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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Urgent Help Required.....

Dear all, i am doing a research these days. but i am facing a difficulty in statistics analysis. Actually i have measured a quantity "A" in the...

• Replies: 10
• Views: 1,985
11-30-2012, 09:37 AM
2. ### multiple regression categorical variable and different slopes

Hi All, I’m trying to run multiple regression with 2 independent variables and one categorical variable (two levels: male vs. female). The...

• Replies: 4
• Views: 2,066
11-30-2012, 05:13 AM
3. ### testing interaction between two independent variables

To test for interaction between two independent variables in a linear multiple regression model (e.g. 'A' and 'B' as independent variables; 'C' as...

• Replies: 0
• Views: 3,920
11-29-2012, 04:40 PM
4. ### 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: 2,775
11-29-2012, 01:43 AM
5. ### Pos. or Neg. Correlation with Error Term?

in IV regression, how can I tell if an endogenous variable (Pi) is positively or negatively correlated with the error term? The only information I...

• Replies: 0
• Views: 1,986
11-28-2012, 09:34 PM
6. ### Tobit Model -Not sure whether DV is appropriate

Hi, I have a large panel of households and am wanting to test the impact of demographic and socioeconomic factors on the diversification of asset...

• Replies: 2
• Views: 1,258
11-28-2012, 05:59 PM
7. ### 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: 1,512
11-28-2012, 04:07 PM
8. ### SPSS and regression - possible dummy coding?

I am struggling to run an analysis of this data. I have 3 levels of teaching methods as one independent variable, I also have a dependent outcome of...

• Replies: 1
• Views: 2,233
11-28-2012, 02:45 AM
9. ### Combining models into single one

Yi = B0 + (B1X1,i) + (B2X2,i) + ui Yi = A1 + (A2X1,i) + (A3X2,i) + ui How to formulate these two models as one single linear model using the...

• Replies: 1
• Views: 1,366
11-26-2012, 11:05 AM
10. ### 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...

• Replies: 0
• Views: 2,292
11-22-2012, 08:00 AM
11. ### How would I find the specific impact of two variables for an observer response?

I have collected some data (on an 11 point scale from -5 through 0 to +5) of observer judgements of the emotion presented on the central face in a...

• Replies: 0
• Views: 1,520
11-21-2012, 02:13 PM
12. ### 22 enough for multiple regression?

Hello guys, i am doing a thesis on a given industry having only 22 enterprises. As the population size is small i have decided to go for census. But...

• Replies: 5
• Views: 1,913
11-20-2012, 02:58 AM
13. ### Method agreement for ordinal and continuous outcomes?

Hi, so, I came to the Regression Analysis forum because my first thought was to potentially do some sort of ICC. I am consulting on a project...

• Replies: 2
• Views: 2,598
11-19-2012, 10:04 PM
14. ### I need help with probit/logit regression

Hi. Here is my situation. I ran an discrete choice experiment (orthoplan - 16 cards) with 2 4-level variables and 3 2-leves variables: 1 (days) -...

• Replies: 0
• Views: 1,327
11-19-2012, 03:38 AM
15. ### Multivariate Regression vs Canonical Correlation

I know the difference between correlation and regression, however, I'm a little confused with the difference between Canonical Correlation (CCR) and...

• Replies: 1
• Views: 4,221
11-17-2012, 06:55 PM
16. ### curvature

I have a set of data that i would like to find out if it has a curvature. i was told that you can apply ANOV analysis to see if curvature is...

• Replies: 1
• Views: 1,526
11-16-2012, 11:57 PM
17. ### How to interpret parameter estimates

Hi, I have some output here from R, it contains the parameter estimates, the standard deviation of these estimates, the z value, the...

• Replies: 1
• Views: 3,550
11-15-2012, 05:58 PM
18. ### Linear regression - Controlling the pre-measure of my response variable

Hello everyone! :wave: Context: I want to analyze the change in anxiety scores (STAI) in a group of patients undergoing surgery and relate it to...

• Replies: 5
• Views: 3,150
11-14-2012, 11:53 AM
19. ### Multiplicative semiparametric regression

Hello, I have problems concerning a semiparametric regression. The relationship between the dependent variable Y and the independent variable X...

• Replies: 0
• Views: 1,394
11-14-2012, 04:37 AM
20. ### Would Seemingly Unrelated Regression apply here?

I am trying to model changes in employee behavior along two different dimensions, y1 and y2, as a function of several explanatory variables, X (e.g.,...

• Replies: 0
• Views: 1,096
11-13-2012, 05:56 PM
21. ### R squared equals 1 in Stepwise regression analysis

Hi I have carried out stepwise regression analysis using SPSS and the resulting r squared equals 1. I wonder if this R squared is acceptable or...

• Replies: 1
• Views: 3,720
11-13-2012, 09:25 AM
22. ### Multiple Regression - Multicollinearity

Hi I'd really appreciate it if anyone could help me with this. I'm doing statistics coursework as part of a Psychology degree and have come across...

• Replies: 5
• Views: 1,914
11-12-2012, 03:58 AM
23. ### Are these models nested?

I have three logistic regression models. Model 1 is the reference model with covariates GA + BW. Model 2 is a quadratic model with GA + BW +...

• Replies: 9
• Views: 3,764
11-11-2012, 04:37 PM
24. ### SPSS- logistic regression, three patient groups, ROC curve

Hi all, I have three groups of patients, and 6 variables for each patient. I want to combine these variables and make a multiclass ROC curve, in...

• Replies: 4
• Views: 10,901
11-11-2012, 09:54 AM
25. ### Testing for Panel Cross-Sectional Dependence

Hi, I am running a panel data regression in Stata, with unbalanced data over time and countries. I want to test if there is panel cross-sectional...

• Replies: 0
• Views: 2,935
11-09-2012, 03:51 AM
26. ### Skewed dependent variable in logistic regression-how to handle

I am conducting research on juvenile firesetting with a child's self report of firesetting as my dependent variable.(0= never played with or set...

• Replies: 4
• Views: 6,651
11-08-2012, 07:18 PM
27. ### Question of independence of one variable in a logistic regression model

I have been asked to analysis a logistic regression looking for potential predictors of precepting excellence based on collegiate level student...

• Replies: 0
• Views: 896
11-08-2012, 08:49 AM
28. ### statistical test between two correlation matrix

Dear all, Recently, I have trouble with the following errors, I'm not sure how i could figure it out after my google again and again,Hope someone...

• Replies: 2
• Views: 1,845
11-06-2012, 08:52 PM
29. ### [Book suggestion] Analysis strategy

So, I feel like what I've had in mind of statistics is sort of fragmented, but have trouble putting pieces together in a coherent and systematic...

• Replies: 0
• Views: 1,127
11-01-2012, 02:53 PM
30. ### Zero-inflated continuous independent variables

Are there ways of handling zero-inflated continuous independent variables?

• Replies: 4
• Views: 6,073
11-01-2012, 10:44 AM
31. ### Calculate Intercept for multiple regression

I have been using a simple Logistic Regression method with Log odds and it works very well for me This is an example X yes no total Prob Odds Log...

• Replies: 0
• Views: 2,543
10-31-2012, 09:21 AM
32. ### 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...

• Replies: 0
• Views: 922
10-31-2012, 05:29 AM
33. ### Covariance and Correlation for Regression Model

I've been looking over some regression models lately and I came across one which, although similar, differs from the "standard" simple linear model....

• Replies: 0
• Views: 1,282
10-30-2012, 08:32 PM
34. ### Lack-of-fit for repeated measures

Greetings, I'm looking to run a lack-of-fit test on repeated measures data. To summarize my problem, I want to test whether an eight-factor...

• Replies: 0
• Views: 1,193
10-30-2012, 10:37 AM
35. ### Binary Logistic Regression (No Reference Category)?

I am currently working on my graduate thesis and was instructed to do a logistic regression by my adviser, but I'm a bit confused with the SPSS...

• Replies: 1
• Views: 1,631
10-29-2012, 07:45 AM
36. ### How to explain the cause of interaction variable?

Hello, I am currently doing statistical analysis for a project, and I am stuck with the following problem. If any of you could help me with this I...

• Replies: 0
• Views: 1,189
10-27-2012, 04:07 PM
37. ### Cointegration

Hi guys, 1) I have the time series model y_t = a + bx_t + e_t where y_t and x_t are I(1), and I've been asked to run an ADF test over e_t to...

• Replies: 1
• Views: 1,344
10-27-2012, 01:00 PM
38. ### The frequency distribution of residuals

The residual distribution should be normal with mean zero if possible. However, I have a situation where after nonlinear least squares, I get a...

• Replies: 1
• Views: 1,803
10-26-2012, 06:52 AM
39. ### Multilevel linear growth modelling: an appropriate method?

Hi, I'm just wondering if I am following the right line of thought for my analysis. I've got longitudinal data (4 years) and a single outcome...

• Replies: 0
• Views: 890
10-26-2012, 04:56 AM
40. ### multiple linear regression

Hi there, I want to find the effect of explanatory variables (factors) such age, job, sex on questionnaires' factors. My question is can I use...

• Replies: 0
• Views: 1,100
10-25-2012, 08:38 AM
41. ### how to regress ownership concentration on country dummies: SPSS

Help, I've been reading through a journal but I do not understand what the author is referring to. In the journal, he writes that "When I regress...

• Replies: 0
• Views: 897
10-24-2012, 10:57 PM
42. ### Help Newbie With Regression

I'm very new to regression and have a ton of data I want to analyse that I think would benefit from regression but I'm not sure how to apply it. I...

• Replies: 3
• Views: 1,247
10-24-2012, 02:08 PM
43. ### Simple Linear Regression Coefficient Estimation Across n Samples

Hello, I was hoping that somebody could provide some assistance on the following topic: Consider a random variable Y with mean: y = \alpha +...

• Replies: 3
• Views: 1,464
10-24-2012, 09:18 AM
44. ### Bayes Rule to summarize time series cumulative Logistic Regression output

Hello, I have been struggling to find a definitive answer to what should be a very simple question. I have a logistic regression model that...

• Replies: 0
• Views: 965
10-23-2012, 10:49 AM
45. ### 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,...

• Replies: 0
• Views: 935
10-23-2012, 09:43 AM
46. ### Constant Elasticity Model

I was wondering if anyone could please try to help me understand where I'm going wrong with the following logic: I have been trying to look at a...

• Replies: 1
• Views: 7,379
10-23-2012, 09:31 AM
47. ### Comparing coefficients in Seemingly Unrelated Regressions

Hello I have a panel data set and have estimated two regression models with the same set of independent variables but different response variable. I...

• Replies: 0
• Views: 2,500
10-22-2012, 12:28 PM
48. ### Linear regression, predictor contains same components as depedent variable

I came across this model: y(t) = f (y(t-1), X) where y ia a centered 3-month average, for example, for aug'12, y=average of Jul, Aug and Sep...

• Replies: 1
• Views: 1,018
10-22-2012, 08:01 AM
49. ### Multiple Regression

I am trying to figure out how to determine how long someone has been part of a study. The information provided is as follows: Supplements ...

• Replies: 1
• Views: 1,085
10-22-2012, 01:59 AM
50. ### Correcting lack of fit

I have a very simple data set with a single regressor that has all negative values. The data set provides no context, only values. When testing...

• Replies: 4
• Views: 2,055
10-21-2012, 02:01 PM
51. ### Fama MacBeth regression + different fiscal year end

dear all, t's z 1st time that i make research and i'm new to state so i had several questions, can i apply fama macbeth regression for a short time...

• Replies: 0
• Views: 2,497
10-21-2012, 12:48 PM
52. ### Additive - Multiplicative and Non Linear Regression

Hello, Let us say that we have a dependent binary variable expressing the occurence and non occurence of an event. We also have a number of...

• Replies: 0
• Views: 2,463
10-21-2012, 12:20 PM
53. ### Parzen Window

Hello, Is there any newer or better method (instead of Parzen) for estimating a probability density function from a set of data? for example can...

• Replies: 2
• Views: 1,955
10-21-2012, 12:04 PM
54. ### Odds Ratio Interpretation in Logistic Regression when input is Log-Transformed

Hello, Lets us have a binary dependent variable with 1 as the event and 0 as the non-event. We model the probability of event. The independent...

• Replies: 0
• Views: 3,705
10-21-2012, 08:59 AM
55. ### 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...

• Replies: 0
• Views: 1,293
10-19-2012, 08:42 PM

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