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Joachim Schork's user avatar
Joachim Schork's user avatar
Joachim Schork's user avatar
Joachim Schork
  • Member for 9 years, 7 months
  • Last seen more than a week ago
9 votes
1 answer
4k views

Group elastic net

8 votes
4 answers
24k views

Is MSE decreasing with increasing number of explanatory variables?

8 votes
1 answer
6k views

Is feature selection with dummy coding of categorical variables problematic? [duplicate]

8 votes
3 answers
8k views

Similarity measures for more than 2 variables

7 votes
2 answers
46k views

Forward-backward model selection: What is the starting model?

7 votes
1 answer
15k views

Tune alpha and lambda parameters of elastic nets in an optimal way

5 votes
2 answers
1k views

Elastic net: How to improve unstable cross validation of lambda

4 votes
0 answers
1k views

Elastic net: Calculate 1 standard error of lambda (lambda.1se) via caret or by hand [closed]

4 votes
1 answer
3k views

Is multicollinearity problematic for imputation models?

3 votes
1 answer
2k views

Why is MSE of cross validation higher compared to a linear model

3 votes
0 answers
1k views

Tobit model (or survival analysis) for imputation of censored data in R

3 votes
1 answer
2k views

Predictive Mean Matching as Single Imputation?

2 votes
1 answer
498 views

Should You Take the Average of Two Test Score Percentiles?

2 votes
0 answers
111 views

How to explain differences in formulas of ridge regression, lasso, and elastic net [duplicate]

2 votes
0 answers
1k views

Lasso variable selection consistency: "irrepresentable condition" explained in a non-technical way?

2 votes
0 answers
924 views

Test difference of population proportion and weighted sample proportion

1 vote
0 answers
49 views

Automatic variable selection for imputation modelling

1 vote
0 answers
2k views

Faster alternative of forward/backward model selection for big datasets

1 vote
1 answer
754 views

Popular (single) imputation methods for ordinal variable

1 vote
0 answers
152 views

Multiple imputation: How many subjects per variable are needed?

1 vote
0 answers
2k views

Gower's (dis)similarity: How are numeric values scaled?

1 vote
1 answer
40 views

Why should variables that are related to nonresponse be included into an imputation model?

0 votes
0 answers
48 views

Impute values on household level based on person level data

0 votes
0 answers
1k views

How to transform ordinal categorical income into a continuous variable?

0 votes
0 answers
544 views

Monte Carlo Simulations: Can I Use Real Data as Universe?