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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Question on interpreting test statistics/regression coefficients

When I run a regression of: logwage = height + dummy variables for each different occupation The coefficients on the dummy variables are all...

• Replies: 3
• Views: 1,528
03-01-2014, 05:18 PM
2. ### Mincer equation - problems with multicollinearity

I'm trying to construct a Mincer equation for earnings, however when I run the regression, there is a problem of multicollinearity between experience...

• Replies: 1
• Views: 1,686
03-02-2014, 09:38 PM
3. ### Can someone help me interpret this data?

I'm performing multiple regression for an international relations thesis regarding various predictor variables and the outcome of intervention in...

• Replies: 5
• Views: 1,140
06-19-2016, 06:58 PM
4. ### Least Squares

• Replies: 8
• Views: 3,292
09-09-2015, 06:21 PM
5. ### R2 significance for smooth data

I think this is a simple question but I've been unable to find an answer in textbooks, by searching this forum or on-line. How do I determine if an...

• Replies: 0
• Views: 1,090
01-16-2013, 11:23 AM
6. ### Looking for mult. linear regression equations

Hi - I'm having trouble finding the equations for the coefficients for a multiple linear regression with two independent variables (a=, b1=, b2=). ...

• Replies: 1
• Views: 3,070
11-26-2008, 08:13 PM
7. ### Confused about my Logistic Regression output (SPSS)

Hi Guys, I've conducted a binary logistic regression using 2 categorical predictors (Static-moving and moving-static) and an outcome variable...

• Replies: 4
• Views: 1,227
04-06-2016, 04:44 AM
8. ### Constructing Prediction Intervals for Forecasted Values in a Time Series

I have a time series with 231 data points and the following descriptive statistics: Mean 75,231.66 Standard Error 969.98 Median 70,728.00 ...

• Replies: 3
• Views: 5,643
09-18-2013, 09:14 AM
9. ### is there a non parametric alternative to multiple linear regression?

Hi all, I would like to know is there a non parametric alternative to multiple linear regression? when I google the quesion I get a lot of info...

• Replies: 7
• Views: 27,985
10-07-2010, 03:37 PM
10. ### Data set simulation

• Replies: 1
• Views: 2,168
07-07-2016, 01:12 PM
11. ### 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...

• Replies: 0
• Views: 877
06-26-2015, 11:18 AM
12. ### [Probit] Can I be confident in my results even with a poor Goodness-of-Fit test?

I am running a probit analysis on a data set with about 1000 cases, predicting probability of college graduation by a set of college institutional...

• Replies: 3
• Views: 4,319
02-18-2011, 03:27 PM
13. ### Probit Model: Liklihood Ratio Significant, Very Low Pseudo R-Square

I'm running a probit model in Stata, and I'm a bit confused by the results. The LR test is highly significant, .0000, but the Pseudo R-Square is very...

• Replies: 0
• Views: 5,045
02-25-2011, 02:34 AM
14. ### Addendum: Probit Model, Liklihood Ratio Significant, Very Low Pseudo R-Square

Multicollinearity does not appear to be a problem. None of the predictor variables has a VIF over 1.5.

• Replies: 2
• Views: 3,839
02-25-2011, 11:23 AM
15. ### Regression Assumptions for Binary Dependent Variable Models?

I was wondering if anyone could direct me to a good source on this, or just answer my question directly. What are the assumptions made for a...

• Replies: 3
• Views: 19,002
03-04-2011, 12:20 PM
16. ### Standard error of multiple regression coefficients

I was revising my undergraduate courses of Statistics which I took before 20 years. I was exercising how to construct ANOVA table for a regression...

• Replies: 14
• Views: 34,416
12-11-2009, 07:49 PM
17. ### marginal effect with wald test

Hi there, In an econometrics assignment we have to check what variable has the largest and smallest marginal effect on our dependent variable wage....

• Replies: 0
• Views: 1,788
02-14-2012, 12:29 PM
18. ### Insignificant marginal effects of a significant interaction term?

Is it possible that a highly significant interaction term, does not have significant marginal effects at various levels of the primary explanatory...

• Replies: 0
• Views: 962
02-10-2014, 07:07 AM
19. ### how to explian the insig. main effect without sig. coefficient of interaction?

I am doing the research using the panel data. My confusions follow. Y=x1+x2: X1 sig, but X2 insig. however, when interaction is put into the model...

• Replies: 3
• Views: 1,720
08-08-2016, 10:49 PM
20. ### Preliminary Analysis in MultiLevel Analysis

Hallo there, my name is David. I am currently trying to do a multi level analysis. I am attempting a simple multilevel analysis. One of my...

• Replies: 0
• Views: 1,124
09-13-2014, 03:33 AM
21. ### Multilevel: Include only two dummies of a 7-1 dummy set into random slope?

I am calculating a two-level linear multilevel analysis. A look at the random intercept random slope model showed me a significant decrease in my...

• Replies: 5
• Views: 2,509
10-16-2014, 01:50 PM
22. ### Slope over time

Hello, I wanting to compare customer counts by different stores and thought that slope would be the best way to do this. So, I used linear...

• Replies: 0
• Views: 1,083
07-13-2013, 01:38 PM
23. ### Comparing effect sizes of two longitudinal linear relationships

Is there a way to determine if one longitudinal linear relationship is significantly stronger than another? I was planning on using regression...

• Replies: 2
• Views: 384
06-08-2017, 10:16 PM
24. ### coefficient changes direction with interaction term entered

Hi I'm running a logistic regression and my first model tests the direct effects of a variable (X) which is initially negative. In the second model...

• Replies: 2
• Views: 7,299
06-13-2011, 08:47 PM
25. ### Must categorical variables always be dummy coded in linear regression?

My question is must we always dummy code categorical variables in linear regression. What if I wanted to understand the overall effect of a...

• Replies: 2
• Views: 2,131
02-06-2015, 04:43 AM
26. ### Classification with high positive predictive value

I have a two-class classification problem. I would like to train a multivariate classifier with 100% positive predictive value. In other words, I...

• Replies: 3
• Views: 1,941
09-30-2013, 11:51 AM
27. ### Damage Assessment

I apologize for this question being exceedingly vague, but I'm not sure of the correct terminology. After running a regression analysis, I have...

• Replies: 4
• Views: 3,063
05-25-2008, 09:07 AM
28. ### Model to use, fractions as independent and dependent variables

Hi, I have some background on doing regression analysis, however never on fractional variables. My question is related to model selection on...

• Replies: 1
• Views: 1,750
11-14-2015, 04:36 PM
29. ### Linear Regression

• Replies: 4
• Views: 1,862
09-25-2014, 04:28 PM
30. ### Logistic regression question

Hi everyone, I have a question regarding an exercise on Gujarati's "Basic Econometrics" (exercise 15.2 p.625 4th edition). In this exercise we are...

• Replies: 0
• Views: 2,128
03-25-2011, 05:47 AM
31. ### Weightings Problem

I have been given an EXCEL model and my assigned task is (only) to fix it for problems that I might call "unintended consequences" of the underlying...

• Replies: 4
• Views: 2,966
07-19-2007, 02:33 PM
32. ### Multiple regression analysis

Hi I was wondering if anyone can help me regarding multiple regression analysis. I have used the Stats program Minitab to analyse a large amount of...

• Replies: 1
• Views: 2,795
02-04-2008, 03:26 PM
33. ### Regression verses ANOVA models

Suppose you run both an ANOVA and a linear regression model on the same data using the same dependent variable and set of independent variables. The...

• Replies: 1
• Views: 2,571
11-07-2011, 08:03 PM
34. ### Multinomial logistic regression - testing assumptions

Hello everyone, I'm trying to perform an MLR with 4 continuous predictors for one ordinal dependent. I've tested my assumptions for the MLR except...

• Replies: 8
• Views: 2,054
07-07-2016, 09:02 AM

Hello, I need to carry out a Hausman-McFadden test before I run a multinomial logistic regression on my data. While I've successfully run an...

• Replies: 0
• Views: 1,708
07-07-2016, 07:08 AM
36. ### order determination sample size for autoregression

Hi I am new to autoregression. I want to determine the order of an autoregression given a sample of size S1. I plan to use ordinary least...

• Replies: 0
• Views: 1,655
04-13-2015, 12:44 PM
37. ### Linear regression of complex survey data using proc surveyreg, normality??

Hi, I'm trying to do a linear multivariate model of a continuous outcome (minutes per week of physical activity). The data I'm using was collected...

• Replies: 0
• Views: 917
02-05-2013, 05:28 PM
38. ### normality transformation and regression

Hi, I have performed 1/sqrtY, and sqrtY transformations on different data sets to achieve normal distribution for simple linear regressions. So...

• Replies: 6
• Views: 1,544
07-04-2014, 03:11 AM
39. ### cooks distance cutoff

Hello, I urgently need to find out what is happening in regards to below: I am doing a huge number of simple linear regressions. For each...

• Replies: 9
• Views: 10,466
08-08-2014, 10:18 PM
40. ### Multiple Linear Regression Problem

Hi, I want to do a multiple regression analysis. I have one Y which are numeric values (sample number = 85) and the following Xs. Sr...

• Replies: 1
• Views: 907
08-18-2014, 01:13 AM
41. ### Can the PCA scores be used as variables in multiple linear regression

Hello, I used PCA to reduce the dimensions of a data set of 10 variables into 2 principal components (describing 82% of variance in data set of 10...

• Replies: 6
• Views: 1,899
08-31-2014, 04:04 AM
42. ### Confused: Mixed model, step-wise regression, testing for random effects

Dear all, I want to perform a MLR (mixed model) on a data set (details below) that has both numeric and categorical explanatory variables. The...

• Replies: 0
• Views: 1,265
08-30-2014, 04:53 AM
43. ### Comparing Multiple Regression across multiple groups

I am looking at 4 different predictors of eating disorders in 4 different groups of participants (Caucasians, Af Americans, Lations, and Asian...

• Replies: 1
• Views: 2,654
03-12-2013, 02:58 PM
44. ### Multiple regression Analysis-How many regression analyses do I need to run?

In the present study we examined whether religious affiliation, education level, and negative affect were uniquely associated with the core beliefs...

• Replies: 3
• Views: 1,511
11-28-2012, 04:07 PM
45. ### 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...

• Replies: 8
• Views: 2,771
11-29-2012, 01:43 AM
46. ### Adjusting for gender in total brain volume

Is there a way to adjust for the effect of gender on the outcome measure - brain volume without using it as just a co-variate. i.e. can I transform...

• Replies: 0
• Views: 1,946
09-18-2013, 05:45 PM
47. ### Checking homoscedasticity in repeated measures

Hello, When checking the assumption of constant variance for repeated measures data, am I correct in thinking that the variance of residuals...

• Replies: 0
• Views: 1,469
02-18-2015, 11:36 AM
48. ### Help with linear regression when multiple subjects

Hi, I have some data where each subject is presented with pairwise combinations of four test items (A, B, C and D). Each observation is a...

• Replies: 0
• Views: 1,359
01-11-2016, 06:01 AM
49. ### Regression to compare mean differences?

Hi everyone, I am doing a project with two different groups (clinical and control). I want to compare their scores on a couple of variables (ex:...

• Replies: 1
• Views: 1,438
04-26-2016, 06:23 AM
50. ### Panel Data Regression using Stata/SPSS

Please I need help. I am trying to run multiple regression analysis using SPSS and Stata but what am getting is not good at all. Can anybody help?...

• Replies: 0
• Views: 4,683
08-30-2011, 05:56 AM
51. ### [Mplus] Decreasing iterations changes p value

I'm doing longitudinal regression analysis using mplus, with cross-lagged models. In my analyses, I compare two models: one without constraints (H0),...

• Replies: 0
• Views: 1,533
05-20-2014, 04:29 AM
52. ### negative semipartial correlations and their confidence intervals - help!

hi, i'm in a bind and was hoping someone could shed some light. I have determined negative partial coefficients, standardised partial coefficients,...

• Replies: 0
• Views: 1,402
05-14-2013, 07:14 PM
53. ### Calculating probabilities from logit parameters estimated with effect coding

Hello, I calculated this multinomial logit model using an effect coding (-1 0 1). The variable edu3 is the education level (3 categories), sex has...

• Replies: 0
• Views: 2,080
12-21-2016, 03:39 AM
54. ### Translate multinomial logit regression parameters into binomial

Hello, I have those parameters from a multinomial logit regression that explains Education (L/M/H) by language (Dominant/Other Europe/Non-European)....

• Replies: 0
• Views: 559
05-10-2017, 06:12 AM
55. ### Gauss Elimination

Hi guys. Im being asked to program Gauss Elimination in R .Im new using this kind of program. It's simple but i don't know how to start. can someone...

• Replies: 13
• Views: 8,059
06-09-2011, 10:25 AM
56. ### Multiple Lineair Regression - Another variable needed ?

Hey, I'm doing a research on 3 variables, exchange rates, macroeconomic news and net speculative positions. So far I have a regression with...

• Replies: 0
• Views: 771
05-06-2013, 04:39 AM
57. ### Rsquared vs Adjusted Rsquared

Hello, I have a question regarding to rsquare. I have a model with 1 independent variable which I measure with Rsquare and I have a model with 3...

• Replies: 9
• Views: 2,286
08-23-2013, 03:58 AM

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