1415 search results for "regression"

Playing with quantiles, part 2

March 8, 2011
By
Playing with quantiles, part 2

It is common to look at best time at the Marathon. Or perhaps the distribution of the top100, as done by John Myles White on his blog here (data can be found there), as the graph below, with the density of the time for the first 100 men (in blue) a...

Read more »

Playing with quantiles, part 1

March 8, 2011
By
Playing with quantiles, part 1

A standard idea in extreme value theory (see e.g. here, in French unfortunately) is that to estimate the 99.5% quantile (say), we just need to estimate a quantile of level 95% for observations exceeding the 90% quantile. In extreme value theory,...

Read more »

A Short Return to the Age-Earnings Profile

March 8, 2011
By
A Short Return to the Age-Earnings Profile

Two posts ago I mentioned the age-earnings profile but did not provide a regression of log earnings on wage. I also offered, without evidence, that fitting a simple linear regression would be inappropriate. How do I know that? How could … Continue reading →

Read more »

Video Tutorial on Instrumental Variables in R

March 8, 2011
By
Video Tutorial on Instrumental Variables in R

Update: I have replaced this video tutorial with a video tutorial on a newer, easier to use IV regression command. Check out that command here.In this video, I show how to use my instrumental variables function in R, ivreg(), along with its companion ...

Read more »

Our Friend the Age-Earnings Profile

March 7, 2011
By
Our Friend the Age-Earnings Profile

I like Labor Economics. Partially because it has a nice mix of theory and practical empiricism, but mostly because it seems to be a sub-field with a number of agreed upon stylized facts that grow not out of micro theory … Continue reading →

Read more »

Example 8.29: Risk ratios and odds ratios

March 7, 2011
By
Example 8.29: Risk ratios and odds ratios

When can you safely think of an odds ratio as being similar to a risk ratio?Many people find odds ratios hard to interpret, and thus would prefer to have risk ratios. In response to this, you can find several papers that purport to convert an odds rat...

Read more »

R Tutorial Series: ANOVA Pairwise Comparison Methods

March 7, 2011
By
R Tutorial Series: ANOVA Pairwise Comparison Methods

When we have a statistically significant effect in ANOVA and an independent variable of more than two levels, we typically want to make follow-up comparisons. There are numerous methods for making pairwise comparisons and this tutorial will demonstrate...

Read more »

R Tutorial Series: ANOVA Pairwise Comparison Methods

March 7, 2011
By
R Tutorial Series: ANOVA Pairwise Comparison Methods

When we have a statistically significant effect in ANOVA and an independent variable of more than two levels, we typically want to make follow-up comparisons. There are numerous methods for making pairwise comparisons and this tutorial will demonstrate...

Read more »

Factor models of variance in finance

March 7, 2011
By
Factor models of variance in finance

In “What the hell is a variance matrix?” I talked about the basics of variance matrices and highlighted challenges for estimating them in finance.  Here we look more deeply at the most popular estimation technique. Models for variance matrices The types of variance estimates that are used in finance can be classified as: Sample estimate … Continue reading...

Read more »

Boxplots & Beyond IV: Beanplots

Boxplots & Beyond IV: Beanplots

This post is the last in a series of four on boxplots and some of their extensions.  Previous posts in this series have discussed basic boxplots, modified boxplots based on a robust asymmetry measure, and violin plots, an alternative that essentia...

Read more »