## Longley's Regression Data

### Description

US macroeconomic time series, 1947–1962.

### Usage

data("Longley")

### Format

An annual multiple time series from 1947 to 1962 with 4 variables.

- employment
Number of people employed (in 1000s).

- price
GNP deflator.

- gnp
Gross national product.

- armedforces
Number of people in the armed forces.

### Details

An extended version of this data set, formatted as a `"data.frame"`

is available as `longley`

in base R.

### Source

Online complements to Greene (2003). Table F4.2.

http://pages.stern.nyu.edu/~wgreene/Text/tables/tablelist5.htm

### References

Greene, W.H. (2003). *Econometric Analysis*, 5th edition. Upper Saddle River, NJ: Prentice Hall.

Longley, J.W. (1967). An Appraisal of Least-Squares Programs from the Point of View of the User.
*Journal of the American Statistical Association*, **62**, 819–841.

### See Also

`longley`

, `Greene2003`

### Examples

data("Longley")
library("dynlm")
## Example 4.6 in Greene (2003)
fm1 <- dynlm(employment ~ time(employment) + price + gnp + armedforces,
data = Longley)
fm2 <- update(fm1, end = 1961)
cbind(coef(fm2), coef(fm1))
## Figure 4.3 in Greene (2003)
plot(rstandard(fm2), type = "b", ylim = c(-3, 3))
abline(h = c(-2, 2), lty = 2)