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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Multiple mediation analysis

    I have a question about multiple mediation analysis. I had originally designed a study to see if four separate variables (M1, M2, M3 and M4) mediate...

    Started by B B Jinx‎, 07-20-2015 12:25 PM
    • Replies: 5
    • Views: 1,623
    07-27-2015, 08:32 AM Go to last post
  2. Ordinal predictor variable in regression

    When you have a nominal categorical predictor you just create dummies. With say a five level ordinal predictor (the classical case would be a likert...

    Started by noetsi‎, 07-26-2015 03:11 PM
    • Replies: 1
    • Views: 1,536
    07-26-2015, 05:51 PM Go to last post
  3. Correcting for endogeneity a panel count model with interactions using IV approach

    Hello dear forum members, My study examines the impact of online (a) reputational status, and (b) reviews on physicians’ performance, as proxied...

    Started by kiton‎, 07-25-2015 09:52 AM
    endogeneity, instrumental variables, interaction terms, panel count model
    • Replies: 0
    • Views: 1,401
    07-25-2015, 09:52 AM Go to last post
  4. 1)Test multicollinearity b4/after Stepwise Log Regress? 2)Final Equatn 3)Model Select

    Hi all, I need to perform logistic regression for my study. Pretty new to it but have read up on it and have tried it on SPSS. I would like to...

    Started by atomic_beans‎, 07-20-2015 11:49 PM
    logistic regression, model selection, multicollinearity, spss, stepwise
    • Replies: 8
    • Views: 2,324
    07-25-2015, 06:13 AM Go to last post
  5. Logistic Regression: how can I handle IVs which are correlated?

    Hello, I am planning to fit a Logistic Regression model (binary) and I would like to use (among several IVs) 4 predictors that turn out to suffer of...

    Started by gianmarco‎, 07-24-2015 02:19 AM
    • Replies: 7
    • Views: 1,676
    07-24-2015, 09:26 AM Go to last post
  6. Concerns with using a mix of Continuous and Categorical IVs in Logistic Regression?

    Before I get into it, I want to make clear that I'm not a statistics guy. I'm doing what I can to get through a thesis and stumbling my way forward....

    Started by OkieSpladle‎, 07-22-2015 12:33 PM
    • Replies: 7
    • Views: 1,618
    07-23-2015, 12:30 PM Go to last post
  7. Comparing probability scores from logistic models

    Hi, I want to be able to compare the probability scores from 2 different logistic regression models. I think it is not appropriate to directly...

    Started by msaifk‎, 07-22-2015 11:27 PM
    • Replies: 1
    • Views: 1,365
    07-23-2015, 07:08 AM Go to last post
  8. Linear regression alayses with interaction effect of two categorical variables

    Dear all, I have to run a linear regression analysis in SPSS with an interaction effect of two categorical variables: - Modality (audio,...

    Started by nadinv‎, 07-22-2015 04:12 PM
    • Replies: 3
    • Views: 1,589
    07-23-2015, 04:35 AM Go to last post
  9. Interaction between a time-varying and a time invariant variable? (Panel regression)

    Hi everyone, I have got a question regarding the specification of interaction effects in panel regressions (fixed effects within estimators). I...

    Started by numerator‎, 07-22-2015 07:44 AM
    interaction, moderation, panel, regression, time invariant
    • Replies: 1
    • Views: 2,530
    07-22-2015, 08:26 AM Go to last post
  10. Using residuals as predictors to adjust for effects of covariate in regression

    I was wondering if this is appropriate: I have two predictors that are highly correlated and collinear, x1 and x2, and are both associated with Y....

    Started by Disvengeance‎, 07-21-2015 02:14 PM
    • Replies: 4
    • Views: 2,427
    07-21-2015, 03:50 PM Go to last post
  11. Panel probit model (RE) -- inclusion of time invariant variables

    Hello forum members! Consider a panel probit model to be estimated (say, in Stata code): -xtprobit y x1 x2 x3 x4, re- where, y is binary...

    Started by kiton‎, 07-20-2015 06:07 PM
    • Replies: 0
    • Views: 1,073
    07-20-2015, 06:07 PM Go to last post
  12. Principal Component Analysis - global R2

    Hi, I've extracted the principal components from a set of k studentized variables. I can compute the cumulative R2.i.e the percentage of...

    Started by vm294‎, 07-20-2015 04:53 AM
    • Replies: 1
    • Views: 1,081
    07-20-2015, 10:49 AM Go to last post
  13. Reviewer questioning my regression in my article, need advice on how/what to respond

    Hi guys. Iíve submitted my first article and a reviewer is questioning my stats. I never had this problem before and I need your help! Quick...

    Started by nightale‎, 07-16-2015 03:57 PM
    • Replies: 13
    • Views: 2,000
    07-20-2015, 10:46 AM Go to last post
  14. Selecting Variables in Regression Analysis

    Hello, I am working on generating a regression analysis, but I am not sure if my setup is accurate. I would like to predict how long it will take...

    Started by mjgarrin‎, 07-17-2015 01:57 PM
    • Replies: 3
    • Views: 2,043
    07-20-2015, 07:55 AM Go to last post
  15. (SPSS) Linear Mixed Model?

    Dear all, I would appreciate any advice on the correct use of a Linear Mixed Model (in SPSS) A short description of the research Iím doing: In...

    Started by JdH‎, 07-18-2015 07:27 AM
    • Replies: 0
    • Views: 1,273
    07-18-2015, 07:27 AM Go to last post
  16. Finding Significant Difference between Linear Regressions

    Hello. I have a scatterplot with two different sets of data plotted. Each individual set has its own linear regression formula and R-squared...

    Started by danhageman‎, 07-16-2015 11:31 PM
    outlier detection, p-value, regression analysis, scatter plot, significance
    • Replies: 0
    • Views: 1,120
    07-16-2015, 11:31 PM Go to last post
  17. Exclamation How to use Likert Scale data in regression analysis?

    My knowledge about statistics is elementary and I would really appreciate some help or suggestions in solving my current problem. I am doing a...

    Started by irtiza104‎, 07-14-2015 03:40 PM
    • Replies: 9
    • Views: 3,563
    07-16-2015, 07:57 PM Go to last post
  18. Simple question : Understanding an interaction - Gender as a moderator

    I wanted to see if gender has a moderating effect on the interaction between the age at divorce and trust in relationships. I centered the age at...

    Started by Charlotte_‎, 07-12-2015 04:01 AM
    • Replies: 3
    • Views: 1,526
    07-15-2015, 03:57 PM Go to last post
  19. Preference Share + Regression

    I have conducted a conjoint survey evaluating several combinations of user and devices, with the end goal of calculating a preference share of each...

    Started by Julia18‎, 07-15-2015 02:35 PM
    • Replies: 5
    • Views: 1,793
    07-15-2015, 03:37 PM Go to last post
  20. Simple question - regression, order effects, experiment

    Hi there, I did a simple experiment whereby people in counterbalanced order received a measurement scale measuring their emotions and then...

    Started by Portland‎, 07-08-2015 01:52 PM
    • Replies: 2
    • Views: 2,293
    07-10-2015, 07:42 AM Go to last post
  21. Conducting a White's test in SPSS

    PLEASE anyone?? I'm really struggling here... Hi everyone, I've seen a tutorial on youtube on how to conduct a white's test in spss. I was...

    Started by Charlotte_‎, 07-10-2015 05:02 AM
    • Replies: 1
    • Views: 6,488
    07-10-2015, 05:44 AM Go to last post
  22. How to calculate sum of square of quadratic term

    Hi, I have obtain a quadratic model from central composite design (DOE) During ANOVA procedure I have some solution to compute "manualy" the...

    Started by luc38‎, 07-10-2015 05:03 AM
    anova table
    • Replies: 0
    • Views: 1,546
    07-10-2015, 05:03 AM Go to last post
  23. Creating predicted probabilities from a categorical IV in a logit (with syntax)

    So. I have a binary outcome that is begin predicted by a race IV which has 4 categories. here is my output: LOGISTIC REGRESSION VARIABLES...

    Started by jsayn‎, 07-09-2015 02:24 PM
    • Replies: 2
    • Views: 1,178
    07-09-2015, 06:10 PM Go to last post
  24. predictor 2 on the causal pathway between predictor 1 and outcome

    Hi: This is re-post of a something I put in the 'statistics' forum a while ago. There were 75 views but no responses, so I thought I try again in...

    Started by sigmundo‎, 07-08-2015 07:17 AM
    causal pathways
    • Replies: 5
    • Views: 1,636
    07-09-2015, 10:02 AM Go to last post
  25. Is it alright to use quantity as dependent variable in absence of price information?

    Good afternoon, My panel data set includes information about unit sales, sales volume and other figures but the wholesale/retail price. I'd like...

    Started by RUB‎, 07-09-2015 07:16 AM
    • Replies: 1
    • Views: 1,307
    07-09-2015, 09:49 AM Go to last post
  26. SAS GLIMMIX subject specific estimates

    I am trying to analyze a dataset where each subject has 12 repeated measures (quarterly, over 3 years). I want to extract subject specific estimates...

    Started by aisley‎, 07-08-2015 08:52 AM
    glimmix, longitudinal study, mixed effects model, negative binomial model, sas
    • Replies: 3
    • Views: 1,165
    07-08-2015, 01:41 PM Go to last post
  27. Corporate Governance Explanations effects on Firm Value

    Hi all, I'm quite new to statistics and need some guidance for my dissertation. The University is messing up with my supervisor resulting in me...

    Started by Vislian‎, 06-23-2015 09:54 AM
    • Replies: 1
    • Views: 2,846
    07-08-2015, 08:51 AM Go to last post
  28. Help creating my first logistic Regression model

    Hi everyone, I`m new here, and new in the stats world, and i have several questions and need for help on how to proceed. First, what i`m doing...

    Started by Perdido‎, 07-06-2015 09:29 AM
    • Replies: 8
    • Views: 3,418
    07-06-2015, 03:21 PM Go to last post
  29. Testing heteroscedasticity statistically

    Hi everyone, I conducted a Breush-Pagantest and it is unsignificant, so there is no heteroscedasticity. My residual plot however looks pretty...

    Started by Charlotte_‎, 07-06-2015 03:20 AM
    breush-pagan, white's test
    • Replies: 2
    • Views: 2,169
    07-06-2015, 04:05 AM Go to last post
  30. How to Handle Blank Fields in Multiple Linear Regression

    I am building a regression with 45 samples across 20+ independent variables. I am randomly selecting subsets of the variables and running many...

    Started by Ahmntz‎, 06-29-2015 08:24 AM
    blank fields, least squares regression, missing data, regression, regression analysis
    • Replies: 2
    • Views: 1,460
    07-02-2015, 01:32 PM Go to last post
  31. multivariate regression ?

    Hello everyone, I would like to check whether gross margin% is different in different segments. With segments I mean f.e. quantity, weight,...

    Started by pjlambrecht‎, 06-26-2015 12:40 AM
    • Replies: 3
    • Views: 1,840
    06-30-2015, 07:07 AM Go to last post
  32. Time series regression

    I am trying to learn how to conduct regression with time series data . I intend to use ARDL which is time series with autoregressive error with the...

    Started by noetsi‎, 06-29-2015 03:51 PM
    • Replies: 0
    • Views: 1,210
    06-29-2015, 03:51 PM Go to last post
  33. Determining the weight of variables

    I am trying to determine if one of the numbers in regression summary provide the weight of the important of each variable? Here is an example: ...

    Started by MikeDrohan‎, 06-26-2015 09:10 AM
    regression analysis
    • Replies: 4
    • Views: 1,328
    06-29-2015, 07:06 AM Go to last post
  34. Log

    Dear all, Im am doing an OLS regression. My dependent variable has large negative values, many zeros and large positive values. How can I...

    Started by Joanne Smith‎, 06-28-2015 06:00 AM
    • Replies: 4
    • Views: 1,515
    06-29-2015, 02:45 AM Go to last post
  35. general mediation question

    Hi guys Probably the easiest question ever but I can't really wrap my head around it. The setup of the research is as follow: X and M =...

    Started by Conni20‎, 06-27-2015 09:14 AM
    • Replies: 1
    • Views: 1,439
    06-27-2015, 04:22 PM Go to last post
  36. "Lumping" multiple data sets into one for regression

    Closed - moved sub-forums

    Started by reactant‎, 06-26-2015 01:25 PM
    • Replies: 0
    • Views: 1,768
    06-26-2015, 01:25 PM Go to last post
  37. help with stats

    can someone help explain what this means

    Started by mdnelson‎, 06-26-2015 11:27 AM
    • Replies: 3
    • Views: 1,643
    06-26-2015, 12:44 PM Go to last post
  38. Error term in log-level models?

    I am running a decomposition of log wages for two time periods and want to explain the variance of the error term. My question is: If there is a...

    Started by David@talkstats‎, 06-26-2015 11:18 AM
    anova, heteroskedasticity, log transformation, regression
    • Replies: 0
    • Views: 994
    06-26-2015, 11:18 AM Go to last post
  39. Chi-quare and logistic regression with three level independent variable

    Dear Friends, I am currently working on my master's Dissertation and have some problems in finding out how I should do my chi-square-test and...

    Started by Ricarda_Rau‎, 06-26-2015 07:24 AM
    chi suqrare, control condition, online experiment
    • Replies: 2
    • Views: 1,466
    06-26-2015, 08:56 AM Go to last post
  40. Repeated measure regression

    I have always heard that ANOVA and linear Regression are essentially the same method and that what one would do the other would as well. I am familar...

    Started by noetsi‎, 06-25-2015 02:33 PM
    • Replies: 0
    • Views: 1,185
    06-25-2015, 02:33 PM Go to last post
  41. Interactions in logistic regression - Please help

    Hi everyone, Currently I'm writing my thesis on the effects of divorce on children. It's a complex design so I guess I'll be posting more...

    Started by Charlotte_‎, 06-25-2015 03:08 AM
    dichotomous iv, interaction effects, logistic regression, multicollinearity
    • Replies: 2
    • Views: 1,404
    06-25-2015, 07:50 AM Go to last post
  42. What is the proper name for such kind of regression models - 2-stage or 2-step?

    Dear community experts, I've faced an interesting situation, which is out of my area of expertise, so I need an advice here from someone more...

    Started by DikAlex777‎, 06-24-2015 10:26 AM
    instrumental variables, logit, two-step estimation
    • Replies: 7
    • Views: 1,511
    06-24-2015, 04:21 PM Go to last post
  43. Regression analysis(?) for multiple independent variables

    Hello all, Apologies for posting an elementary query, but my stats is very rusty. Not looking for an explicit solution, necessarily, just a...

    Started by Heywood‎, 06-14-2015 06:53 PM
    estimation, multiple regression, prediction
    • Replies: 2
    • Views: 1,680
    06-24-2015, 11:59 AM Go to last post
  44. Regression analysis on grouped data

    What type of regression model do I use, if I have one dependent variable and five independent variables, but each observation was gathered in groups?...

    Started by kelvarnsen‎, 06-24-2015 10:38 AM
    • Replies: 0
    • Views: 1,044
    06-24-2015, 10:38 AM Go to last post
  45. Question WLS Confidence interval

    Guys can anyone assist? I've googled and read lots on the matter of WLS (mainly lecture notes from asorted university courses google finds)....

    Started by dj_johnphillips‎, 06-23-2015 10:31 AM
    • Replies: 3
    • Views: 2,905
    06-24-2015, 02:09 AM Go to last post
  46. Power analysis for Cox regression...a twist?

    Hello, I am planning prospective trial using secondary data. My sample size is 480. I am using an artificial grouping based on an experimental...

    Started by mirt2013‎, 06-23-2015 09:27 PM
    cox regression and power
    • Replies: 0
    • Views: 1,304
    06-23-2015, 09:27 PM Go to last post
  47. Reverse engineering investment performance correlations to apply to a new investment

    Hello, I've been given some data for the relationship between investor characteristics and investment performance: KPI | Standard coefficient...

    Started by mr e guest‎, 06-23-2015 06:51 AM
    • Replies: 0
    • Views: 1,102
    06-23-2015, 06:51 AM Go to last post
  48. help with non-normality issue!

    Thread has already been solved.

    Started by Conni20‎, 06-23-2015 06:13 AM
    • Replies: 3
    • Views: 1,193
    06-23-2015, 06:37 AM Go to last post
  49. Lightbulb The probability of being born a male baby?

    Thank you! :)

    Started by nmpeony‎, 06-21-2015 10:33 PM
    probability, regression
    • Replies: 2
    • Views: 1,654
    06-22-2015, 08:17 AM Go to last post
  50. Logit regression, marginal effects

    Hi all, I ran a logit regression on the success (1 succesful, 0, unsuccessful) of a Kickstarter Project. I have some difficulties with...

    Started by Piet Voerman‎, 06-21-2015 09:27 AM
    • Replies: 0
    • Views: 1,173
    06-21-2015, 09:27 AM Go to last post
  51. Negative Binomial Regression Coefficient Interpretation

    Hello, the results of my negative binomial regression show me a .03 coefficient. Does it mean when I increase my IV by one unit the DV increases...

    Started by Wald‎, 06-16-2015 05:45 AM
    • Replies: 3
    • Views: 1,795
    06-17-2015, 05:54 AM Go to last post
  52. Mixed model for empty cell design

    Hi everybody, I would like to do a mixed effects regression that is like this: ISI ~ Location + Stage + Stage*Location + 1|Patient/Chan ...

    Started by matthieugold‎, 06-15-2015 03:30 PM
    mixed model, unbalanced data
    • Replies: 0
    • Views: 1,347
    06-15-2015, 03:30 PM Go to last post
  53. hausman test

    Dear community, I analyse purchase decisions on different products j over a duration of t days. I would like to include random or fixed effects. When...

    Started by peter1985‎, 06-12-2015 12:35 PM
    • Replies: 1
    • Views: 1,703
    06-14-2015, 10:12 AM Go to last post
  54. ex post regression analysis

    So I have 500 different store locations 125 locations are from w brand 200 are from xbrand 100 are from y brand 75 are from z brand each...

    Started by statshelp101‎, 06-14-2015 06:16 AM
    regression analysis
    • Replies: 0
    • Views: 1,175
    06-14-2015, 06:16 AM Go to last post
  55. minimum adequate model dropped variables

    Once ive found my final minimum adequate model, what other options could i use to ensure that all of the variables dropped during the...

    Started by lydiasharp‎, 06-14-2015 06:05 AM
    • Replies: 0
    • Views: 2,027
    06-14-2015, 06:05 AM Go to last post
  56. Interaction significant but simple slopes not significant?

    I have run a forum search and an internet search, and tried posting this question on other forums, but have been unable to find an answer to my...

    Started by B B Jinx‎, 06-10-2015 06:01 AM
    interaction, moderation, simple slopes
    • Replies: 2
    • Views: 5,141
    06-10-2015, 09:32 AM Go to last post
  57. Do I need to refer goodness of fit indices when I am only interested in estimates?

    Hello all, I am intersted in the relationship b/w 3 variables (A,B, and C). Then I constructed a path model as A->B->C. My only interest is how big...

    Started by MartenH‎, 06-04-2015 01:44 PM
    • Replies: 8
    • Views: 2,209
    06-09-2015, 11:38 AM Go to last post
  58. Panel model with FE minimum number of observations per group

    Hello dear forum members, I am estimating a panel model with fixed effects using yearly data from 2009 to 2013 (N=1848). Whereas 80% of the data...

    Started by kiton‎, 06-07-2015 03:06 PM
    • Replies: 3
    • Views: 2,122
    06-08-2015, 12:53 PM Go to last post
  59. Question Null hypothesis at the 5% level of significance

    H0: β1 = β2 = β3 = 0 H1: At least one of the equalities does not hold If I have gotten the answer 5.518 from the formula F k, n- (k +1) = (RSS/...

    Started by Viv0202‎, 06-07-2015 01:47 PM
    • Replies: 1
    • Views: 2,281
    06-07-2015, 02:42 PM Go to last post
  60. Help

    Hi Everyone, Is a sample of 20 companies too small for a dividend payout study? in SPSS I get a negative Adjusted R sq you will find attached...

    Started by c_b_s90‎, 05-22-2015 08:14 PM
    • Replies: 1
    • Views: 1,383
    06-07-2015, 01:51 PM Go to last post

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