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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Help with Regression Analysis problem and time delay

    Good morning all! I am presently working on a paper, and am grappling with a statistical problem that is outside of my area of expertise (I am...

    Started by caltech27‎, 07-08-2012 11:09 AM
    • Replies: 3
    • Views: 2,467
    07-13-2012, 04:45 AM Go to last post
  2. Combining panel (10 years of data) and survey data (1 year) in one regression

    Quick question regarding a problem I am having: My research explores determinants of municipal recycling behavior, evaluating the effects of...

    Started by caltech27‎, 02-07-2013 01:23 PM
    • Replies: 0
    • Views: 2,485
    02-07-2013, 01:23 PM Go to last post
  3. Dynamic panels

    Did someone have done a serious work/report on dynamic panel with stata or Eviews? Ibegin in this field for my PHD.Please email...

    Started by canfly‎, 02-15-2017 05:58 PM
    • Replies: 0
    • Views: 1,893
    02-15-2017, 05:58 PM Go to last post
  4. Want to regress (statistically), but can it be done?

    I have population size over time with many gaps (the unfortunate reality of many biological data sets!): there are only 12 points over 37 years. ...

    Started by canis11‎, 06-29-2010 10:05 AM
    • Replies: 2
    • Views: 2,479
    06-29-2010, 01:43 PM Go to last post
  5. Common Factor Restrictions

    Hello, I am currently writing my Master-Thesis and got a problem, which I have been trying to solve for the last three days. I have to conduct a...

    Started by Canu‎, 10-02-2012 03:19 AM
    • Replies: 0
    • Views: 2,428
    10-02-2012, 03:19 AM Go to last post
  6. Exclamation HELP: Generate a new dummy variable

    Hey folks, for my master thesis and my logit regression I need to create a dummy variable, but this one is a bit more complex than just a simple...

    Started by canut‎, 01-26-2014 12:40 PM
    • Replies: 2
    • Views: 1,238
    01-26-2014, 02:37 PM Go to last post
  7. Multiple logistic Regression Power Analysis

    Hi to everybody, Please does anybody can help me to solve this problem? I have a multiple logistic regression model with more than one BINARY...

    Started by Canyon75‎, 12-20-2008 08:05 AM
    • Replies: 1
    • Views: 4,863
    12-22-2008, 09:04 AM Go to last post
  8. reporting descriptive Stats when using gender in multiple regression.

    Hi, I am relatively new to research methods and using SPSS. I wanted to perform multiple regression analysis using categorical and continuous...

    Started by caoimhe‎, 07-18-2012 05:50 PM
    • Replies: 6
    • Views: 4,333
    07-19-2012, 02:39 PM Go to last post
  9. SPSS- Binary Logisitc Regression- what to do when there are few significant variables

    Hi, I am looking at the factors associated with successful smoking cessation. I have two groups (smokers and ex-smokers) so I am using binary...

    Started by caoimhe‎, 09-07-2013 07:48 AM
    • Replies: 0
    • Views: 1,370
    09-07-2013, 07:48 AM Go to last post
  10. Modelling problem

    Hi there! I have this modelling problem, and I'd like to get some input/ideas. My data are produced power and measured wind speed at a wind...

    Started by caoshaug‎, 02-07-2012 06:20 AM
    • Replies: 13
    • Views: 2,636
    02-13-2012, 09:50 AM Go to last post
  11. Paired t-test - Inferring causality between two variables (before/after)

    Hi, Suppose I have the following data measuring Gene expression (how active the gene is) and blood value (for example Very Low Density...

    Started by capocrimini‎, 11-19-2013 06:23 AM
    • Replies: 0
    • Views: 1,652
    11-19-2013, 06:23 AM Go to last post
  12. Non linear regression and under-/overvaluation calc.

    As you know the Security Market Line is used to find under- or overvalued securities (if they plot below or above the SML). I am doing something...

    Started by Capslock‎, 07-04-2010 11:31 PM
    • Replies: 0
    • Views: 1,536
    07-04-2010, 11:31 PM Go to last post
  13. Appropriate logistic regression model to control for confounders?

    I am working with a cross-sectional study sample (N=601). The goal of my research is to investigate if there is an association between a disease (X)...

    Started by CarlAH‎, 02-18-2011 04:26 PM
    • Replies: 2
    • Views: 9,811
    02-18-2011, 05:20 PM Go to last post
  14. Instrumental variable apporach: two stage least squares

    Hello everyone, I want to test cross sectional data with a household survey with 60k plus of respondents (however missing data result in overall...

    Started by Carlos_1‎, 01-11-2016 03:38 PM
    • Replies: 1
    • Views: 1,526
    01-11-2016, 08:05 PM Go to last post
  15. Effect size+power calculations for spotlight analyses

    EDIT: I mistakenly typed "spotlight" when I really meant "floodlight". Corrected for that. I have a question about calculating effects sizes and...

    Started by carlsonturner‎, 06-28-2016 09:45 AM
    • Replies: 2
    • Views: 1,060
    06-28-2016, 01:45 PM Go to last post
  16. Autocorrelation/Regression

    Post deleted

    Started by Carlyn‎, 10-29-2011 09:06 AM
    • Replies: 4
    • Views: 3,006
    10-29-2011, 09:58 AM Go to last post
  17. Dynamic Regression

    Can we determine dominant factors using dynamic regression model?

    Started by Carlyn‎, 10-29-2011 10:36 PM
    • Replies: 0
    • Views: 1,532
    10-29-2011, 10:36 PM Go to last post
  18. IV results interpretation

    Hello, I have an endougenous variable x and an instrument for it, variable z. The instrument is (significantly) negatively related to x. My...

    Started by carmen256‎, 01-17-2012 07:24 AM
    instrumental variables, interpretation, output
    • Replies: 0
    • Views: 2,279
    01-17-2012, 07:24 AM Go to last post
  19. IV probit and Ivreg

    Hello, When I use ivreg in Stata and cluster standard errors my results show that the independent variable is significant. However, when I use...

    Started by carmen256‎, 01-23-2012 02:31 PM
    probit, regression analysis, results
    • Replies: 0
    • Views: 4,018
    01-23-2012, 02:31 PM Go to last post
  20. Beta of 0 and p-value of 1

    Hello, I am estimating a 2 stages least squares model. My first stage is fine ( strong instrument) but my second stage gives my coëfficiënt in...

    Started by carmen256‎, 09-10-2013 06:22 AM
    beta 0; p-value 1
    • Replies: 3
    • Views: 2,794
    09-10-2013, 02:08 PM Go to last post
  21. How can I find the values of B0, B1, B2 for MLRM?

    Hi guys, can anyone please help me out on this one? I have to find the values of β1,β2 and β3 for a MLRM - Multiple Linear Regression Method. ...

    Started by carmeron3‎, 01-08-2013 08:17 AM
    • Replies: 2
    • Views: 2,134
    01-08-2013, 10:39 AM Go to last post
  22. Grouping response in logistic regression

    Hi, I'm new to statistics and hope to find some help here. I can't find any information on why in logistic regression a binary response is often...

    Started by caro‎, 02-17-2012 08:03 AM
    • Replies: 2
    • Views: 1,981
    02-17-2012, 11:10 AM Go to last post
  23. Help! model comparison in logistic regression

    Dear all, I'm working on a logistic regression and have now obtained two competing models (one computed by hand, the other with "step" in R). In...

    Started by caro‎, 03-15-2012 06:31 AM
    • Replies: 3
    • Views: 3,090
    03-16-2012, 03:17 AM Go to last post
  24. Dummy regression for graded paired comparison

    Hi all, I'm trying to create a dummy regression for a conjoint analysis with graded paired comparison. here is an example of one paired...

    Started by caro23‎, 08-27-2010 03:09 AM
    • Replies: 0
    • Views: 2,784
    08-27-2010, 03:09 AM Go to last post
  25. Standard Error Correction in Two-Stage Estimation

    There have been many papers on error corrections for two-stage estimation, such as Murphy-Topel (85). The basic model proceeds as follows: Stage 1:...

    Started by CarpenterT‎, 11-30-2013 11:18 PM
    error correction, murphy-topel, two-stage ols
    • Replies: 0
    • Views: 2,670
    11-30-2013, 11:18 PM Go to last post
  26. Attempting the Impossible? Please help!

    I've been tasked with conducting a statistical analysis and have encountered a few potentially significant problems. As its been quite some time...

    Started by carriedinterest‎, 07-07-2009 08:21 AM
    • Replies: 0
    • Views: 2,400
    07-07-2009, 08:21 AM Go to last post
  27. Multiple linear regression: square root transformation of predictor variable

    I have used a square root transformation to successfully correct the positive skew of a predictor variable in a hierarchical multiple linear...

    Started by carswa‎, 05-25-2016 03:38 PM
    • Replies: 0
    • Views: 1,742
    05-25-2016, 03:38 PM Go to last post
  28. How to find Significant difference in R2

    Hi My study requires comparing the regression square got from accounting policy 1 and from accounting policy 2. Same set of samples are used in...

    Started by CAShobana‎, 04-02-2015 02:23 AM
    • Replies: 0
    • Views: 1,672
    04-02-2015, 02:23 AM Go to last post
  29. Penalty Analysis

    Hi, how do we interpret the result of penalty analysis having negative mean drop (which is sig) as well as negative penalties (which is also sig)....

    Started by cassandra010666‎, 07-13-2011 08:46 PM
    • Replies: 1
    • Views: 6,885
    07-13-2011, 09:16 PM Go to last post
  30. Algebraic Definition of Residuals from a Regression

    I just need a hint on how to get started on this. Any advice? Define the residual from a regression (one independent variable) algebraically and...

    Started by cassetete‎, 03-01-2011 09:07 AM
    regression analysis
    • Replies: 1
    • Views: 3,187
    03-02-2011, 01:31 PM Go to last post
  31. Hierarchical Regression for Undergraduate Thesis

    Hi, I am working on an undergraduate thesis testing the effectiveness of incentives in the workplace. My director told me that I had to run a...

    Started by Catalyst48‎, 04-01-2013 07:18 PM
    • Replies: 6
    • Views: 3,338
    04-08-2013, 04:53 PM Go to last post
  32. comparing regression coefficients between different models to see if they are similar

    Hi all; This is a very elementary problem; but unfortunately, my strengths do not like in statistics: I am trying to describe plant growth over...

    Started by catbelize‎, 08-22-2013 03:47 AM
    coefficients, polynomial regression, standard error
    • Replies: 8
    • Views: 1,437
    08-23-2013, 09:23 AM Go to last post
  33. assumption of linearity in the logit and transformation of continuous IV

    Hello, I am doing logistic regression in spss for my phd research. Testing the assumption of the linearity in the logit I included in the analysis...

    Started by Catherina‎, 05-11-2011 04:28 AM
    • Replies: 0
    • Views: 3,763
    05-11-2011, 04:28 AM Go to last post
  34. 10 fold cross-validation

    I am looking at how good an experimental measures is to classify control group from a clinical group. I was asked to do 10-fold cross validation....

    Started by Cathy Carter‎, 12-09-2014 03:14 PM
    • Replies: 0
    • Views: 1,981
    12-09-2014, 03:14 PM Go to last post
  35. Predictions of new data based on an existing model

    Could someone help how to use an existing model (in this case it is model derived from discriminant analysis) to predict a new data set.

    Started by Cathy Carter‎, 12-10-2014 10:54 PM
    • Replies: 0
    • Views: 1,286
    12-10-2014, 10:54 PM Go to last post
  36. Question Controlling for time

    Hello, Thank-you for taking the time to read this post. I have managed to get myself very confused about what is (hopefully) quite a simple...

    Started by CathyK‎, 10-16-2017 08:15 AM
    control variable, logistic regression
    • Replies: 0
    • Views: 37
    10-16-2017, 08:15 AM Go to last post
  37. Post SPSS regression:Does this new variables add to the model fit?

    PLEASE HELP ME THOSE QUESTIONS: SPSS output from a set of three regressions estimated using the auto data we explored in the tutorials. Use the...

    Started by catoon2b‎, 03-21-2014 02:51 PM
    • Replies: 1
    • Views: 1,733
    03-21-2014, 03:21 PM Go to last post
  38. Not Quite Quadratic Regression

    Hello all, I predict an u-shaped relation between two variables, y and x. If I perform a quadratic linear regression, i.e. use a model like ...

    Started by cause‎, 08-03-2012 09:00 PM
    fractional polynomials, non-linearity, polynomial regression, quadratic regression
    • Replies: 5
    • Views: 2,346
    08-04-2012, 07:46 AM Go to last post
  39. How to choose the best predictors when b and beta indicate different predictors.

    Hey everyone, for my thesis I'm investigating the relationship that can exist between the emotion of boredom and interest through the analysis of...

    Started by CĂ©line Stas‎, 07-17-2011 08:33 AM
    • Replies: 1
    • Views: 2,358
    07-17-2011, 10:52 AM Go to last post
  40. Question Comparing betas between two separate models

    I have a linear regression model and results for 2001, and 2008. A particular predictor (unemployment rate) is significant in both models (p=0.000)....

    Started by cbaldwin‎, 06-06-2012 11:24 PM
    • Replies: 1
    • Views: 1,560
    06-10-2012, 04:33 AM Go to last post
  41. Passing-Pablok Regression for clinical unlike method validation

    Will anyone take a look at this model and help interpret it for me. (Attachment) I need to show analyte correlation between two different...

    Started by cboggs‎, 01-11-2012 03:05 PM
    • Replies: 0
    • Views: 2,509
    01-11-2012, 03:05 PM Go to last post
  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...

    Started by ccooper‎, 10-01-2014 07:51 AM
    gbm, prediction interval, prediction limits
    • Replies: 2
    • Views: 1,614
    10-01-2014, 02:08 PM Go to last post
  43. 1way anova to do multiple comparisons on dichotomous dv

    Greetings! I wanted to quickly reference with someone who may know more about logistic type analyses. I am doing an analysis of a very large...

    Started by cdo‎, 05-18-2010 05:25 PM
    • Replies: 0
    • Views: 3,110
    05-18-2010, 05:25 PM Go to last post
  44. Repeated Measures model with Covariates

    Hi Everyone, i am struggling with finding a good way to analyze a dataset. The design is this: I have 25(n) subjects, all of them are tested in an...

    Started by cecilia‎, 12-15-2016 04:49 AM
    categorical, covariate, model, multiple regression, repeated measures
    • Replies: 1
    • Views: 2,908
    12-16-2016, 02:23 AM Go to last post
  45. Now sure what to do now (4 variables, no interaction, significant correlated)

    Hello everybody - I am in need of some statistical help as I'm a bit confused as to what to do next. I'll give you a rundown of my situation: I've...

    Started by CedricFP‎, 04-09-2010 06:56 AM
    • Replies: 7
    • Views: 5,376
    04-22-2010, 11:26 AM Go to last post
  46. Can I use multivariate analysis without univariate analysis?

    Dear all, I have a problem in my data analysis and paper writing. Some variables (dependents) were not statistically significantly correlated...

    Started by celinetang‎, 04-02-2013 05:39 AM
    • Replies: 14
    • Views: 23,527
    01-26-2016, 11:08 AM Go to last post
  47. Estimating Confidence Intevals

    Hi, I have used a loglikelihood function to estimate 24 parameters. How do I construct a confidence interval given the Hessian (avaliated on the...

    Started by celiofeltrinjr‎, 01-15-2014 01:40 PM
    confidence interval, maximum likelihood
    • Replies: 2
    • Views: 1,321
    01-15-2014, 11:50 PM Go to last post
  48. Moderation, GLM, and interactions. Discrepent results...

    Hello all, I'm running a GLM to test for moderation. One of my interaction terms (the product of two continuous variables) looks suspicious......

    Started by cellardoor.‎, 03-06-2012 07:04 PM
    • Replies: 0
    • Views: 2,511
    03-06-2012, 07:04 PM Go to last post
  49. Lagged independent variable (Stata)

    Hello, I'm currently working with a company dataset in the form of an unbalanced panel (overall sample size: 1.300 company years, T: 10, X: ~170...

    Started by Cemon‎, 04-23-2013 03:55 AM
    logistic regression, stata
    • Replies: 0
    • Views: 4,486
    04-23-2013, 03:55 AM Go to last post
  50. Cluster-robust standard errors needed in random effects model?

    Hello, I'm currently working with a company dataset in the form of an unbalanced panel (overall sample size: 1.300 company years, T: 10, X: ~170...

    Started by Cemon‎, 04-23-2013 04:43 AM
    • Replies: 0
    • Views: 3,959
    04-23-2013, 04:43 AM Go to last post
  51. 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: 2,257
    05-05-2014, 10:44 AM Go to last post
  52. ANCOVA - can I delete a very significant variable from a model's equation?

    Hi all, I undertook a sensitivity analysis to study the contribution of explanatory variables to soil organic carbon variations. Here, the...

    Started by CGG‎, 11-22-2015 05:38 PM
    ancova, variable in model
    • Replies: 5
    • Views: 1,195
    11-24-2015, 07:30 AM Go to last post
  53. Help with Regression Analysis

    It's been a while since I've done a regression analysis. I'm trying to run a multivariate regression analysis in Excel to determine whether or not...

    Started by cglinn‎, 07-12-2011 09:31 AM
    • Replies: 9
    • Views: 4,263
    07-12-2011, 04:34 PM Go to last post
  54. [Optimization – Solver] Good model fit, but wrong standard deviation coefficients

    Dear reader, I am facing an optimization problem and, at this point, I need help from someone with more knowledge than me. My goal: For a...

    Started by cgmac‎, 04-08-2013 04:54 PM
    excel, non-linear regression, optimization, solver, solvstat
    • Replies: 1
    • Views: 22,744
    04-08-2013, 04:59 PM Go to last post
  55. Linear Discriminant Analysis - Sample size requirements

    As general question, Are 70 observations sufficient to design a reliable decision rule for discriminating between two groups, with a Fisher linear...

    Started by cgmac‎, 06-16-2013 07:29 AM
    discriminant analysis, lda, linear prediction, prediction model, sample size
    • Replies: 3
    • Views: 3,710
    06-16-2013, 12:49 PM Go to last post
  56. Basic regressionquestion

    Hi, I am currently learning ML algorithms and implementing in R. I have a some basic questions. 1.)I know that linear regression an statistical...

    Started by chakravarty456‎, 03-28-2016 05:16 AM
    • Replies: 2
    • Views: 1,332
    03-28-2016, 10:59 AM Go to last post
  57. Help for simple regression

    My research question is: "Can we say that the number of hours of Internet use increases with Internet purchase?" with the variables: - Use of...

    Started by chamarique‎, 05-07-2016 10:57 AM
    independent variable, regression
    • Replies: 3
    • Views: 1,874
    05-08-2016, 06:34 PM Go to last post
  58. significance intepretation DOLS

    the insignificant slopes in Time series regression become significant in DOLS. what general explanation can provide? other than- the use of...

    Started by chandana‎, 12-18-2014 10:59 AM
    • Replies: 0
    • Views: 1,136
    12-18-2014, 10:59 AM Go to last post
  59. How to do Curve fit for data

    I am not able to fit curve for the data I have, and need some help. I removed metal from water and obtained the following results: days Removal...

    Started by Chandrima‎, 08-28-2013 12:55 AM
    • Replies: 5
    • Views: 1,731
    08-28-2013, 10:56 AM Go to last post
  60. What model/method to use to predict/impute missing values?

    First of all, apologies for the long and somewhat general post. I need to analyse the following tourism-related dataset and I'd appreciate any ideas...

    Started by chaps‎, 03-07-2017 05:52 AM
    • Replies: 2
    • Views: 1,324
    03-08-2017, 03:30 AM Go to last post

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