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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. A good text on generalised linear models?

    Does anyone have any good recommendations on texts on generalised linear models without matrix notation? Cheers.

    Started by .ACS.‎, 03-28-2010 12:17 PM
    • Replies: 2
    • Views: 3,227
    03-28-2010, 03:01 PM Go to last post
  2. Contructing an econometrics project

    Hi guy. I'm doing a econometrics project and I have been given a task to find out what factors determine the male wage. I have been given a lot...

    Started by 00mirshahia‎, 04-03-2013 03:19 PM
    • Replies: 3
    • Views: 1,919
    04-06-2013, 10:01 PM Go to last post
  3. Multiple Regression Analysis Issue

    Hi everyone I have just signed up! I am currently doing a thesis & struggling with my regression model. I am examining the link between profit...

    Started by 1114368@rgu.ac.uk‎, 09-10-2012 04:09 PM
    dummy variable, help needed, hypothesis testing, multiple regression, problem
    • Replies: 6
    • Views: 2,905
    09-17-2012, 12:54 AM Go to last post
  4. testing regressions

    Hi, I have a very simple question: when I run a regression what are the things that I should test for to make sure that my regression is solid....

    Started by 12345678‎, 04-23-2011 11:38 AM
    • Replies: 1
    • Views: 2,287
    04-25-2011, 10:14 AM Go to last post
  5. Multicollinearity

    Hi, I am trying to detect multi-collinearity in my regression model.I ran the Belsley, Kuh, Welsch Variance-decomposition and i saw that for k=607...

    Started by 12345678‎, 07-16-2011 04:39 AM
    • Replies: 0
    • Views: 2,008
    07-16-2011, 04:39 AM Go to last post
  6. Winsorizing when I have different size groups

    I have a sample that consists of large, medium, and small firms and i want to run a separate regression for each size group. When I winsorize a...

    Started by 12345678‎, 02-03-2017 04:41 AM
    outliers
    • Replies: 0
    • Views: 1,999
    02-03-2017, 04:41 AM Go to last post
  7. 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...

    Started by 12345678‎, 08-10-2017 06:11 AM
    interaction, multicolinearity
    • Replies: 0
    • Views: 376
    08-10-2017, 06:11 AM Go to last post
  8. identification with ordinal independent variable

    Hi, Can you help me find the relevant literature for this problem? My regression model is: Yi=Xi*b+Ei, where Yi is income and Xi is a score, Ei...

    Started by 2282‎, 01-26-2011 03:49 PM
    • Replies: 1
    • Views: 3,242
    01-26-2011, 10:15 PM Go to last post
  9. Calculating Omega Squared

    Hi All I have been battling with my stats over the last two months and have managed, by reading books and researching the web, to stumble through...

    Started by 2461c‎, 07-26-2009 06:30 AM
    • Replies: 2
    • Views: 26,817
    07-28-2009, 10:25 AM Go to last post
  10. Which test to use?

    I have just learned that I chose the wrong test for my data and I am now at a total loss. Basically I sent out a questionnaire which had a likert...

    Started by 2461c‎, 07-28-2009 10:31 AM
    • Replies: 3
    • Views: 2,470
    08-01-2009, 02:44 AM Go to last post
  11. Regression question

    I have data from 20 groups of 5 people (assigned randomly) making binary decisions within the same group for 20 times. Each period, within each group...

    Started by 312a‎, 10-19-2012 08:42 PM
    • Replies: 0
    • Views: 1,515
    10-19-2012, 08:42 PM Go to last post
  12. Nested continuous Regression conditioned on dummy

    Hi, Does anyone know what model to use for the following issue: I would like to estimate transaction size (continuous dependent variable) using...

    Started by 3ha0t1cdy‎, 04-02-2013 11:59 PM
    logit, nested, regression, stage
    • Replies: 2
    • Views: 2,274
    04-03-2013, 06:19 PM Go to last post
  13. Lightbulb Exclude Interaction Term and Include Fixed Effects instead

    Hey everybody. I know I shouldn't exclude the terms of an interaction variable in my regression; however, If I include both terms I have the...

    Started by 5forwards‎, 05-29-2011 08:57 AM
    • Replies: 0
    • Views: 2,676
    05-29-2011, 08:57 AM Go to last post
  14. Linear R^2 Values as Percent Weights for Multiple Variable Formula?

    Hey guys, Statistics is not my strong suit.. The closest I've been to statistics is a college level Biology II class I took three years ago.. But...

    Started by 7rashcan‎, 05-07-2012 05:20 PM
    multiple regression, percent, r squared, r^2, weights
    • Replies: 1
    • Views: 2,842
    05-10-2012, 06:12 PM Go to last post
  15. Smile query regarding generalized linear models

    hello all, I have a query regarding GZLMs. I have a variable A non-normally distributed and I also take the logA, which is normally distributed to...

    Started by 7xen‎, 02-07-2013 10:37 AM
    • Replies: 2
    • Views: 1,901
    02-07-2013, 12:22 PM Go to last post
  16. [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: 2,415
    04-28-2014, 08:34 AM Go to last post
  17. unrestricted cumulative probit model with vglm()---extend to a multivariate setting?

    Hello. I'm trying to fit a multivariate, unrestricted cumulative probit model. I've had success in fitting a proportional odds probit model using...

    Started by @nthRo‎, 03-27-2012 06:44 PM
    • Replies: 0
    • Views: 1,964
    03-27-2012, 06:44 PM Go to last post
  18. multivariate ordered probit regression---use standard bivariate normal distribution?

    Hello. My two previous posts (1 & 2) have about 100 views each, but no replies, so I must have done a poor job asking the question. So, here is...

    Started by @nthRo‎, 04-04-2012 12:17 AM
    • Replies: 2
    • Views: 2,984
    04-04-2012, 11:09 AM Go to last post
  19. Smile Small question regarding linear mixed effect model

    Thanks so much for reading my post. I've listed key points below. Hopefully once completing reading my problem will become clear. X is an...

    Started by aaphill‎, 10-13-2011 10:49 PM
    • Replies: 0
    • Views: 1,959
    10-13-2011, 10:49 PM Go to last post
  20. Multivariate analysis, canonical correlation

    Hello, I conducted an experiment with 18 subjects who participated in a simulator experiment. Each participant had to perform a task with 6...

    Started by aapje123‎, 04-28-2016 09:08 AM
    • Replies: 0
    • Views: 1,354
    04-28-2016, 09:08 AM Go to last post
  21. Coefficients in linear regression

    hi i am using spss 17.0 i am using linear regression to predict behaviours for the coefficent output does the constant and the indperpentant...

    Started by aarong‎, 07-21-2011 09:15 AM
    • Replies: 6
    • Views: 3,691
    07-21-2011, 03:32 PM Go to last post
  22. Field's test for linearity of the logit

    Hello, I am currently working on my bachelor thesis and I ran a logistic regression on a data set I have. From Field's 'Discovery Statistics...

    Started by abced‎, 05-17-2016 07:19 AM
    • Replies: 0
    • Views: 1,808
    05-17-2016, 07:19 AM Go to last post
  23. how to argue using wald-test/LR-test for logistic Regression

    Hey there, I'm writing my thesis and I did a logistic regression in a data set. At first, it didn't come into my mind that I should argue why I'm...

    Started by abced‎, 05-25-2016 07:38 AM
    • Replies: 0
    • Views: 680
    05-25-2016, 07:38 AM Go to last post
  24. how to interpret the interaction term in panel data?

    My econometric model include an interaction term. i have some doubts in my mind. can we say that the interaction term is only the multiplication of...

    Started by abdulhannan‎, 11-22-2012 08:00 AM
    • Replies: 0
    • Views: 2,450
    11-22-2012, 08:00 AM Go to last post
  25. Multiple Regression Equation Analysis for Percentage?

    Hi, I am hoping someone can help me understand something. I have the following multiple regression equation (note thse numbers are just an example...

    Started by abe333200‎, 11-02-2013 02:02 PM
    • Replies: 4
    • Views: 3,128
    11-02-2013, 02:36 PM Go to last post
  26. Seek non-black box alternative to random forest

    I've recently had a research manuscript rejected by an editor. The manuscript showed that for a real life data set, random forest outperformed...

    Started by abendrot‎, 05-30-2017 11:04 AM
    • Replies: 1
    • Views: 1,510
    05-30-2017, 11:55 AM Go to last post
  27. Regression - What to do with insignificant variables?

    Please pardon me if you find this question very silly but this doubt has been troubling me for some time now whenever I want to run a regression. ...

    Started by abhi1495‎, 09-01-2015 03:27 PM
    insignificant, regression analysis, variables
    • Replies: 2
    • Views: 3,115
    09-02-2015, 02:30 AM Go to last post
  28. Logistic Regression

    Helo I am faced with a problem which looks to be a clear case of logistic regression. A dependent variable(binary in nature) needs to be...

    Started by Abhijeet30‎, 06-08-2013 11:20 AM
    • Replies: 4
    • Views: 2,463
    06-10-2013, 12:14 PM Go to last post
  29. Dependent variable is function of itself

    I have a model: qty=a.price+....(other IVs) Price is calculated as sales_amount/qty. Hence for a customer, if we aggregate data of a certain...

    Started by abhik‎, 02-27-2015 01:17 PM
    • Replies: 2
    • Views: 1,923
    02-27-2015, 08:55 PM Go to last post
  30. Post How to estimate quasi-elasticities from marginal effects of logistic regression?

    HI everyone, I am new to this forum. I need some help regarding logistic regression analysis. I am using logistic regression for my research. I...

    Started by abiduaf‎, 08-09-2014 07:11 AM
    logistic regression, quasi-elasticities, r-statisitcs
    • Replies: 0
    • Views: 1,398
    08-09-2014, 07:11 AM Go to last post
  31. z-Transformation and interpretation

    My independent variables are mainly measured in percentages but also Euro and Age. Do I need to do a z-transformation? And how can I interprete...

    Started by Abigail‎, 11-28-2013 04:59 PM
    • Replies: 0
    • Views: 1,251
    11-28-2013, 04:59 PM Go to last post
  32. Multiple Regression Analysis - Two independent variables, one w/same values

    Post closed.

    Started by ablong‎, 06-13-2016 12:18 AM
    econometrics
    • Replies: 4
    • Views: 1,641
    06-13-2016, 09:23 AM Go to last post
  33. Exclamation How to run AIC and Logit on Panel Data?

    I've data for 10 banks over a period of last 10 years. I've financial ratios for each bank corresponding to each financial year. There are 20 such...

    Started by AbMeena‎, 03-14-2017 05:03 AM
    aic, econometrics, regression
    • Replies: 0
    • Views: 1,359
    03-14-2017, 05:03 AM Go to last post
  34. Averaging x and y before fitting regression model

    Hi everyone:wave::wave::wave: I have faced problem in my research when i fit a regression model my question is can i make moving average for...

    Started by abod1409‎, 04-14-2015 02:34 PM
    • Replies: 0
    • Views: 2,130
    04-14-2015, 02:34 PM Go to last post
  35. Using OLS vs Probit/Logit to estimate a threshold

    Suppose you're a meteorologist and want to predict whether tomorrow the temperature will exceed 20 degrees. Your boss gives you data where t is...

    Started by aboluk‎, 07-03-2012 06:57 PM
    • Replies: 7
    • Views: 4,536
    07-04-2012, 04:21 PM Go to last post
  36. Simple effects for 3-way interaction

    Hi, I'm doing a regression analysis with a continuous outcome variable (motivation), 2 continuous predictor variables (income and age), and 1...

    Started by absolutcdn‎, 02-26-2014 04:41 PM
    anova, continuous variable, dichotomous iv, linear regression, regression, simple effects
    • Replies: 1
    • Views: 1,486
    02-28-2014, 12:29 AM Go to last post
  37. interpreting parameters in multivariate multiple regression

    Hi all, I have a repeated measures multivariate multiple regression. All measures were sampled three times (hence, Time is the within subject...

    Started by abstoler‎, 12-28-2012 12:27 PM
    • Replies: 0
    • Views: 1,592
    12-28-2012, 12:27 PM Go to last post
  38. Regression Analysis from R output

    plz delete this thread.

    Started by absxneverdie‎, 06-17-2016 09:50 AM
    • Replies: 0
    • Views: 1,172
    06-17-2016, 09:50 AM Go to last post
  39. Statistical inference.

    Hi there, I would like to ask a couple of basic questions: 1. What is the difference between estimation and hypothesis testing? I mean are they...

    Started by Abubaker‎, 01-08-2017 06:25 AM
    hypothesis testing, model selection, modeling techniques, statistical inference
    • Replies: 1
    • Views: 2,792
    01-09-2017, 02:01 PM Go to last post
  40. inverse transformation and reflection

    Hi all, I'm doing a multiple regression analysis and my outcome variable is strongly positively skewed. Without transformation skewness = 2.10...

    Started by abuschgens‎, 04-29-2011 05:18 AM
    • Replies: 0
    • Views: 2,932
    04-29-2011, 05:18 AM Go to last post
  41. Least squares estimate of alpha and beta

    My group have different opinions towards the following question: Find the least squares estimate of alpha and beta of the mechanistic growth...

    Started by acc_aac‎, 11-24-2016 05:02 AM
    nonlinear regression
    • Replies: 1
    • Views: 3,104
    11-24-2016, 10:23 AM Go to last post
  42. How to develop a regression expression using factor scores?

    Hi, I have four factors for fourteen variables. I want to develop a regression expression for a dependent variable using the correlated variables....

    Started by aceprod51‎, 01-21-2007 03:22 PM
    • Replies: 1
    • Views: 4,301
    01-23-2007, 10:05 PM Go to last post
  43. Regression with two categorical predictors and 1 control/covariate?

    Hello, I'm in need of help as these analyses I describe are for my thesis so any input would be greatly appreciated. By the way, I am using IBM...

    Started by acer539‎, 05-13-2012 02:57 PM
    • Replies: 1
    • Views: 2,490
    05-14-2012, 03:04 AM Go to last post
  44. Exclamation Help Non linear Growth Models - Derivates

    Hi!!! im amateur in mathemathicals growth models but im doing my graduated work in adjust five differents models in some growth parameters in onion,...

    Started by acocac‎, 01-27-2011 06:59 PM
    gauss, nonlinear
    • Replies: 0
    • Views: 2,573
    01-27-2011, 06:59 PM Go to last post
  45. Regression Analysis for comparison of crime rates across a river

    I need a bit of help refining a regression comparing crime rates of counties separated by a river. My current equation looks like: ...

    Started by acoll‎, 11-25-2014 04:43 PM
    • Replies: 1
    • Views: 1,456
    11-27-2014, 10:31 PM Go to last post
  46. Moderated multiple regression and mixed factorial ANOVA

    I conducted a moderated multiple regression and a mixed factorial ANOVA on the same variables and got two different results (using moderated multiple...

    Started by acue‎, 06-06-2011 10:48 PM
    • Replies: 5
    • Views: 7,727
    08-27-2011, 03:52 PM Go to last post
  47. Mediation regression

    Hi all, I have a question regarding an analysis I just ran. I ran a mediation analysis using a bootstrap approach (requiring me to look at the...

    Started by acue‎, 06-30-2012 05:44 PM
    • Replies: 3
    • Views: 2,194
    10-04-2012, 03:54 AM Go to last post
  48. Phonetics: Interactions without one of the main effects

    I am using a logistic regression model with bias reduction in order to predict the contrast between /b/ and /p/ in Ojibwe based on acoustic...

    Started by Adam J.R. Tallman‎, 04-22-2011 09:11 PM
    aic discriminant, interaction effect
    • Replies: 5
    • Views: 3,807
    04-23-2011, 03:32 PM Go to last post
  49. Subadditivity?

    I am being asked whether certain interactions in a multiple logistic regression model with are subadditive or not. I was told to use a graph to...

    Started by Adam J.R. Tallman‎, 04-24-2011 10:23 PM
    • Replies: 1
    • Views: 1,907
    04-24-2011, 10:24 PM Go to last post
  50. Choosing test for longitudinal, repeated measures and clustered data

    Hi everyone! I'm a researcher within cardiovascular medicine, currently working on a study in endocrinology (diabetes). I have the following...

    Started by Adam1‎, 11-27-2013 05:10 PM
    longitudinal data, repeated measures
    • Replies: 0
    • Views: 1,409
    11-27-2013, 05:10 PM Go to last post
  51. Interpreting log-linear coefficients

    Hi there, I am fairly new to regression and have been set the task of modelling a data set in the form ln(y) = bx1 +bx2 +bx3 +bx4 +bx5 + e. In...

    Started by adam15‎, 04-18-2012 06:37 AM
    • Replies: 3
    • Views: 6,273
    06-22-2012, 04:19 AM Go to last post
  52. SPSS - Regression - interpretation and generalizing results

    Hello, Im really grateful you have taken the time to read my post. Thanks for your help. Im doing a regression analysis trying to predict...

    Started by Adam35‎, 05-16-2016 06:46 AM
    • Replies: 2
    • Views: 1,453
    05-16-2016, 08:36 AM Go to last post
  53. Mallows Cp selection

    I am using the best subsets method in Minitab to select the best parameters for a multiple regression, but I'm a bit confused on Mallows Cp. Some...

    Started by adama‎, 03-31-2012 02:51 PM
    mallows cp, multiple regression, regression
    • Replies: 3
    • Views: 17,191
    04-01-2012, 02:13 PM Go to last post
  54. WHICH Test Analysis Can I use ?

    I am kindly requesting your kind advise. I am doing an analysis for collected data of experimental design using control group, but my participants in...

    Started by AdelA‎, 02-22-2014 03:24 PM
    • Replies: 5
    • Views: 2,610
    03-04-2014, 01:52 PM Go to last post
  55. Anova problems.........please help.thank you

    1.A study has been conducted to determine whether the mean spending for recreational activities during the month of August differs for residents of...

    Started by adeola1820‎, 04-23-2007 12:20 AM
    • Replies: 0
    • Views: 3,952
    04-23-2007, 12:20 AM Go to last post
  56. how to intepret this result for my thesis

    Please can anyone assist me on how to interpret the attached t-test result. Thank you.

    Started by adibulileka‎, 01-08-2012 11:35 PM
    • Replies: 1
    • Views: 2,254
    01-09-2012, 12:07 AM Go to last post
  57. Can I combine PCA terms with real variables?

    Hello, I'm new to this forum. Hopefully I am doing this right! I am trying to do a multiple regression analysis on a data set that has about 250...

    Started by Adrian_‎, 03-24-2014 04:47 PM
    • Replies: 0
    • Views: 1,604
    03-24-2014, 04:47 PM Go to last post
  58. Difference-in-Differences(Evaluate effect of a policy implemented gradually)

    Hi I have to do a diff-in-diff estimator in order to evaluate the impact of the policy. The problem is that the policy is gradually implemented...

    Started by adrift‎, 04-25-2015 07:15 PM
    • Replies: 0
    • Views: 1,283
    04-25-2015, 07:15 PM Go to last post
  59. Binary logistic regression to analyze Likert Scale questionnaire

    Hi, I am sort of stuck with the following problem concerning logistic regression analysis in my research on the determinants of technology...

    Started by adrmck17‎, 04-28-2012 12:24 PM
    • Replies: 0
    • Views: 4,192
    04-28-2012, 12:24 PM Go to last post
  60. Logistic regression analysis - Large beta coefficients

    Hi, I have just run a logistic regression analysis on 7 IVs and a dichotomous DV. The IVs are regression-weighted composite scores of Likert scale...

    Started by adrmck17‎, 04-30-2012 09:54 AM
    • Replies: 3
    • Views: 4,915
    05-01-2012, 02:46 AM Go to last post

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