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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Question [stata] interaction terms in conditional logit

    Dear all, There is a famous paper by Norton et al. (2003) which describes why stata's wrong about interaction terms in logit regressions. They...

    Started by Erold‎, 05-07-2014 09:08 AM
    buis, interaction term, logit, norton
    • Replies: 2
    • Views: 3,613
    05-08-2014, 04:23 AM Go to last post
  2. Help with correct wording

    I have an issue with describing the results of a simple analysis in a self-consistent way. This is for a study of an intervention that took place...

    Started by Mechgren‎, 05-08-2014 12:13 AM
    • Replies: 0
    • Views: 2,109
    05-08-2014, 12:13 AM Go to last post
  3. GEE and number of clusters

    What happens to the standard errors of the regression coefficients as the number of clusters increase in GEE? What happens to the estimated standard...

    Started by sealguy‎, 05-07-2014 02:31 PM
    • Replies: 0
    • Views: 1,641
    05-07-2014, 02:31 PM Go to last post
  4. help deciphering - hierarchical regression report

    Hi, I've just started by statistical analysis stage and I've had some strange outputs I was hoping someone could help me with. Two personality...

    Started by estelle12‎, 05-07-2014 12:08 PM
    hierarchical model, hierarchical regression
    • Replies: 1
    • Views: 1,223
    05-07-2014, 01:38 PM Go to last post
  5. Link function for proportional outcome

    I have a data set where the outcome variable is percent passing (ELA and Math tests) for school districts. I will use a 2 level multilevel model...

    Started by trinker‎, 04-18-2014 12:09 PM
    2 Pages
    1 2
    distribution, link, multilevel
    • Replies: 24
    • Views: 4,603
    05-06-2014, 06:39 PM Go to last post
  6. Zero values

    Hello, I need to do regression analysis and have price as an independent variable. The price is zero sometimes. How to handle this kind of data...

    Started by john_f‎, 05-01-2014 10:27 AM
    • Replies: 1
    • Views: 1,652
    05-06-2014, 02:58 AM Go to last post
  7. validity of regression assumptions on residual plot

    I am learning regression course.For a homework given the residual plot I have to analyze it.This is how I interpreted it.I want to know if there are...

    Started by Clarkson‎, 05-06-2014 01:38 AM
    • Replies: 0
    • Views: 1,146
    05-06-2014, 01:38 AM Go to last post
  8. Regression model help

    I need to do regression analysis for my statistics project, problem is that i don't have given dependent and independent variables to analyse, yet I...

    Started by nemanjas23‎, 05-05-2014 10:47 AM
    • Replies: 0
    • Views: 1,447
    05-05-2014, 10:47 AM Go to last post
  9. Characteristics that define simple linear regression?

    Can someone please tell me which three characteristics define simple linear regression? Thank you in advance.

    Started by cfvera‎, 05-01-2014 05:39 PM
    • Replies: 4
    • Views: 2,284
    05-05-2014, 10:44 AM Go to last post
  10. Can anyone help me with a significance problem?

    Hi Everyone, I am running a linear regression for the years 2005 and 2006 for my thesis in which I investigate the relation between having a big...

    Started by Roos‎, 05-02-2014 04:51 PM
    • Replies: 0
    • Views: 1,264
    05-02-2014, 04:51 PM Go to last post
  11. Continuous by contiuous interaction and non-linearity in OLS

    To whom it may concern: I am conducting an OLS for a class assignment and have an interaction between ADHD and non-delinquent peers. I have...

    Started by steph88‎, 05-02-2014 12:56 PM
    continuous variable, interaction, non-linearity, ols
    • Replies: 7
    • Views: 1,744
    05-02-2014, 01:44 PM Go to last post
  12. Question Heteroscedastic variables with linear regression

    Hi, I'm a stat beginner and learning about linear regression. Regarding heteroscedastic variables (i.e. variables with different levels of...

    Started by leejayd‎, 05-02-2014 04:28 AM
    heteroscedasticity
    • Replies: 2
    • Views: 1,455
    05-02-2014, 09:03 AM Go to last post
  13. Regression - I'm Stuck! Feedback PLEASE...Thanks!

    figured it out now.

    Started by skittles‎, 05-02-2014 12:11 AM
    regression, regression analysis, regression coefficent
    • Replies: 0
    • Views: 1,525
    05-02-2014, 12:11 AM Go to last post
  14. Logistic model - numerical vs. categorical covariates & target

    I am using a powerful analytics tool built by Oracle (Data Miner). I am trying to determine the probability of death for a patient given the presence...

    Started by syswizard‎, 05-01-2014 02:44 PM
    logistic covariates
    • Replies: 5
    • Views: 1,908
    05-01-2014, 11:30 PM Go to last post
  15. homoscedasticity violated in more ways than one?

    Hello I need some advice, I am using multiple regressions in SPSS. My data is not entirely normal in its distribution but not bad enough to make me...

    Started by tonyc11‎, 05-01-2014 12:50 PM
    • Replies: 0
    • Views: 1,058
    05-01-2014, 12:50 PM Go to last post
  16. comparing "pooled" coefficients between different models

    Dear all, I am running a mediation model with 6 continuous predictors and 2 mediators, separately for boys and girls. I want to test if the...

    Started by ursula1985‎, 05-01-2014 09:42 AM
    coefficients, comparison, regression
    • Replies: 0
    • Views: 985
    05-01-2014, 09:42 AM Go to last post
  17. Using cointegrated variables in my regression

    Hello. If I have three I(1) variables that I want to include in my AR-model, and I know that they are cointegrated, can I just put them straight...

    Started by TCAC‎, 05-01-2014 09:29 AM
    • Replies: 0
    • Views: 2,068
    05-01-2014, 09:29 AM Go to last post
  18. Question on right model

    Hi I am doing a paper in which I shall try to answer the following question: With fluctuations in the business cycle of the donor country, do...

    Started by robinb2‎, 05-01-2014 07:30 AM
    • Replies: 0
    • Views: 1,076
    05-01-2014, 07:30 AM Go to last post
  19. Mediation with Regression Analysis Need Help some basic Question (Using SPSS)

    I have 3 variables (2 are independent and 1 is dependent). All three variables are measured with questionnaires consisting of multiple questions...

    Started by alizubair‎, 05-01-2014 12:42 AM
    mediation, regression, response
    • Replies: 0
    • Views: 910
    05-01-2014, 12:42 AM Go to last post
  20. Retrieving the right variable in dataset

    Dear users, My database consists of 26 countries with their daily stock returns from 1973, football matches of those countries on World...

    Started by Lucas‎, 04-30-2014 06:26 AM
    • Replies: 0
    • Views: 963
    04-30-2014, 06:26 AM Go to last post
  21. Likert scale data in regression

    It is very common to use likert scale data as a predictor in regression (and not as a dummy variable). They even have a name for this, interval like....

    Started by noetsi‎, 04-29-2014 11:20 AM
    • Replies: 0
    • Views: 1,962
    04-29-2014, 11:20 AM Go to last post
  22. Can I compare regression models with same # predictors and same sample?

    Hi there, As a part of my dissertation I want to compare a focal, new, variable against other well-known predictors of my outcome, so I plan to...

    Started by CWRUgradstudent‎, 04-27-2014 11:32 PM
    model comparison, multicollinearity, regression, steiger's z
    • Replies: 7
    • Views: 1,782
    04-28-2014, 11:49 AM Go to last post
  23. comparing models in logistic regresssion

    Hello, I am planning a stepwise regression (backward or forward, haven't decided yet) of a set of predictors for my reference model to determine...

    Started by noob‎, 04-28-2014 08:52 AM
    • Replies: 1
    • Views: 967
    04-28-2014, 10:52 AM Go to last post
  24. Pooled data

    Hello, I have data on prices of products A, B, C and D for every year over four year period. The price is constant except certain product may be...

    Started by john_f‎, 04-28-2014 08:41 AM
    • Replies: 0
    • Views: 2,204
    04-28-2014, 08:41 AM Go to last post
  25. [ols] what is cov(xbar, bhat)?

    For a linear regression, y(i) = a + b x(i) + e(i), what is cov(xbar, bhat), ie, the covariance between the sample mean of x, xbar, and the ols...

    Started by :-)‎, 04-28-2014 07:51 AM
    covariance, ols, regression
    • Replies: 1
    • Views: 2,149
    04-28-2014, 08:34 AM Go to last post
  26. Please help with weighted # of cases in binary logistic reg

    Hello everybody, I know there is a biomed section which deals with logistic regressions, but my question does not pertain to that field. I have...

    Started by kiton‎, 04-27-2014 08:25 PM
    • Replies: 0
    • Views: 1,038
    04-27-2014, 08:25 PM Go to last post
  27. Estimates from categorical variables

    Hi everyone, I am doing a multiple regression and try to predict which of my categorical variables (4 levels) has can predict my dependent...

    Started by SteveAlbiniBlues‎, 04-27-2014 10:32 AM
    • Replies: 0
    • Views: 1,101
    04-27-2014, 10:32 AM Go to last post
  28. proof of E(EMS)=sigma^2

    How can I prove expected value of error mean square E(EMS)=\sigma^2. I showed that ESS=S_{YY}-\hat\beta_1^2 S_{XX} Thus E(EMS)= E I am...

    Started by Clarkson‎, 04-26-2014 08:26 AM
    anova, regression
    • Replies: 2
    • Views: 1,757
    04-26-2014, 02:16 PM Go to last post
  29. Implications of strict exogeneity in linear regression

    Hi, I've been teaching me regression and have questions about implications of strict exogeneity. These are questions at the end of the chapter...

    Started by washington‎, 01-27-2013 10:51 PM
    regression
    • Replies: 1
    • Views: 2,133
    04-26-2014, 01:58 PM Go to last post
  30. Regression help answering S-plus type question.

    Know any good books?

    Started by Minni04‎, 04-26-2014 12:20 PM
    • Replies: 0
    • Views: 2,008
    04-26-2014, 12:20 PM Go to last post
  31. Which regression model would fit best?

    Hello everyone, A friend and I are trying to examine if changes in political ideology of a government (changes in government in other words) exert...

    Started by Laggerino‎, 04-26-2014 12:19 PM
    • Replies: 0
    • Views: 863
    04-26-2014, 12:19 PM Go to last post
  32. Changing significance level when interactions are added

    Hi, I'm wondering why my significance levels go from significant, to insignificant, and back to significant again when adding interactions? ...

    Started by andreek‎, 04-26-2014 08:17 AM
    • Replies: 1
    • Views: 2,214
    04-26-2014, 11:37 AM Go to last post
  33. cov (yi, yi*)

    solved delete

    Started by vtstat56‎, 04-25-2014 09:59 PM
    covariance, least-squares, regression
    • Replies: 0
    • Views: 2,552
    04-25-2014, 09:59 PM Go to last post
  34. ANCOVA woes

    I'm having real trouble interpreting the output from my ANCOVA. I have two conditions control and experimental, my dependent variable is state...

    Started by ah428‎, 04-25-2014 02:13 PM
    • Replies: 0
    • Views: 1,582
    04-25-2014, 02:13 PM Go to last post
  35. Smile Linear regression after multiple regression

    Please excuse my stupidity - would it make sense to conduct linear regression on the predictor variables remaining after backwards elimination in...

    Started by LucyWillow‎, 04-25-2014 12:53 PM
    correlation, linear regression, multiple regression, regression
    • Replies: 0
    • Views: 1,088
    04-25-2014, 12:53 PM Go to last post
  36. Moved: I urgently need help with this specific regression model

    Started by A_Mans02‎, 04-25-2014 10:33 AM
    • Replies: -
    • Views: -
    04-25-2014, 11:38 AM Go to last post
  37. Logistic regression or ANOVA?

    Im working with a large data set looking at the associations between diabetes and depression with various cognitive outcomes. Specifically, my...

    Started by loops22‎, 04-23-2014 09:59 AM
    • Replies: 5
    • Views: 1,054
    04-25-2014, 07:51 AM Go to last post
  38. Curve Estimation in SPSS

    Hi all, I have 2 variables: time & cost - Time: 0%, 10%, ..., 100% (11 variables) - Cost: 11 variables I want to use 'Curve Estimation' in...

    Started by phehuyet‎, 04-25-2014 01:26 AM
    • Replies: 0
    • Views: 2,752
    04-25-2014, 01:26 AM Go to last post
  39. Estimate the coefficients of an equation system - can I use OLS?

    Hi! I have not worked so much with this type of regressions and have tried to find the answer in my econometric books and on internet, but have...

    Started by Coffeedrinker‎, 04-22-2014 06:05 PM
    econometrics, equation, ols, regression, time series
    • Replies: 4
    • Views: 1,665
    04-24-2014, 04:18 PM Go to last post
  40. [age] discrete variable or continuous variable in linear regression?

    Hi i need some help. I hope you can guide me. I have a survey and i need to predict the variable e18. The issue is i'm not sure how to treat the...

    Started by jfca283‎, 04-24-2014 11:23 AM
    • Replies: 4
    • Views: 3,144
    04-24-2014, 12:51 PM Go to last post
  41. Setting up a model from a multinomial logit regression

    Hello, I've run a study where respondents are presented with a different profiles, and they were asked to indicate which one of several options...

    Started by Injektilo‎, 04-22-2014 05:55 PM
    • Replies: 0
    • Views: 1,152
    04-22-2014, 05:55 PM Go to last post
  42. Combining Seemingly Unrelated Regression Equations (SURE) with First Difference (FD)

    Hey guys, I would like to estimate an equation system of 4 different equations (industry specific) across 20 countries. For various reasons Im...

    Started by MrPii‎, 04-22-2014 03:54 PM
    • Replies: 0
    • Views: 1,093
    04-22-2014, 03:54 PM Go to last post
  43. negative t-statistics

    hi every one, i have run OLS regression for one dependent and two independent variables. the coefficients of both independent variables are positive,...

    Started by ssm‎, 04-22-2014 05:57 AM
    • Replies: 5
    • Views: 2,967
    04-22-2014, 01:37 PM Go to last post
  44. Linear regression help

    hi everyone, I'm new at university and working on this assignment. Basically what I want to determine is the relationship between the percentage...

    Started by phil ma‎, 04-20-2014 06:03 PM
    linear regression
    • Replies: 2
    • Views: 1,424
    04-21-2014, 07:11 AM Go to last post
  45. Regression Analysis based on least square method

    Dear colleagues, I need some help with SPSS. I did an experimental study and found that from dimensional analysis that my dependent variable is...

    Started by Altaf Taqi‎, 04-20-2014 07:07 AM
    • Replies: 0
    • Views: 1,578
    04-20-2014, 07:07 AM Go to last post
  46. ARMA Model Output & Excel

    Dear All, I am using my Eviews Output of an ARMA Model, taking the coefficients in other to perform my Forecasts in Excel. However, I am not being...

    Started by joaom‎, 04-18-2014 12:51 PM
    • Replies: 1
    • Views: 3,264
    04-19-2014, 07:41 AM Go to last post
  47. Help on illustrating the fit of a model

    Hi, I've made a model for real estate price growth in my master's thesis. I want to show how well (or bad) the model fits the data. The problem...

    Started by ladf‎, 04-15-2014 10:39 AM
    • Replies: 0
    • Views: 1,639
    04-15-2014, 10:39 AM Go to last post
  48. Multicollinearity in foraging distance model

    Hi all, I have a model looking at distance travelled ~ body mass + wing area The problem is that wing area is correlated with body mass but...

    Started by killbot2000‎, 04-15-2014 04:56 AM
    • Replies: 2
    • Views: 1,243
    04-15-2014, 10:03 AM Go to last post
  49. Interactions cancel my main effects

    I was looking at the effects of : poverty, political interest, satisfaction with democracy and political trust on political participation through...

    Started by Annvdb‎, 04-15-2014 12:49 AM
    • Replies: 5
    • Views: 1,446
    04-15-2014, 03:13 AM Go to last post
  50. Help with Panel data

    Hi everyone I am doing a research which involve a panel data analysis with dependant variable that take the value of 1-100. This value is a result...

    Started by Sultan‎, 04-14-2014 02:48 PM
    • Replies: 0
    • Views: 1,345
    04-14-2014, 02:48 PM Go to last post
  51. Mediation Analysis with Dichotomous Outcomes - Effect Size for Indirect Effect

    Hello, I would like to run a mediation analysis where my predictor (X) is continuous, my mediator (M) is continuous, but my outcome variable (Y)...

    Started by lespullman‎, 04-14-2014 02:39 PM
    mediation; binary outcome
    • Replies: 0
    • Views: 3,317
    04-14-2014, 02:39 PM Go to last post
  52. Problems with time series model

    Hello. I want to run a pretty simple ADL model, and I have a couple of problems: My model: - Consumption (Ct) as the dependent variable -...

    Started by TCAC‎, 04-08-2014 10:40 AM
    • Replies: 4
    • Views: 1,648
    04-14-2014, 12:01 PM Go to last post
  53. Dispersion parameter

    I have the understanding that the dispersion parameter, \phi, in generalised linear models needs to be known for deviance to meaningful or otherwise...

    Started by Prometheus‎, 04-07-2014 03:13 PM
    dispersion parameter, glm
    • Replies: 7
    • Views: 1,787
    04-14-2014, 07:11 AM Go to last post
  54. Tests for goodness of fit, logistic regression

    What could be for a reason, that Hoshmer and Lemeshow test says that model is good (p-value>0.9), bet Andrews test gives p - value=0 (always)? I have...

    Started by MissEwy‎, 04-14-2014 03:40 AM
    • Replies: 0
    • Views: 1,788
    04-14-2014, 03:40 AM Go to last post
  55. Hypotheses testing if R=1

    Dear all, Since the R value of my regression model is one, I can neither conduct a t-test nor a F-test. Is this a problem with regard to...

    Started by yosi‎, 04-09-2014 06:12 AM
    2 Pages
    1 2
    • Replies: 21
    • Views: 25,427
    04-11-2014, 02:30 PM Go to last post
  56. Covariance

    Hi, I'm studying econometrics and have been utterly swamped by this question. I have a set of statistics in the question. Mean of X, Mean of Y,...

    Started by SecretDuck‎, 04-11-2014 09:19 AM
    • Replies: 0
    • Views: 1,263
    04-11-2014, 09:19 AM Go to last post
  57. coefficient standardization

    Hi All, I am working on a 2nd order regression. The span of coefficient is large (say 1:10000). So the coefficients of 2nd order are very big and...

    Started by bettertony‎, 04-10-2014 04:03 PM
    multiple regression, second order polynomial, standardization
    • Replies: 0
    • Views: 991
    04-10-2014, 04:03 PM Go to last post
  58. Predicting rare events using weight-adjusted logistic regression

    This is a simulation study I adapted from sas website. Suppose my probably follows the following relationship, x=rannor(12342); ...

    Started by CRNZNH‎, 12-08-2012 12:37 AM
    • Replies: 2
    • Views: 4,107
    04-09-2014, 02:26 PM Go to last post
  59. Unhappy How to apply GEE and how to use it for critical mass

    Hi, sorry I am completely new to the forum and as well to using GEE and SPSS so I hope my question is not to confusing. My dependent variable is...

    Started by Angyal-jule‎, 04-09-2014 10:49 AM
    critical mass, gee, independent variable, spss
    • Replies: 0
    • Views: 1,291
    04-09-2014, 10:49 AM Go to last post
  60. Hausman test VS Mundlak model; choosing between fixed-effects and random-effects

    I am using panel data and I have to choose between fixed-effect and random-effect models. I run the Hausman test, the H0 (i.e., the difference in...

    Started by lukeskywalker84‎, 04-09-2014 10:05 AM
    fixed effects model, hausman, mundlak, random effects model
    • Replies: 0
    • Views: 3,314
    04-09-2014, 10:05 AM Go to last post

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