100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Research skills summaries 2020/2021 $6.98
Add to cart

Class notes

Research skills summaries 2020/2021

 29 views  1 purchase
  • Course
  • Institution

Excellent and thorough summaries that will ensure a pass.

Preview 4 out of 50  pages

  • October 5, 2021
  • 50
  • 2020/2021
  • Class notes
  • Mathijs cosemans
  • All classes
avatar-seller
Instruction videos
OLS regression
Definitions and SE tests

- Autocorrelation means that a variable (or error term) at time t is influenced by the values of
the same variable (error term) at time t-n
- Heteroscedasticity means that the variance of the error terms is not constant along the
regression line (over time)
- Above both bias the standard errors (and thus significance level), not the beta coefficient!
- Use White standard errors if heteroscedasticity is apparent
- Use Newey-west standard errors if autocorrelation or both are apparent!

Stata commands see video



Panel regression in Stata




- Heterogeneity leads to OVB beta coefficients are incorrect




1

,Probit model
- Use probit if y is dummy!




- Values can only be 0 or 1 (because dummy) so you can not use OLS (because than bigger or
smaller than 1 or 0 is possible)
- Probit: looks at probability if y=1




-




2

, -




Interaction effects
- Test if two independent variables (X) increase or decrease each other’s influence on
dependent vriable (Y)
- Example: [ gender, hours of prep] grade mathematics exam
- Interaction between gender and preparation: male/female students learn more within one
hour of prep.




-


3

, Interaction effect!
B3 is difference in slope coefficient B2 between male and female. B3 negative (because
female slope is less steep)




4

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller martinvandermersch. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $6.98. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

52510 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$6.98  1x  sold
  • (0)
Add to cart
Added