statistical test should i use?

I have done a study on whether personality and demographics predict interaction on facebook brand pages. I have used a Big five personality scale...

• Replies: 5
• Views: 2,300
11-22-2014, 08:18 AM
3. ### Regression analysis with independant variable (error) and multiple dependant variable

So I took a lot of data (~10000) on a machine (3D printer). For each reading, I got the error and a lot of different parameter (speed, voltage,...

• Replies: 26
• Views: 6,523
11-21-2014, 08:24 AM
4. ### Analyse a variable as continuous and as categorical

Hello everybody I performed a univariate analysis of a set of predictors. My plan was to include the significant predictors in a multivariate cox...

• Replies: 3
• Views: 1,900
11-21-2014, 08:14 AM
5. ### Double Regression?

I am looking at two years of financial info by month. I need to project out next month - however, at the end of our one fiscal year there was a...

• Replies: 1
• Views: 1,032
11-20-2014, 03:08 PM
6. ### Mathematical calculation in Access

I have a math problem and I want to ask me pomognete.I working on complex desktop database.My main point is making the application for the simulation...

• Replies: 1
• Views: 1,279
11-18-2014, 05:16 PM
7. ### SVAR parameter standard errors

Hi everyone, How to calculate the standard errors of SVAR parameters. I know how to estimate it for contemporaneous parameter. I want to know how...

• Replies: 2
• Views: 2,986
11-18-2014, 09:27 AM
8. ### Dummy variables (and poster!)

Hi, Could someone please help me understand dummy variables? If I had a variable which was “Religion” that was coded: 1 = Catholic 2 =...

• Replies: 1
• Views: 1,201
11-16-2014, 03:52 PM
9. ### Interaction/Moderation Question

So I know that the terms interaction and moderation are used pretty much interchangeably. However, is it possible for variables to interact without...

• Replies: 4
• Views: 1,926
11-16-2014, 08:42 AM
10. ### Reporting results of non-linear regression with centered variables

Hi I have a regression y = a + b1(x) + b2(x^2) + ...bn + e when i run the regression b1 and b2 are significant (and of opposite sign) but...

• Replies: 3
• Views: 3,581
11-14-2014, 11:12 AM
11. ### Rank-ordered Logistic Regression - assumptions?

Hello dear forum members, The DV in the recently undertaken study is Rank (1-899). I believe, rank-ordered logistic regression is the proper type...

• Replies: 0
• Views: 1,216
11-14-2014, 11:08 AM
12. ### how to find interaction terms in regression modeling

Given a set of predictor variables, are there any ways to test interaction terms? If I test one by one, it will be impossible to do it?

• Replies: 3
• Views: 1,556
11-14-2014, 10:58 AM
13. ### Hotelling's Trace v. Hotelling's T^2- Why make the move?

Hello, I am writing a dissertation and my chair wants me to convert Hotelling's Trace (resulting from my MANOVA) into Hotelling's T^2. No problem...

• Replies: 0
• Views: 2,300
11-14-2014, 07:17 AM
14. ### Avoiding spurious regression in meta-regression using stationary variables like GDP

I have been reading everything I can get my hands on about spurious regression but can't seem to definitively find out what is best in regressing...

• Replies: 0
• Views: 1,631
11-12-2014, 11:10 AM
15. ### Instrumental Variable Regression

Dear All I am writing my master thesis about countervailing power in the HIV medication drug market. For doing so I am conducting the regression:...

• Replies: 1
• Views: 1,431
11-10-2014, 01:07 PM
16. ### Calculating AUC for just one binary variable legitimate?

Dear members of talkstats, I am a junior Radiology resident in France and I have an urgent question about my study. I am checking the capability...

• Replies: 4
• Views: 1,386
11-08-2014, 08:06 AM
17. ### help deciding on best fit regression model

Hi I could do with some assistance for selecting a regression model for my data. The data is for a BSc science study and is analyising the...

• Replies: 0
• Views: 1,013
11-08-2014, 04:56 AM
18. ### Some Conceptual Questions About Quantile Regression

Dear all, I have been teaching myself how to run quantile regression in R using the package called "quantreg." I was able to run these analyses...

• Replies: 1
• Views: 1,551
11-07-2014, 09:35 AM
19. ### Logistic Regression on small sample size/case ratio - SPSS?

Hi all - I have a small issue. I have a categorical dichotomous DV (0,1) with 4 IV's , two of which are categorical and dichotomous (0,1), and the...

• Replies: 2
• Views: 8,762
11-03-2014, 10:04 PM
20. ### Get correlation matrix of 3 variables from any combination of 3 simples/partials

Here is the situation. I am writing a program that does Cool And Interesting Things starting with a correlation matrix among 3 variables: call...

• Replies: 0
• Views: 1,792
10-29-2014, 05:44 PM
21. ### Forecasting with fewer data points

Hi, Can someone provide more insights on how we can achieve forecasting with fewer data points and come up with more accurate models. I have...

• Replies: 4
• Views: 2,380
10-29-2014, 08:46 AM
22. ### Reporting variables into main equation after sqrt or log transformation

Hi Everybody, If I am creating a multiple regression model such as Y = 3 + 1.5apple + 2melon and some of the indipendent variables underwent a...

• Replies: 0
• Views: 1,215
10-23-2014, 05:12 PM
23. ### Analysis of a longitudinal study where interventions are received at different times

I have a data set of university students. The university has 8 different assisting programs, mostly like scholarships, for needy students to help...

• Replies: 2
• Views: 1,542
10-23-2014, 04:56 AM
24. ### Summarizing time series data

Hello, Thank you very much for taking the time to read this! I have many (~70) time series showing the average body size (kg) for the ~50...

• Replies: 5
• Views: 2,887
10-21-2014, 04:18 PM
25. ### Inclusion of a control variable makes a predictor significant

I'm running a logistic regression model. The outcome is political activism (1/0) and the significant predictors (dummy variables) are education,...

• Replies: 3
• Views: 2,368
10-18-2014, 05:41 AM
26. ### How can log link still allow negative predicted values?

I have been attempting to get a meaningful outcome of my data for months, and could really do with some help where to go next. I am attempting to...

• Replies: 0
• Views: 1,578
10-17-2014, 10:50 AM
27. ### Multilevel: Include only two dummies of a 7-1 dummy set into random slope?

I am calculating a two-level linear multilevel analysis. A look at the random intercept random slope model showed me a significant decrease in my...

• Replies: 5
• Views: 2,492
10-16-2014, 01:50 PM
28. ### regression models with mixed types of independent variables

I am working on building a forecasting model, the independent variables are grouped into three types: some variables are continuous; some variables...

• Replies: 6
• Views: 2,568
10-15-2014, 12:45 PM
29. ### Hierarchical Regression Analyses - Testing for a Potential Power Issue

Hi all, My sample consists of 236 participants and I am interesting in investigating the association of several factors with my outcome variable....

• Replies: 1
• Views: 1,286
10-15-2014, 10:38 AM
30. ### Probing of interaction effect with MODPROB (Preacher & Hayes)

Hello everyone, I have a result that I cannot quite understand. I have the following equition Y: Regret X: curiosity M: 2 conditions (0=...

• Replies: 1
• Views: 1,545
10-14-2014, 11:24 AM
31. ### positive loglikelihood?

It seems to be no issue to have positive log likelihood in linear regression. How should I however interpret two positive LLs? In normal situation...

• Replies: 1
• Views: 2,400
10-11-2014, 10:07 AM
32. ### Is poisson regression appropriate?

This is more of a general stats question regarding the best procedure to answer my question of interest. I started to address it using poisson...

• Replies: 0
• Views: 1,496
10-10-2014, 02:22 PM
33. ### Regression with cointegrated time series data

Hello, I am studying a predator-prey relationships using field data collected biannually over 5 years. For example, here is some abundance data: ...

• Replies: 3
• Views: 3,048
10-10-2014, 01:08 PM
34. ### Regression when IV are part of DV

I have a DV that is made up of 7 IV. If you combine the IV you get the DV. I want to know the relative impact of each of the IV on the DV (relative...

• Replies: 7
• Views: 2,080
10-10-2014, 01:02 PM
35. ### Appropriateness of semi-partial correlation squared when there are 10 predictors?

Hi all, I'm conducting multiple regression with a regression model consisting of 10 predictors (4 of which are key study variables, the remainder...

• Replies: 0
• Views: 1,158
10-10-2014, 12:39 AM
36. ### Question about modeling public behavior

I signed-up for this site hoping someone might be able to help me with a question I've been struggling with. I'm currently building a model that...

• Replies: 3
• Views: 1,663
10-09-2014, 02:37 PM
37. ### Help, regression analysis for unbalanced data set

Hi, guys, I need test whether a gene is differentially expressed between two groups, for example, In group 1, we have species A, species B,...

• Replies: 0
• Views: 1,113
10-08-2014, 09:19 PM
38. ### Feedback Questions (Robust)

Dear all, Have recently had some high level feedback on a regression study. "How robust is your empirical results? I would like to see some...

• Replies: 1
• Views: 1,523
10-05-2014, 05:31 AM
39. ### How to reduce variables in multiple linear regression when multicollinearity present?

Good morning, afternoon, evening to everyone. First and foremost, this is my innaugural post so I hope I am following all of the recommended...

• Replies: 6
• Views: 2,459
10-04-2014, 10:47 AM
40. ### Mixed models can variable be both fixed and random

I am conducting an analysis over multiple subjects over several sessions with two types of controls. I want to conduct a mixed model analysis to...

• Replies: 0
• Views: 2,189
10-02-2014, 12:42 PM
41. ### range of tuning parameters

Hi All, I have just started my advanced statistics study. And here is one thing I have not been able to understand for long time -- how can we...

• Replies: 6
• Views: 2,643
10-01-2014, 07:09 PM
42. ### Probability of Predicted Values

As I am still just learning regression and other advanced statistical analysis techniques, I have run into a question that I need help with. My Boss...

• Replies: 2
• Views: 1,616
10-01-2014, 02:08 PM
43. ### Understanding ordinal regression

Hi! This is a really simple question, but one for which the answer continues to elude me! I understand that in a binary logit regression the...

• Replies: 0
• Views: 1,906
10-01-2014, 11:08 AM
44. ### Binary IV and ordinal DV, suggestions for a model?

Hi guys! Just started at a new company having graduated this year, theyve got me analysing data and producing some key driver analytics. Thing is,...

• Replies: 4
• Views: 2,766
10-01-2014, 03:57 AM
45. ### Time series forecasting

Can any one explain how to forecast volatility in stock markets using auto-regressive models like TARCH, EGARCH etc.

• Replies: 0
• Views: 1,364
09-30-2014, 09:22 AM
46. ### Interpreting transformations

Say you transformed an X and Y in a regression model and you find that after the transformations X is signficant. Does this mean that the original X...

• Replies: 2
• Views: 1,392
09-30-2014, 04:37 AM
47. ### whole data vs training/test data

I have time series data of about 150 sample and 8 variables. It is used to generate a interaction network, whose exact structure is not known yet. ...

• Replies: 1
• Views: 1,714
09-30-2014, 04:32 AM
48. ### Compute time to sell (with 50% probability) at Price P from linear regression

I think this is a very basic question (from a total stat newbie). I'm trying to understand a problem I was given (I'm not a statistics student). It's...

• Replies: 0
• Views: 1,145
09-28-2014, 11:30 PM
49. ### Small sample cross-sectional regression: different levels

I have a small sample of about 50 firms, clustered in 20 countries. The main explanatory variables of interest are all firm-specific, as well as...

• Replies: 0
• Views: 1,587
09-27-2014, 09:43 AM
50. ### Linear Regression

• Replies: 4
• Views: 1,849
09-25-2014, 04:28 PM
51. ### Delogging variables

Hey, I have run a multiple regression. DV is change in the log of assets Parameter Expected Sign Parameter (T stat) Chlnx ...

• Replies: 0
• Views: 1,137
09-25-2014, 03:18 AM
52. ### Scaling variables in regression

If you need to scale variables in order to get the correct effect size and beta weight for each variable, does this mean you also scale for both...

• Replies: 3
• Views: 2,675
09-24-2014, 03:30 PM
53. ### Multinomial Logistic Regression

I have run a multinomial logistic regression looking to see if being a member of two different groups predicts group membership to 5 categories. I...

• Replies: 0
• Views: 1,111
mlb
09-24-2014, 05:26 AM
54. ### Pairwise logistic regression - which trait is the dependent trait?

Hi All, Could someone explain the reasoning behind choosing the dependent trait in pairwise logistic regression of two categorical traits. My...

• Replies: 0
• Views: 1,862
09-22-2014, 08:11 PM
55. ### Bivariate with Normal Probability plots.

This is more of a conceptual question for a problem that I'm working on. My professor is asking questions about normal probability plots and I can't...

• Replies: 0
• Views: 1,187
09-22-2014, 04:20 PM
56. ### Regression model advice: 1 continuous DV, 2 binary and 1 continuous IV

Hi- I'm trying to build a model to forecast/predict a continous dependant variable based on several predicting variables. 1 of them is categorical...

• Replies: 0
• Views: 2,103
09-22-2014, 11:22 AM

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