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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Difference-in-differences analysis - STATA syntax for binary data

    Dear Friends, I am doing Difference-in-differences analysis with repeated cross-sectional data. I have both continuous and binary data. I found...

    Started by karen_marti‎, 05-24-2012 03:50 AM
    • Replies: 0
    • Views: 6,169
    05-24-2012, 03:50 AM Go to last post
  2. 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: 1,147
    04-25-2015, 07:15 PM Go to last post
  3. Differences Between ANOVA and multiple regression

    What are the differences between ANOVA and multiple regression? If I want to figure out if there exist impacts of one variable on the other, which...

    Started by lztoby‎, 08-30-2010 09:26 PM
    • Replies: 1
    • Views: 4,303
    08-30-2010, 09:58 PM Go to last post
  4. Differences in different groups

    Hey guys, I need help with a data set I am trying to do analysis on. I have 650 randomly chosen observations of bugs. I want to find out if there...

    Started by jimmycastor‎, 03-30-2014 02:04 PM
    • Replies: 0
    • Views: 1,436
    03-30-2014, 02:04 PM Go to last post
  5. different linear regression formulas from same population

    hello to all, my question needs some explanation first; i want to test the efficiency of formulas for weight prediction but since medical...

    Started by srht ky‎, 03-29-2017 06:32 AM
    • Replies: 2
    • Views: 682
    03-30-2017, 01:46 PM Go to last post
  6. Different p-values with different procedures

    Fairly novice in statistics, so this will surely have a simple explanation. I ran bivariate analyses to check for normality of a series of variables...

    Started by RNG‎, 11-19-2013 06:16 PM
    general linear model, generalized linear model, linear regression, logistic regression, p-values
    • Replies: 1
    • Views: 1,371
    11-20-2013, 01:15 PM Go to last post
  7. Different signs

    Hello everybody: I have a litte problem interpreting my regression output. In the first regression, I have a continuous variable with a...

    Started by Student90‎, 01-23-2016 08:44 AM
    • Replies: 5
    • Views: 1,742
    01-24-2016, 05:09 AM Go to last post
  8. Different Time Intervals with Logistic Regression

    Is it possible to use different time intervals with logistic regression? Let's say I was trying to predict a binary dependent variable (0,1) based...

    Started by mike6‎, 09-27-2011 04:11 PM
    • Replies: 1
    • Views: 2,460
    09-28-2011, 12:27 AM Go to last post
  9. Unhappy different times (different scores) but one regression

    Hi, Does anyone know how to do a regression analysis that incorporates data from 2 time points (same participants)? Up until now I have been...

    Started by Joeyr‎, 07-30-2013 06:37 AM
    • Replies: 0
    • Views: 1,234
    07-30-2013, 06:37 AM Go to last post
  10. Question Dimson method - t-statistics on summarised betas ?

    Hi, Currently trying to apply the Dimson method(Dimson 1979. Link provided below), on the market model due to infrequent trading. Our...

    Started by Sigve‎, 05-23-2016 05:30 AM
    • Replies: 0
    • Views: 2,559
    05-23-2016, 05:30 AM Go to last post
  11. Post Dis./Avantadges of estimating of binary response model with OLS

    In the Maximum Likelihood Estimator context, I can't find answers for those two questions: - What are the advantages and disadvantages of...

    Started by endlessend25‎, 06-30-2016 07:03 AM
    binary response models, mle, ols
    • Replies: 8
    • Views: 2,016
    07-02-2016, 12:47 PM Go to last post
  12. disattenuated correlations

    Objective: a guess about the actual correlations between two variables based on correlations between somewhat noisy variable estimates. The variable...

    Started by Per‎, 09-18-2010 01:39 AM
    • Replies: 0
    • Views: 4,036
    09-18-2010, 01:39 AM Go to last post
  13. Question Discrepancy between Geogrebra, Excel, Desmos, and TI-83 PLUS...what's the deal?

    As my title implies, there is a discrepancy between Geogebra, Excel, Desmos, and TI-83 Plus. Let me explain myself I have created a fifth and...

    Started by nddn‎, 02-21-2015 03:19 PM
    • Replies: 3
    • Views: 2,257
    02-21-2015, 08:09 PM Go to last post
  14. Discrete regression

    What is the/an appropriate regression technique to use where the dependent variables are discrete labels. For example, I have predicted survival...

    Started by marius1‎, 04-12-2011 11:59 AM
    • Replies: 0
    • Views: 2,394
    04-12-2011, 11:59 AM Go to last post
  15. Discretization of a continuous variable

    He guys, I'm analyzing a research regarding patients and their risk factors for developing a certain side effect. If i enter age as a continous...

    Started by XPeriment‎, 03-26-2015 06:05 AM
    • Replies: 14
    • Views: 3,244
    03-28-2015, 09:53 AM Go to last post
  16. Post Discriminant Analysis Issue

    Hello, I'm trying to make sense out of a recent discriminate analysis I ran which confused me. I got really a really low eigenvalue which...

    Started by cinta19‎, 02-27-2011 07:26 PM
    • Replies: 0
    • Views: 3,228
    02-27-2011, 07:26 PM Go to last post
  17. 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: 1,759
    04-14-2014, 07:11 AM Go to last post
  18. Displaying multiple regression

    Dear stats experts - I wondering if it's possible to display a multiple regression with three predictors that are all significant on a graph. ...

    Started by antonzzz‎, 11-30-2011 06:50 AM
    • Replies: 0
    • Views: 1,602
    11-30-2011, 06:50 AM Go to last post
  19. disputing a fixed effects model assumption

    Hi guys, I'm in the middle of responding to a reviewer's claim on fixed effects models and wanted to reach out to see if any of you had any...

    Started by Link‎, 04-11-2012 12:29 PM
    • Replies: 0
    • Views: 1,423
    04-11-2012, 12:29 PM Go to last post
  20. Dissertation help with Likert scale

    Hello, I'm having some problems with the stats for my dissertation. My dissertation is about the effect of the physical surroundings of a...

    Started by Bunecarera‎, 04-15-2008 05:28 AM
    • Replies: 9
    • Views: 11,500
    04-16-2008, 01:27 PM Go to last post
  21. Exclamation Dissertation help!

    I need help with regression analysis. I have 3 variables, each with sub scales. and I have no idea how to regress them; i.e. should i use stepwise...

    Started by Mystical_lady89‎, 01-26-2013 12:18 PM
    • Replies: 1
    • Views: 944
    01-26-2013, 05:28 PM Go to last post
  22. Distribution of error term in lognormal maximum likelihood estimation

    Hi I have performed a maximum likelihood estimation of a linear function y=B0+B1X+E, where Y is a lognormally-distributed dependent variable, B0 and...

    Started by gjdoole‎, 07-09-2012 12:49 AM
    • Replies: 1
    • Views: 2,121
    07-09-2012, 08:47 AM Go to last post
  23. Distribution of fixed effects

    Hi all, Let me shortly introduce my research: I am looking at whether companies outperform each other in investments. To do this I observe them at...

    Started by daniel_smit‎, 06-09-2017 05:07 AM
    distribution, fixed effect model, normal distributed, panel data
    • Replies: 3
    • Views: 841
    06-09-2017, 11:56 AM Go to last post
  24. Distribution of Residual Sum of Squares

    We know that the residual sum of squares (RSS) has a  sigma^2 * Chi Square (n-p degrees of freedom) So if I want to simulate many...

    Started by spairos‎, 01-02-2014 06:09 PM
    • Replies: 3
    • Views: 3,417
    01-02-2014, 09:07 PM Go to last post
  25. Division of two IV's in a logistic regression

    Hello, I am conducting a logistic regression with two continuous IV's (x1 and x2). I am also interested to analyze the relative impact of both...

    Started by Jonas‎, 10-31-2012 05:29 AM
    • Replies: 0
    • Views: 910
    10-31-2012, 05:29 AM Go to last post
  26. Do I have a discrete fit parameter if I fit data to the Heaviside step function?

    Hey guys, A question about discrete parameters in a maximum likelihood estimation fit situation: I have seven data points, every data point...

    Started by Hombre‎, 01-24-2014 08:58 AM
    • Replies: 0
    • Views: 748
    01-24-2014, 08:58 AM Go to last post
  27. Do I have a non-linear regression?

    Hello everyone, I want to start by saying that I don't have too much experience working with continuous dependent variables. I have worked more...

    Started by Marvin85‎, 02-26-2016 03:22 PM
    non-linear regression, predict, predicted y terms
    • Replies: 5
    • Views: 1,749
    05-04-2016, 02:19 AM Go to last post
  28. Do I need to control for Type 1 errors?

    Hi guys, the situation I have is, a reviewer has asked me to reduce my mediation model (MPLUS) as he says I have too many tests going on. In fairness...

    Started by DrFurbs‎, 01-10-2015 02:31 PM
    • Replies: 5
    • Views: 2,251
    01-14-2015, 03:09 PM Go to last post
  29. Do i need to correct for family wise error when doing moderation and mediation?

    Hi, I've been analyzing data for moderating and mediating relationships and am wondering how necessary it is to correct for family wise error in...

    Started by LisaB‎, 07-30-2014 09:19 PM
    family wise error, mediation, moderation, type i error, type ii error
    • Replies: 0
    • Views: 854
    07-30-2014, 09:19 PM Go to last post
  30. Do I need to measure reliability?

    Hey guys, I am very new to SPSS so please excuse me for my potentially stupid questions. So I started writing my thesis and everybody from my...

    Started by IvLi‎, 05-16-2013 08:29 AM
    • Replies: 1
    • Views: 1,762
    05-16-2013, 10:35 AM Go to last post
  31. 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: 2,071
    06-09-2015, 11:38 AM Go to last post
  32. Do I need to treat all variables in the same way when I transform values?

    Hi, I want to carry out a Pearsons correlation to look relationships between methane flux from soil under different plantation treatments (i.e...

    Started by froglett‎, 02-16-2008 08:24 AM
    • Replies: 3
    • Views: 6,441
    02-17-2008, 02:13 PM Go to last post
  33. Do my data meet the assumptions for multiple linear regression?

    ~ There are no outliers in the standard residuals ~ Multicollinearity is not a concern ~ Independent errors are met (Durbin-Watson = 1.95) ~...

    Started by memomemootoo‎, 01-21-2014 02:09 PM
    • Replies: 7
    • Views: 3,312
    01-23-2014, 08:12 AM Go to last post
  34. Do these dummy variables cancel clustered heteroscedasticity?

    Hi, I have the cross-sectional: Stock returns_i = a_i + b_i * X_i + error. Here, X_i is an independent variable and "Stock returns" is, say,...

    Started by derksheng‎, 07-15-2012 08:15 AM
    • Replies: 0
    • Views: 1,480
    07-15-2012, 08:15 AM Go to last post
  35. Do you think there is any correlation between this two variables?

    Do you think there is any correlation between these two variables? scatterplot: http://www.directupload.net/file/d/3641/5g58d9hx_jpg.htm data...

    Started by DanielFox‎, 06-02-2014 09:33 AM
    correlation
    • Replies: 1
    • Views: 1,439
    06-02-2014, 09:34 AM Go to last post
  36. Does anybody know if the Oaxaca Blinder decomposition command is now available SPSS?

    Hi, I was wondering if it was now possible to run the Oaxaca Blinder decomposition on SPSS? I know it is possible on Stata but I do not wish to...

    Started by Dubuclawrence‎, 09-23-2013 05:42 PM
    oaxaca blinder, regression analysis, spss
    • Replies: 0
    • Views: 2,557
    09-23-2013, 05:42 PM Go to last post
  37. Does endogeneity affect the R-squared estimated in variance partitioning?

    Hi, I have a likely very simple question but I can’t get my head around the answer. I want to estimate which part of the variance in a firm's...

    Started by Peter Schmid‎, 05-02-2017 06:01 PM
    endogeneity, r-squared, variance partitioning
    • Replies: 1
    • Views: 848
    05-03-2017, 11:07 AM Go to last post
  38. Does fitting of a regression line as such contribute to mass significance?

    Is the fitting of a regression line (least squares, for a given number of predictors) as such to be regarded a statistical test that can contribute...

    Started by Bassler‎, 03-06-2012 05:04 AM
    false positives, fitting a line, least squares, mass significance, regression line
    • Replies: 0
    • Views: 1,560
    03-06-2012, 05:04 AM Go to last post
  39. Does OLS have to be properly specified before GWR

    Hi, I'm having some difficulties with properly specifying an OLS regression but want to use GWR as its more appropriate for my study. My issue is,...

    Started by lau86‎, 10-23-2012 09:43 AM
    • Replies: 0
    • Views: 906
    10-23-2012, 09:43 AM Go to last post
  40. Does rate of change in proportion variable depend on ranked independent variable?

    I am doing an analysis on the prevalence of a drug resistance mutation in a particular country and how prevalence changed over time. Samples were...

    Started by bushmanm‎, 03-31-2015 07:38 PM
    • Replies: 0
    • Views: 894
    03-31-2015, 07:38 PM Go to last post
  41. Does the intercept p value matter?

    Hi, I have outputs of a simple linear model as follows: y = 0.0339 + 0.27918X The p value of the intercept is 0.206 and of the slope is...

    Started by anglais428‎, 03-08-2011 06:48 AM
    intercept p value
    • Replies: 4
    • Views: 50,549
    03-28-2011, 08:14 PM Go to last post
  42. Does the intercept p value matter?

    Hi everyone, I work on a model with logistic regression as a result I have intercept value = 0.06 , with a p-value = 0.86. Does this model...

    Started by valko‎, 10-16-2015 06:56 AM
    • Replies: 5
    • Views: 2,036
    10-17-2015, 04:20 AM Go to last post
  43. Does the standard error of the regression not need to be corrected by n?

    The standard error of an estimator is defined as the square root of the the estimator variance (or mean squared error (MSE) for unbiased estimators)....

    Started by Econstats‎, 10-07-2013 01:15 PM
    ols, standard error, sum of square type, variance
    • Replies: 2
    • Views: 1,106
    10-07-2013, 01:49 PM Go to last post
  44. Does vce(robust) correct not normally distributed errors (dependent variable)?

    Hello everyone, I have a question regarding the vce(robust) command in Stata. I have used this command for dealing with heteroskedasticity. I have...

    Started by CheersToStata‎, 07-24-2013 06:10 AM
    distribution, error term, vce(robust)
    • Replies: 0
    • Views: 1,319
    07-24-2013, 06:10 AM Go to last post
  45. Doing a stepwise mutiple regression

    Hi everyone, I've got two continuous DVs (N = 48, so not a huge sample) and three inter-correlated, continuous IVs. I'm interested in finding out...

    Started by lindles‎, 08-13-2013 07:01 AM
    • Replies: 8
    • Views: 2,286
    08-13-2013, 11:05 AM Go to last post
  46. Doing correct backwards elimination with interaction terms?

    I'm wondering about this, and I can't find an answer anywhere. My textbook (Agresti and Finlay 2009) clearly says how to do backwards elimination on...

    Started by Lukan27‎, 01-26-2015 12:49 PM
    2 Pages
    1 2
    backwards, correct, elimination, interaction, term
    • Replies: 15
    • Views: 6,860
    01-27-2015, 10:27 AM Go to last post
  47. Doing logistic regression using epi-info

    Hi there! I'd really appreciate help with this one. I'm finding the prevalence of anemia and its determinants. There are about 23 factors that...

    Started by confusedmedstudent‎, 12-10-2006 05:01 AM
    • Replies: 0
    • Views: 6,714
    12-10-2006, 05:01 AM Go to last post
  48. Double check sample calculation from pilot study

    I am really a neophyte to statistics but am in the middle of a research project and would appreciate someone checking my calculations. I ran a...

    Started by lph2005‎, 02-23-2009 01:35 AM
    • Replies: 3
    • Views: 5,873
    03-01-2009, 09:28 PM Go to last post
  49. 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...

    Started by psrs0810‎, 11-20-2014 10:11 AM
    • Replies: 1
    • Views: 1,028
    11-20-2014, 03:08 PM Go to last post
  50. Doubt regarding Multiple Regression

    Hi, I have some doubt in Multiple regression. I have Y as the dependent variable (mutual fund returns) I have many independent variables...

    Started by akshay_ajmani‎, 04-20-2008 03:40 PM
    • Replies: 2
    • Views: 3,015
    04-24-2008, 01:13 PM Go to last post
  51. Drawing polynomial out of regression results table of a fixed effects regression

    Dear all, maby its a simple question but I could not find a compelling answer in books or papers: I run a fixed effects regression giving me a...

    Started by balae‎, 10-14-2011 09:29 PM
    • Replies: 3
    • Views: 2,775
    10-15-2011, 04:06 PM Go to last post
  52. Drop down menu in R

    Has anyone of you worked on drop down menu in R ?

    Started by sonaljaikar‎, 08-07-2010 01:16 AM
    • Replies: 1
    • Views: 2,860
    08-07-2010, 01:32 AM Go to last post
  53. Drop in deviance question

    Hello, I'm trying to look at the significance of a covariate through a drop in deviance test of two Poisson models. For example, mod1 might have...

    Started by kirkby‎, 10-09-2012 05:49 PM
    • Replies: 0
    • Views: 2,325
    10-09-2012, 05:49 PM Go to last post
  54. dummy coding help for cat variables

    I have a questionnaire with 28 items - 20 items are Likert attitude questions. In fact there are 5 main variables (constructs?) being measured by 4...

    Started by ehb23‎, 12-06-2006 07:26 PM
    • Replies: 0
    • Views: 4,078
    12-06-2006, 07:26 PM Go to last post
  55. Dummy coding in linear regression, with an interaction

    I am using linear regression with a categorial variable (3 levels of stress manipulation) and continuous variables. I am unsure how to dummy code my...

    Started by Liz4218‎, 10-06-2013 03:08 AM
    • Replies: 1
    • Views: 4,137
    10-30-2013, 09:29 PM Go to last post
  56. Dummy Coding of Variable and interpretation

    Discussion One of my IV in my regression analysis is religion 1=Catholic 2=Jewish 3=Protestant 4=muslim 5=other 6=none I recoded religion as...

    Started by Dee6619‎, 11-28-2012 04:18 PM
    • Replies: 8
    • Views: 2,723
    11-29-2012, 01:43 AM Go to last post
  57. Question dummy regression - unequal sample sizes

    Hello, I am conducting a linear regression analysis in SPSS with different variables: - scale, - 2-level nominal, - 5-level nominal (dummy)...

    Started by Pernelle‎, 05-15-2016 09:50 AM
    dummy, regression, unequal sample size
    • Replies: 0
    • Views: 1,180
    05-15-2016, 09:50 AM Go to last post
  58. 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: 2,778
    08-27-2010, 03:09 AM Go to last post
  59. dummy regression with polytomous variable

    Hello, I want to perform a linear regression analysis. My DV is continuous (score between 0 and 6), and my predictors are: - one dichotomous...

    Started by Pernelle‎, 05-05-2016 03:03 PM
    • Replies: 1
    • Views: 1,208
    05-10-2016, 02:35 PM Go to last post
  60. Dummy variable for EMU countries

    Hello everyone :-) I have a dataset for 22 countries with 12 variables, where this two are important for this assigment: country1 Three-letter...

    Started by JoLinda91‎, 04-09-2015 12:51 PM
    • Replies: 0
    • Views: 1,620
    04-09-2015, 12:51 PM Go to last post

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