# Longley

From AER v1.2-6
by Achim Zeileis

##### Longley's Regression Data

US macroeconomic time series, 1947--1962.

- Keywords
- datasets

##### Usage

`data("Longley")`

##### Details

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

is available as `longley`

in base R.

##### 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.

##### 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

##### Examples

```
# NOT RUN {
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)
# }
```

*Documentation reproduced from package AER, version 1.2-6, License: GPL-2 | GPL-3*

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