Displaying 6 results from an estimated 6 matches for "psid1976".
2011 Jul 11
1
Robust vce for heckman estimators
When using function heckit() from package ‘sampleSelection’, is there anyway to make t-tests for the coefficients using robust covariance matrix estimator? By “robust” I mean something like if a had an object ‘lm’ called “reg” and then used:
> coeftest(reg, vcov = vcovHC(reg)).
I’m asking this because in Stata we could use function heckman and then use vce option “robust”. We could do the
2018 Dec 15
2
Documentation examples for lm and glm
...useful addition to "datasets". For example a more granular version of the
"Titanic" data (in addition to the 4-way tabel ?Titanic). Or another
relatively straightforward data set, popular in econometrics and social
sciences is the "Mroz" data, see e.g., help("PSID1976", package = "AER").
I would be happy to help with these if such additions were considered for
datasets/stats.
On Sat, 15 Dec 2018, David Hugh-Jones wrote:
> I would argue examples should encourage good practice. Beginners ought to
> learn to keep data in data frames and no...
2018 Dec 16
3
Documentation examples for lm and glm
...datasets". For example a more granular version of the
>> "Titanic" data (in addition to the 4-way tabel ?Titanic). Or another
>> relatively straightforward data set, popular in econometrics and social
>> sciences is the "Mroz" data, see e.g., help("PSID1976", package = "AER").
>>
>> I would be happy to help with these if such additions were considered for
>> datasets/stats.
>>
>>
>> On Sat, 15 Dec 2018, David Hugh-Jones wrote:
>>
>>> I would argue examples should encourage good pra...
2018 Dec 15
0
Documentation examples for lm and glm
...to "datasets". For example a more granular
>version of the "Titanic" data (in addition to the 4-way tabel
>?Titanic). Or another relatively straightforward data set, popular in
>econometrics and social sciences is the "Mroz" data, see e.g.,
>help("PSID1976", package = "AER").
>
>I would be happy to help with these if such additions were considered
>for datasets/stats.
>
>
>On Sat, 15 Dec 2018, David Hugh-Jones wrote:
>
>>I would argue examples should encourage good practice. Beginners ought to
>>learn...
2018 Dec 17
0
Documentation examples for lm and glm
...e a more
>>> granular version of the "Titanic" data (in addition to the 4-way
>>> tabel ?Titanic). Or another relatively straightforward data set,
>>> popular in econometrics and social sciences is the "Mroz" data, see
>>> e.g., help("PSID1976", package = "AER").
>>>
>>> I would be happy to help with these if such additions were
>>> considered for datasets/stats.
>>>
>>>
>>> On Sat, 15 Dec 2018, David Hugh-Jones wrote:
>>>
>>>> I would argue exampl...
2018 Dec 14
7
Documentation examples for lm and glm
FWIW, before all the examples are changed to data frame variants, I think there's fairly good reason to have at least _one_ example that does _not_ place variables in a data frame.
The data argument in lm() is optional. And there is more than one way to manage data in a project. I personally don't much like lots of stray variables lurking about, but if those are the only variables out